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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:41:31,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:41:31,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:41:31,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-13 21:41:31,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:41:31,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:41:31,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:41:31,407 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 [2019-10-13 21:41:31,441 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:41:31,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:41:31,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:41:31,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:41:31,443 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:41:31,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:41:31,446 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:41:31,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:41:31,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:41:31,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:41:31,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:41:31,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:41:31,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:41:31,447 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:41:31,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:41:31,447 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:41:31,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:41:31,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:41:31,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:41:31,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:41:31,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:41:31,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:41:31,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:41:31,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:41:31,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:41:31,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:41:31,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:41:31,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:41:31,450 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 [2019-10-13 21:41:31,758 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:41:31,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:41:31,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:41:31,790 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:41:31,791 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:41:31,791 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-10-13 21:41:31,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ce2289/01e678ec154b423cb4a66cd6358f7791/FLAGd0557a268 [2019-10-13 21:41:32,471 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:41:32,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-10-13 21:41:32,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ce2289/01e678ec154b423cb4a66cd6358f7791/FLAGd0557a268 [2019-10-13 21:41:32,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/367ce2289/01e678ec154b423cb4a66cd6358f7791 [2019-10-13 21:41:32,721 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:41:32,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:41:32,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:32,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:41:32,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:41:32,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:32" (1/1) ... [2019-10-13 21:41:32,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d066b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:32, skipping insertion in model container [2019-10-13 21:41:32,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:32" (1/1) ... [2019-10-13 21:41:32,743 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:41:32,799 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:41:33,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:33,271 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:41:33,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:33,533 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:41:33,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33 WrapperNode [2019-10-13 21:41:33,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:33,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:41:33,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:41:33,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:41:33,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (1/1) ... [2019-10-13 21:41:33,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (1/1) ... [2019-10-13 21:41:33,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (1/1) ... [2019-10-13 21:41:33,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (1/1) ... [2019-10-13 21:41:33,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (1/1) ... [2019-10-13 21:41:33,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (1/1) ... [2019-10-13 21:41:33,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (1/1) ... [2019-10-13 21:41:33,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:41:33,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:41:33,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:41:33,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:41:33,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (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 [2019-10-13 21:41:33,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:41:33,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:41:33,770 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:41:33,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:41:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:41:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:41:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:41:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:41:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:41:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:41:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:41:35,893 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:41:35,893 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:41:35,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:35 BoogieIcfgContainer [2019-10-13 21:41:35,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:41:35,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:41:35,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:41:35,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:41:35,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:41:32" (1/3) ... [2019-10-13 21:41:35,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631bb252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:35, skipping insertion in model container [2019-10-13 21:41:35,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:33" (2/3) ... [2019-10-13 21:41:35,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631bb252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:35, skipping insertion in model container [2019-10-13 21:41:35,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:35" (3/3) ... [2019-10-13 21:41:35,904 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2019-10-13 21:41:35,915 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:41:35,924 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:41:35,936 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:41:35,970 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:41:35,970 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:41:35,970 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:41:35,971 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:41:35,971 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:41:35,971 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:41:35,971 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:41:35,971 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:41:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-13 21:41:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 21:41:36,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:36,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:36,030 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:36,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash -219365321, now seen corresponding path program 1 times [2019-10-13 21:41:36,045 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:36,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715312137] [2019-10-13 21:41:36,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:36,046 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:36,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:36,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715312137] [2019-10-13 21:41:36,538 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:36,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:36,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346234959] [2019-10-13 21:41:36,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:36,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:36,563 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-13 21:41:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:37,068 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-13 21:41:37,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:37,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-13 21:41:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:37,095 INFO L225 Difference]: With dead ends: 273 [2019-10-13 21:41:37,095 INFO L226 Difference]: Without dead ends: 175 [2019-10-13 21:41:37,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-13 21:41:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-13 21:41:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-13 21:41:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-13 21:41:37,206 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-13 21:41:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:37,208 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-13 21:41:37,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-13 21:41:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 21:41:37,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:37,222 INFO L380 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] [2019-10-13 21:41:37,223 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:37,224 INFO L82 PathProgramCache]: Analyzing trace with hash -701900100, now seen corresponding path program 1 times [2019-10-13 21:41:37,225 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:37,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90723762] [2019-10-13 21:41:37,225 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:37,225 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:37,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:37,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90723762] [2019-10-13 21:41:37,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:37,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:37,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980547748] [2019-10-13 21:41:37,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:37,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:37,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:37,443 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-13 21:41:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:37,865 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-13 21:41:37,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:37,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-13 21:41:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:37,871 INFO L225 Difference]: With dead ends: 513 [2019-10-13 21:41:37,871 INFO L226 Difference]: Without dead ends: 343 [2019-10-13 21:41:37,873 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 [2019-10-13 21:41:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-13 21:41:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-13 21:41:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-13 21:41:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 575 transitions. [2019-10-13 21:41:37,898 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 575 transitions. Word has length 94 [2019-10-13 21:41:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:37,899 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 575 transitions. [2019-10-13 21:41:37,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 575 transitions. [2019-10-13 21:41:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 21:41:37,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:37,902 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:37,902 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:37,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1307303777, now seen corresponding path program 1 times [2019-10-13 21:41:37,903 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:37,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162811634] [2019-10-13 21:41:37,903 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:37,904 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:37,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:38,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162811634] [2019-10-13 21:41:38,016 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:38,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:41:38,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407815737] [2019-10-13 21:41:38,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:41:38,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:41:38,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:41:38,022 INFO L87 Difference]: Start difference. First operand 343 states and 575 transitions. Second operand 6 states. [2019-10-13 21:41:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:38,722 INFO L93 Difference]: Finished difference Result 1059 states and 1887 transitions. [2019-10-13 21:41:38,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:41:38,723 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-13 21:41:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:38,732 INFO L225 Difference]: With dead ends: 1059 [2019-10-13 21:41:38,732 INFO L226 Difference]: Without dead ends: 721 [2019-10-13 21:41:38,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:41:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-13 21:41:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 703. [2019-10-13 21:41:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2019-10-13 21:41:38,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1170 transitions. [2019-10-13 21:41:38,813 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1170 transitions. Word has length 108 [2019-10-13 21:41:38,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:38,813 INFO L462 AbstractCegarLoop]: Abstraction has 703 states and 1170 transitions. [2019-10-13 21:41:38,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:41:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1170 transitions. [2019-10-13 21:41:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 21:41:38,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:38,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:38,818 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2071202027, now seen corresponding path program 1 times [2019-10-13 21:41:38,819 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:38,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311094826] [2019-10-13 21:41:38,819 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:38,819 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:38,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:38,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311094826] [2019-10-13 21:41:38,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:38,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:41:38,940 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666362934] [2019-10-13 21:41:38,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:41:38,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:41:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:41:38,941 INFO L87 Difference]: Start difference. First operand 703 states and 1170 transitions. Second operand 6 states. [2019-10-13 21:41:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:39,766 INFO L93 Difference]: Finished difference Result 1783 states and 3030 transitions. [2019-10-13 21:41:39,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:41:39,770 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-10-13 21:41:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:39,778 INFO L225 Difference]: With dead ends: 1783 [2019-10-13 21:41:39,779 INFO L226 Difference]: Without dead ends: 1085 [2019-10-13 21:41:39,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:41:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2019-10-13 21:41:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1069. [2019-10-13 21:41:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-10-13 21:41:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1682 transitions. [2019-10-13 21:41:39,829 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1682 transitions. Word has length 114 [2019-10-13 21:41:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:39,830 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1682 transitions. [2019-10-13 21:41:39,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:41:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1682 transitions. [2019-10-13 21:41:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 21:41:39,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:39,834 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2019-10-13 21:41:39,834 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash 5340402, now seen corresponding path program 1 times [2019-10-13 21:41:39,835 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:39,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141272936] [2019-10-13 21:41:39,836 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:39,836 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:39,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:40,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141272936] [2019-10-13 21:41:40,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787110078] [2019-10-13 21:41:40,090 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 [2019-10-13 21:41:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:40,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:40,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:41:40,258 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:41:40,320 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:41:40,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 10 [2019-10-13 21:41:40,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042855587] [2019-10-13 21:41:40,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:40,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:40,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:40,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:41:40,324 INFO L87 Difference]: Start difference. First operand 1069 states and 1682 transitions. Second operand 3 states. [2019-10-13 21:41:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:40,809 INFO L93 Difference]: Finished difference Result 2733 states and 4373 transitions. [2019-10-13 21:41:40,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:40,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-13 21:41:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:40,818 INFO L225 Difference]: With dead ends: 2733 [2019-10-13 21:41:40,819 INFO L226 Difference]: Without dead ends: 977 [2019-10-13 21:41:40,825 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:41:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2019-10-13 21:41:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 975. [2019-10-13 21:41:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 975 states. [2019-10-13 21:41:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1450 transitions. [2019-10-13 21:41:40,864 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1450 transitions. Word has length 121 [2019-10-13 21:41:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:40,865 INFO L462 AbstractCegarLoop]: Abstraction has 975 states and 1450 transitions. [2019-10-13 21:41:40,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:40,865 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1450 transitions. [2019-10-13 21:41:40,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 21:41:40,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:40,869 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:41,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:41,074 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash -89310220, now seen corresponding path program 1 times [2019-10-13 21:41:41,076 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:41,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350270985] [2019-10-13 21:41:41,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:41,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:41,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:41,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350270985] [2019-10-13 21:41:41,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687336550] [2019-10-13 21:41:41,323 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 [2019-10-13 21:41:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:41,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:41,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:41,479 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:41,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623758836] [2019-10-13 21:41:41,630 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-13 21:41:41,630 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:41:41,636 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:41:41,645 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:41:41,646 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:41:41,959 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-13 21:41:42,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:42,478 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:41:42,494 INFO L168 Benchmark]: Toolchain (without parser) took 9768.20 ms. Allocated memory was 138.4 MB in the beginning and 343.4 MB in the end (delta: 205.0 MB). Free memory was 100.8 MB in the beginning and 186.0 MB in the end (delta: -85.1 MB). Peak memory consumption was 119.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:42,502 INFO L168 Benchmark]: CDTParser took 1.46 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:41:42,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 807.18 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 100.6 MB in the beginning and 172.0 MB in the end (delta: -71.4 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:42,506 INFO L168 Benchmark]: Boogie Preprocessor took 155.15 ms. Allocated memory is still 205.0 MB. Free memory was 172.0 MB in the beginning and 167.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:42,508 INFO L168 Benchmark]: RCFGBuilder took 2202.38 ms. Allocated memory was 205.0 MB in the beginning and 253.8 MB in the end (delta: 48.8 MB). Free memory was 167.0 MB in the beginning and 209.1 MB in the end (delta: -42.1 MB). Peak memory consumption was 118.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:42,512 INFO L168 Benchmark]: TraceAbstraction took 6591.58 ms. Allocated memory was 253.8 MB in the beginning and 343.4 MB in the end (delta: 89.7 MB). Free memory was 209.1 MB in the beginning and 186.0 MB in the end (delta: 23.2 MB). Peak memory consumption was 112.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:42,523 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.46 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 807.18 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 100.6 MB in the beginning and 172.0 MB in the end (delta: -71.4 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.15 ms. Allocated memory is still 205.0 MB. Free memory was 172.0 MB in the beginning and 167.0 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2202.38 ms. Allocated memory was 205.0 MB in the beginning and 253.8 MB in the end (delta: 48.8 MB). Free memory was 167.0 MB in the beginning and 209.1 MB in the end (delta: -42.1 MB). Peak memory consumption was 118.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6591.58 ms. Allocated memory was 253.8 MB in the beginning and 343.4 MB in the end (delta: 89.7 MB). Free memory was 209.1 MB in the beginning and 186.0 MB in the end (delta: 23.2 MB). Peak memory consumption was 112.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...