/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/Problem01_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:30:16,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:30:16,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:30:16,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:30:16,989 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 22:30:17,010 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:30:17,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:30:17,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:30:17,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:30:17,013 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:30:17,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:30:17,013 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:30:17,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:30:17,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:30:17,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:30:17,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:30:17,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:30:17,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:30:17,015 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:30:17,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:30:17,015 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:30:17,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:30:17,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:30:17,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:30:17,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:30:17,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:30:17,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:30:17,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:30:17,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:30:17,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:30:17,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:30:17,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:30:17,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:30:17,017 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 22:30:17,278 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:30:17,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:30:17,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:30:17,296 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:30:17,296 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:30:17,296 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2019-11-06 22:30:17,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3053063/ee25f04206dc42afa24e038c9c789d6c/FLAG1895d4610 [2019-11-06 22:30:17,928 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:30:17,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label35.c [2019-11-06 22:30:17,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3053063/ee25f04206dc42afa24e038c9c789d6c/FLAG1895d4610 [2019-11-06 22:30:18,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3053063/ee25f04206dc42afa24e038c9c789d6c [2019-11-06 22:30:18,239 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:30:18,240 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:30:18,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:18,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:30:18,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:30:18,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:18,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389c572b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18, skipping insertion in model container [2019-11-06 22:30:18,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:18,256 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:30:18,306 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:30:18,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:18,798 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:30:18,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:18,971 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:30:18,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18 WrapperNode [2019-11-06 22:30:18,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:18,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:30:18,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:30:18,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:30:18,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:18,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:19,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:19,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:19,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:19,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:19,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (1/1) ... [2019-11-06 22:30:19,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:30:19,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:30:19,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:30:19,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:30:19,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (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 22:30:19,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:30:19,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:30:19,133 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:30:19,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:30:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:30:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:30:19,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:30:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:30:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:30:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:30:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:30:20,257 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:30:20,257 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:30:20,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:20 BoogieIcfgContainer [2019-11-06 22:30:20,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:30:20,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:30:20,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:30:20,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:30:20,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:18" (1/3) ... [2019-11-06 22:30:20,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5093881a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:20, skipping insertion in model container [2019-11-06 22:30:20,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:18" (2/3) ... [2019-11-06 22:30:20,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5093881a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:20, skipping insertion in model container [2019-11-06 22:30:20,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:20" (3/3) ... [2019-11-06 22:30:20,266 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label35.c [2019-11-06 22:30:20,276 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:30:20,283 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:30:20,294 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:30:20,318 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:30:20,318 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:30:20,318 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:30:20,318 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:30:20,319 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:30:20,319 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:30:20,319 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:30:20,319 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:30:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:30:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-06 22:30:20,351 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:20,352 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:20,354 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash 279627110, now seen corresponding path program 1 times [2019-11-06 22:30:20,366 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:20,366 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732140549] [2019-11-06 22:30:20,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:20,720 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 22:30:20,721 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732140549] [2019-11-06 22:30:20,722 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:20,723 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:20,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338194628] [2019-11-06 22:30:20,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:20,734 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:20,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:20,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:20,752 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:30:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:21,614 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:30:21,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:21,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-11-06 22:30:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:21,646 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:30:21,647 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:30:21,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:21,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:30:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:30:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:30:21,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-11-06 22:30:21,772 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 86 [2019-11-06 22:30:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:21,774 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-11-06 22:30:21,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-11-06 22:30:21,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 22:30:21,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:21,788 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:21,788 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:21,790 INFO L82 PathProgramCache]: Analyzing trace with hash -53773379, now seen corresponding path program 1 times [2019-11-06 22:30:21,790 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:21,791 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924202560] [2019-11-06 22:30:21,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:21,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924202560] [2019-11-06 22:30:21,953 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:21,953 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:30:21,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386620825] [2019-11-06 22:30:21,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:30:21,956 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:21,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:30:21,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:30:21,956 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-11-06 22:30:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:22,724 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-11-06 22:30:22,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:30:22,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-11-06 22:30:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:22,733 INFO L225 Difference]: With dead ends: 703 [2019-11-06 22:30:22,734 INFO L226 Difference]: Without dead ends: 431 [2019-11-06 22:30:22,735 INFO L630 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 [2019-11-06 22:30:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-11-06 22:30:22,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-11-06 22:30:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-11-06 22:30:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-11-06 22:30:22,767 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 96 [2019-11-06 22:30:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:22,767 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-11-06 22:30:22,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:30:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-11-06 22:30:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 22:30:22,769 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:22,769 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:22,770 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:22,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:22,770 INFO L82 PathProgramCache]: Analyzing trace with hash -24478849, now seen corresponding path program 1 times [2019-11-06 22:30:22,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:22,771 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555257883] [2019-11-06 22:30:22,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:22,867 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555257883] [2019-11-06 22:30:22,867 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:22,867 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:22,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587273364] [2019-11-06 22:30:22,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:22,868 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:22,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:22,869 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-11-06 22:30:23,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:23,403 INFO L93 Difference]: Finished difference Result 1241 states and 1783 transitions. [2019-11-06 22:30:23,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:23,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-11-06 22:30:23,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:23,409 INFO L225 Difference]: With dead ends: 1241 [2019-11-06 22:30:23,409 INFO L226 Difference]: Without dead ends: 828 [2019-11-06 22:30:23,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-11-06 22:30:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-11-06 22:30:23,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-11-06 22:30:23,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1098 transitions. [2019-11-06 22:30:23,444 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1098 transitions. Word has length 97 [2019-11-06 22:30:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:23,445 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1098 transitions. [2019-11-06 22:30:23,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1098 transitions. [2019-11-06 22:30:23,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:30:23,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:23,448 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:23,448 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1420356985, now seen corresponding path program 1 times [2019-11-06 22:30:23,449 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:23,449 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677650719] [2019-11-06 22:30:23,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:23,622 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677650719] [2019-11-06 22:30:23,622 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:23,623 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:30:23,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716204552] [2019-11-06 22:30:23,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:30:23,624 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:30:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:30:23,624 INFO L87 Difference]: Start difference. First operand 828 states and 1098 transitions. Second operand 6 states. [2019-11-06 22:30:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:24,420 INFO L93 Difference]: Finished difference Result 1678 states and 2251 transitions. [2019-11-06 22:30:24,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:30:24,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-11-06 22:30:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:24,426 INFO L225 Difference]: With dead ends: 1678 [2019-11-06 22:30:24,426 INFO L226 Difference]: Without dead ends: 856 [2019-11-06 22:30:24,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:30:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2019-11-06 22:30:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 846. [2019-11-06 22:30:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 846 states. [2019-11-06 22:30:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1095 transitions. [2019-11-06 22:30:24,456 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1095 transitions. Word has length 98 [2019-11-06 22:30:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:24,457 INFO L462 AbstractCegarLoop]: Abstraction has 846 states and 1095 transitions. [2019-11-06 22:30:24,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:30:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1095 transitions. [2019-11-06 22:30:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-06 22:30:24,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:24,460 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:30:24,460 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 53339990, now seen corresponding path program 1 times [2019-11-06 22:30:24,461 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:24,461 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822478154] [2019-11-06 22:30:24,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:30:24,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822478154] [2019-11-06 22:30:24,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882031728] [2019-11-06 22:30:24,522 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 22:30:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:24,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:30:24,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:30:24,794 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:30:24,883 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:30:24,883 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-11-06 22:30:24,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234284425] [2019-11-06 22:30:24,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:30:24,884 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:24,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:30:24,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:30:24,885 INFO L87 Difference]: Start difference. First operand 846 states and 1095 transitions. Second operand 5 states. [2019-11-06 22:30:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:25,612 INFO L93 Difference]: Finished difference Result 1710 states and 2261 transitions. [2019-11-06 22:30:25,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:30:25,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2019-11-06 22:30:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:25,618 INFO L225 Difference]: With dead ends: 1710 [2019-11-06 22:30:25,618 INFO L226 Difference]: Without dead ends: 870 [2019-11-06 22:30:25,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:30:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2019-11-06 22:30:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2019-11-06 22:30:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2019-11-06 22:30:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1044 transitions. [2019-11-06 22:30:25,646 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1044 transitions. Word has length 107 [2019-11-06 22:30:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:25,647 INFO L462 AbstractCegarLoop]: Abstraction has 856 states and 1044 transitions. [2019-11-06 22:30:25,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:30:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1044 transitions. [2019-11-06 22:30:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 22:30:25,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:25,649 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:30:25,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:30:25,855 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash -579647982, now seen corresponding path program 1 times [2019-11-06 22:30:25,856 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:25,856 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417189863] [2019-11-06 22:30:25,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:25,937 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417189863] [2019-11-06 22:30:25,937 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893956486] [2019-11-06 22:30:25,937 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 22:30:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:26,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 22:30:26,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:26,110 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:26,340 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2019-11-06 22:30:26,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:26,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:26,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:26,497 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [680332048] [2019-11-06 22:30:26,503 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 110 [2019-11-06 22:30:26,553 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:30:26,553 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)