/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:55:49,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:55:49,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:55:49,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:55:49,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:55:49,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:55:49,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:55:49,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:55:49,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:55:49,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:55:49,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:55:49,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:55:49,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:55:49,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:55:49,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:55:49,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:55:49,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:55:49,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:55:49,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:55:49,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:55:49,633 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 [2019-11-06 22:55:49,648 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:55:49,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:55:49,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:55:49,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:55:49,649 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:55:49,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:55:49,650 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:55:49,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:55:49,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:55:49,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:55:49,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:55:49,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:55:49,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:55:49,651 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:55:49,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:55:49,652 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:55:49,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:55:49,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:55:49,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:55:49,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:55:49,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:55:49,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:55:49,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:55:49,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:55:49,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:55:49,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:55:49,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:55:49,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:55:49,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:55:49,941 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:55:49,960 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:55:49,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:55:49,965 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:55:49,966 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:55:49,966 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label47.c [2019-11-06 22:55:50,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed708654/a742bda31ce94989822ffcb678a478ad/FLAGa178289d8 [2019-11-06 22:55:50,715 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:55:50,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label47.c [2019-11-06 22:55:50,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed708654/a742bda31ce94989822ffcb678a478ad/FLAGa178289d8 [2019-11-06 22:55:50,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eed708654/a742bda31ce94989822ffcb678a478ad [2019-11-06 22:55:50,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:55:50,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:55:50,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:50,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:55:50,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:55:50,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:50" (1/1) ... [2019-11-06 22:55:50,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2406b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:50, skipping insertion in model container [2019-11-06 22:55:50,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:55:50" (1/1) ... [2019-11-06 22:55:50,927 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:55:50,993 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:55:51,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:51,803 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:55:52,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:55:52,187 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:55:52,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52 WrapperNode [2019-11-06 22:55:52,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:55:52,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:55:52,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:55:52,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:55:52,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (1/1) ... [2019-11-06 22:55:52,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (1/1) ... [2019-11-06 22:55:52,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (1/1) ... [2019-11-06 22:55:52,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (1/1) ... [2019-11-06 22:55:52,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (1/1) ... [2019-11-06 22:55:52,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (1/1) ... [2019-11-06 22:55:52,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (1/1) ... [2019-11-06 22:55:52,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:55:52,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:55:52,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:55:52,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:55:52,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (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 [2019-11-06 22:55:52,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:55:52,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:55:52,441 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:55:52,441 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:55:52,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:55:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:55:52,442 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:55:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:55:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:55:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:55:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:55:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:55:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:55:54,756 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:55:54,762 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:55:54,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:54 BoogieIcfgContainer [2019-11-06 22:55:54,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:55:54,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:55:54,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:55:54,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:55:54,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:55:50" (1/3) ... [2019-11-06 22:55:54,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa38b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:54, skipping insertion in model container [2019-11-06 22:55:54,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:55:52" (2/3) ... [2019-11-06 22:55:54,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa38b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:55:54, skipping insertion in model container [2019-11-06 22:55:54,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:55:54" (3/3) ... [2019-11-06 22:55:54,778 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label47.c [2019-11-06 22:55:54,788 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:55:54,798 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:55:54,811 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:55:54,858 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:55:54,858 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:55:54,859 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:55:54,859 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:55:54,859 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:55:54,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:55:54,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:55:54,859 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:55:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:55:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 22:55:54,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:54,911 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] [2019-11-06 22:55:54,913 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1116751826, now seen corresponding path program 1 times [2019-11-06 22:55:54,929 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:54,930 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798489505] [2019-11-06 22:55:54,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:55,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798489505] [2019-11-06 22:55:55,332 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:55,332 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:55:55,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059175279] [2019-11-06 22:55:55,340 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:55:55,341 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:55,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:55:55,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:55:55,362 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:55:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:57,653 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:55:57,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:55:57,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-11-06 22:55:57,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:57,683 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:55:57,684 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:55:57,694 INFO L630 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 [2019-11-06 22:55:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:55:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:55:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:55:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-11-06 22:55:57,834 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 71 [2019-11-06 22:55:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:57,836 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-11-06 22:55:57,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:55:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-11-06 22:55:57,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 22:55:57,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:57,853 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:55:57,853 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:57,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:57,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1052551837, now seen corresponding path program 1 times [2019-11-06 22:55:57,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:57,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704674234] [2019-11-06 22:55:57,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:55:58,106 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704674234] [2019-11-06 22:55:58,106 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:58,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:55:58,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332156598] [2019-11-06 22:55:58,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:58,109 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:55:58,109 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-11-06 22:56:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:00,680 INFO L93 Difference]: Finished difference Result 2061 states and 3602 transitions. [2019-11-06 22:56:00,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:00,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2019-11-06 22:56:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:00,693 INFO L225 Difference]: With dead ends: 2061 [2019-11-06 22:56:00,693 INFO L226 Difference]: Without dead ends: 1385 [2019-11-06 22:56:00,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:56:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2019-11-06 22:56:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1377. [2019-11-06 22:56:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1377 states. [2019-11-06 22:56:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 2120 transitions. [2019-11-06 22:56:00,749 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 2120 transitions. Word has length 142 [2019-11-06 22:56:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:00,750 INFO L462 AbstractCegarLoop]: Abstraction has 1377 states and 2120 transitions. [2019-11-06 22:56:00,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 2120 transitions. [2019-11-06 22:56:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-06 22:56:00,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:00,754 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:56:00,754 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:00,754 INFO L82 PathProgramCache]: Analyzing trace with hash -564206834, now seen corresponding path program 1 times [2019-11-06 22:56:00,755 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:00,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097623674] [2019-11-06 22:56:00,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:56:00,965 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097623674] [2019-11-06 22:56:00,966 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590605075] [2019-11-06 22:56:00,966 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 [2019-11-06 22:56:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:01,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:01,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:01,163 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:01,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:56:01,265 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-11-06 22:56:01,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579478986] [2019-11-06 22:56:01,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:56:01,266 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:01,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:56:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:56:01,267 INFO L87 Difference]: Start difference. First operand 1377 states and 2120 transitions. Second operand 3 states. [2019-11-06 22:56:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:02,967 INFO L93 Difference]: Finished difference Result 2060 states and 3048 transitions. [2019-11-06 22:56:02,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:56:02,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-11-06 22:56:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:02,983 INFO L225 Difference]: With dead ends: 2060 [2019-11-06 22:56:02,983 INFO L226 Difference]: Without dead ends: 2058 [2019-11-06 22:56:02,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:56:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2019-11-06 22:56:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1716. [2019-11-06 22:56:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1716 states. [2019-11-06 22:56:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2585 transitions. [2019-11-06 22:56:03,056 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2585 transitions. Word has length 171 [2019-11-06 22:56:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:03,058 INFO L462 AbstractCegarLoop]: Abstraction has 1716 states and 2585 transitions. [2019-11-06 22:56:03,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:56:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2585 transitions. [2019-11-06 22:56:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-11-06 22:56:03,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:03,063 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:56:03,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:03,302 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:03,303 INFO L82 PathProgramCache]: Analyzing trace with hash -528114181, now seen corresponding path program 1 times [2019-11-06 22:56:03,303 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:03,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002899347] [2019-11-06 22:56:03,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:03,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002899347] [2019-11-06 22:56:03,541 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:03,541 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:03,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188595323] [2019-11-06 22:56:03,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:03,542 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:03,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:03,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:03,543 INFO L87 Difference]: Start difference. First operand 1716 states and 2585 transitions. Second operand 6 states. [2019-11-06 22:56:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:06,080 INFO L93 Difference]: Finished difference Result 4144 states and 6180 transitions. [2019-11-06 22:56:06,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:06,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 186 [2019-11-06 22:56:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:06,093 INFO L225 Difference]: With dead ends: 4144 [2019-11-06 22:56:06,093 INFO L226 Difference]: Without dead ends: 2434 [2019-11-06 22:56:06,098 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 [2019-11-06 22:56:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2019-11-06 22:56:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2409. [2019-11-06 22:56:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2409 states. [2019-11-06 22:56:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 3217 transitions. [2019-11-06 22:56:06,187 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 3217 transitions. Word has length 186 [2019-11-06 22:56:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:06,187 INFO L462 AbstractCegarLoop]: Abstraction has 2409 states and 3217 transitions. [2019-11-06 22:56:06,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 3217 transitions. [2019-11-06 22:56:06,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-11-06 22:56:06,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:06,194 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:56:06,195 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1332941046, now seen corresponding path program 1 times [2019-11-06 22:56:06,195 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:06,195 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080471385] [2019-11-06 22:56:06,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:06,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080471385] [2019-11-06 22:56:06,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122015718] [2019-11-06 22:56:06,561 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 [2019-11-06 22:56:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:06,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:06,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:06,796 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:06,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1530678876] [2019-11-06 22:56:06,991 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 316 [2019-11-06 22:56:07,042 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:56:07,043 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:56:15,202 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:56:15,203 INFO L272 AbstractInterpreter]: Visited 134 different actions 134 times. Never merged. Never widened. Performed 305 root evaluator evaluations with a maximum evaluation depth of 14. Performed 305 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:56:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:15,208 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-11-06 22:56:24,294 INFO L227 lantSequenceWeakener]: Weakened 296 states. On average, predicates are now at 78.18% of their original sizes. [2019-11-06 22:56:24,294 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-11-06 22:56:24,398 INFO L553 sIntCurrentIteration]: We unified 314 AI predicates to 314 [2019-11-06 22:56:24,398 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-11-06 22:56:24,399 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-06 22:56:24,399 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 21 [2019-11-06 22:56:24,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310613786] [2019-11-06 22:56:24,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 22:56:24,401 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 22:56:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:24,401 INFO L87 Difference]: Start difference. First operand 2409 states and 3217 transitions. Second operand 12 states. [2019-11-06 22:56:24,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 22:56:24,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:24,611 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: at least one of both input predicates is unknown: 17333#true or 19953#(or (and (= ~a16~0 11) (= ~a15~0 3) (= ~a12~0 5) (= (+ ~a18~0 87) 0) (= calculate_output_~input 6)) (and (<= calculate_output_~input 4) (= ~a16~0 11) (= ~a15~0 3) (<= 1 calculate_output_~input) (= ~a12~0 5) (= (+ ~a18~0 87) 0))) ([#2{~a18~0 = [-87;-87]; ~a16~0 = [11;11]; ~a12~0 = [5;5]; ~a15~0 = [3;3]; calculate_output_~input = [1;4]; }, {~a18~0 = [-87;-87]; ~a16~0 = [11;11]; ~a12~0 = [5;5]; ~a15~0 = [3;3]; calculate_output_~input = [6;6]; }]) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$CoverageRelation.isCovered(PredicateUnifier.java:593) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.SdHoareTripleChecker$CheckHelper.check(SdHoareTripleChecker.java:153) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.SdHoareTripleChecker.checkCall(SdHoareTripleChecker.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.EfficientHoareTripleChecker.checkCall(EfficientHoareTripleChecker.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.CachingHoareTripleChecker.checkCall(CachingHoareTripleChecker.java:125) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$CallSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:403) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.callSuccessors(AbstractInterpolantAutomaton.java:257) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.callSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.callSuccessors(TotalizeNwa.java:260) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.callSuccessors(ComplementDeterministicNwa.java:131) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.callSuccessors(ProductNwa.java:252) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.callSuccessors(ProductNwa.java:244) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addCallsAndSuccessors(NestedWordAutomatonReachableStates.java:1089) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:969) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:188) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:698) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) 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) [2019-11-06 22:56:24,621 INFO L168 Benchmark]: Toolchain (without parser) took 33707.62 ms. Allocated memory was 145.8 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 98.5 MB in the beginning and 942.3 MB in the end (delta: -843.8 MB). Peak memory consumption was 519.8 MB. Max. memory is 7.1 GB. [2019-11-06 22:56:24,623 INFO L168 Benchmark]: CDTParser took 1.50 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-06 22:56:24,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1276.40 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 98.3 MB in the beginning and 127.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 38.5 MB. Max. memory is 7.1 GB. [2019-11-06 22:56:24,633 INFO L168 Benchmark]: Boogie Preprocessor took 180.82 ms. Allocated memory is still 205.5 MB. Free memory was 127.6 MB in the beginning and 116.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2019-11-06 22:56:24,635 INFO L168 Benchmark]: RCFGBuilder took 2394.33 ms. Allocated memory was 205.5 MB in the beginning and 254.3 MB in the end (delta: 48.8 MB). Free memory was 116.8 MB in the beginning and 117.6 MB in the end (delta: -756.9 kB). Peak memory consumption was 76.9 MB. Max. memory is 7.1 GB. [2019-11-06 22:56:24,636 INFO L168 Benchmark]: TraceAbstraction took 29848.21 ms. Allocated memory was 254.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 117.6 MB in the beginning and 942.3 MB in the end (delta: -824.7 MB). Peak memory consumption was 430.4 MB. Max. memory is 7.1 GB. [2019-11-06 22:56:24,643 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.50 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1276.40 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 98.3 MB in the beginning and 127.6 MB in the end (delta: -29.3 MB). Peak memory consumption was 38.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 180.82 ms. Allocated memory is still 205.5 MB. Free memory was 127.6 MB in the beginning and 116.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2394.33 ms. Allocated memory was 205.5 MB in the beginning and 254.3 MB in the end (delta: 48.8 MB). Free memory was 116.8 MB in the beginning and 117.6 MB in the end (delta: -756.9 kB). Peak memory consumption was 76.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29848.21 ms. Allocated memory was 254.3 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 117.6 MB in the beginning and 942.3 MB in the end (delta: -824.7 MB). Peak memory consumption was 430.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: at least one of both input predicates is unknown: 17333#true or 19953#(or (and (= ~a16~0 11) (= ~a15~0 3) (= ~a12~0 5) (= (+ ~a18~0 87) 0) (= calculate_output_~input 6)) (and (<= calculate_output_~input 4) (= ~a16~0 11) (= ~a15~0 3) (<= 1 calculate_output_~input) (= ~a12~0 5) (= (+ ~a18~0 87) 0))) ([#2{~a18~0 = [-87;-87]; ~a16~0 = [11;11]; ~a12~0 = [5;5]; ~a15~0 = [3;3]; calculate_output_~input = [1;4]; }, {~a18~0 = [-87;-87]; ~a16~0 = [11;11]; ~a12~0 = [5;5]; ~a15~0 = [3;3]; calculate_output_~input = [6;6]; }]) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: at least one of both input predicates is unknown: 17333#true or 19953#(or (and (= ~a16~0 11) (= ~a15~0 3) (= ~a12~0 5) (= (+ ~a18~0 87) 0) (= calculate_output_~input 6)) (and (<= calculate_output_~input 4) (= ~a16~0 11) (= ~a15~0 3) (<= 1 calculate_output_~input) (= ~a12~0 5) (= (+ ~a18~0 87) 0))) ([#2{~a18~0 = [-87;-87]; ~a16~0 = [11;11]; ~a12~0 = [5;5]; ~a15~0 = [3;3]; calculate_output_~input = [1;4]; }, {~a18~0 = [-87;-87]; ~a16~0 = [11;11]; ~a12~0 = [5;5]; ~a15~0 = [3;3]; calculate_output_~input = [6;6]; }]): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$CoverageRelation.isCovered(PredicateUnifier.java:593) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...