/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_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:00,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:00,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:00,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:54:00,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:00,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:00,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:00,957 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 22:54:00,978 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:00,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:00,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:00,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:00,981 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:00,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:00,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:00,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:00,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:00,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:00,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:00,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:00,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:00,984 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:00,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:00,984 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:00,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:00,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:00,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:00,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:00,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:00,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:00,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:00,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:00,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:00,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:00,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:00,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:00,987 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 22:54:01,260 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:01,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:01,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:01,277 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:01,278 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:01,278 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label12.c [2019-11-06 22:54:01,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b65e7615/8eb528e2bdb3445298b02041e0fc34c9/FLAG941aeb84f [2019-11-06 22:54:01,901 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:01,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label12.c [2019-11-06 22:54:01,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b65e7615/8eb528e2bdb3445298b02041e0fc34c9/FLAG941aeb84f [2019-11-06 22:54:02,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b65e7615/8eb528e2bdb3445298b02041e0fc34c9 [2019-11-06 22:54:02,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:02,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:02,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:02,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:02,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:02,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:02" (1/1) ... [2019-11-06 22:54:02,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba9d4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:02, skipping insertion in model container [2019-11-06 22:54:02,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:02" (1/1) ... [2019-11-06 22:54:02,190 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:02,262 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:03,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:03,124 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:03,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:03,693 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:03,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03 WrapperNode [2019-11-06 22:54:03,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:03,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:03,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:03,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:03,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (1/1) ... [2019-11-06 22:54:03,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (1/1) ... [2019-11-06 22:54:03,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (1/1) ... [2019-11-06 22:54:03,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (1/1) ... [2019-11-06 22:54:03,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (1/1) ... [2019-11-06 22:54:03,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (1/1) ... [2019-11-06 22:54:03,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (1/1) ... [2019-11-06 22:54:03,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:03,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:03,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:03,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:03,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (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 22:54:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:03,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:03,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:03,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:03,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:03,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:06,245 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:06,250 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:06,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:06 BoogieIcfgContainer [2019-11-06 22:54:06,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:06,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:06,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:06,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:06,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:02" (1/3) ... [2019-11-06 22:54:06,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17018eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:06, skipping insertion in model container [2019-11-06 22:54:06,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:03" (2/3) ... [2019-11-06 22:54:06,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17018eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:06, skipping insertion in model container [2019-11-06 22:54:06,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:06" (3/3) ... [2019-11-06 22:54:06,266 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label12.c [2019-11-06 22:54:06,279 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:06,292 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:06,304 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:06,350 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:06,350 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:06,350 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:06,351 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:06,351 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:06,351 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:06,351 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:06,351 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 22:54:06,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:06,399 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] [2019-11-06 22:54:06,401 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:06,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1524372618, now seen corresponding path program 1 times [2019-11-06 22:54:06,419 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:06,419 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480590332] [2019-11-06 22:54:06,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:06,725 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 22:54:06,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480590332] [2019-11-06 22:54:06,726 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:06,726 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:06,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064665964] [2019-11-06 22:54:06,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:06,734 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:06,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:06,752 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:09,044 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:09,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:09,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-11-06 22:54:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:09,070 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:09,070 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:09,080 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 22:54:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-11-06 22:54:09,186 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 45 [2019-11-06 22:54:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:09,187 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-11-06 22:54:09,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-11-06 22:54:09,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 22:54:09,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:09,194 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:09,194 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:09,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1650431575, now seen corresponding path program 1 times [2019-11-06 22:54:09,195 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:09,195 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917156384] [2019-11-06 22:54:09,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:09,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917156384] [2019-11-06 22:54:09,405 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:09,406 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:54:09,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658530736] [2019-11-06 22:54:09,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:09,408 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:54:09,409 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-11-06 22:54:12,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:12,556 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-11-06 22:54:12,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:12,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2019-11-06 22:54:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:12,570 INFO L225 Difference]: With dead ends: 2066 [2019-11-06 22:54:12,571 INFO L226 Difference]: Without dead ends: 1390 [2019-11-06 22:54:12,574 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 22:54:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-11-06 22:54:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-11-06 22:54:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-11-06 22:54:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-11-06 22:54:12,646 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 114 [2019-11-06 22:54:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:12,647 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-11-06 22:54:12,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:54:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-11-06 22:54:12,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 22:54:12,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:12,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:12,651 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:12,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1950133058, now seen corresponding path program 1 times [2019-11-06 22:54:12,652 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:12,652 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71598560] [2019-11-06 22:54:12,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:12,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71598560] [2019-11-06 22:54:12,915 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:12,915 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:12,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705865707] [2019-11-06 22:54:12,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:12,916 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:12,917 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-11-06 22:54:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:15,940 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-11-06 22:54:15,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:15,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-06 22:54:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:15,958 INFO L225 Difference]: With dead ends: 3472 [2019-11-06 22:54:15,959 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 22:54:15,963 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 22:54:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 22:54:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-11-06 22:54:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:54:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-11-06 22:54:16,057 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 143 [2019-11-06 22:54:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:16,058 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-11-06 22:54:16,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-11-06 22:54:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 22:54:16,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:16,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:16,070 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:16,070 INFO L82 PathProgramCache]: Analyzing trace with hash 903433606, now seen corresponding path program 1 times [2019-11-06 22:54:16,070 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:16,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113300719] [2019-11-06 22:54:16,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:16,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113300719] [2019-11-06 22:54:16,328 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:16,329 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:16,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763428682] [2019-11-06 22:54:16,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:16,331 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:16,332 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-11-06 22:54:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:19,111 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-11-06 22:54:19,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:19,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-11-06 22:54:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:19,129 INFO L225 Difference]: With dead ends: 5241 [2019-11-06 22:54:19,129 INFO L226 Difference]: Without dead ends: 3166 [2019-11-06 22:54:19,134 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 22:54:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-11-06 22:54:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-11-06 22:54:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-11-06 22:54:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-11-06 22:54:19,216 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 161 [2019-11-06 22:54:19,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:19,220 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-11-06 22:54:19,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-11-06 22:54:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-11-06 22:54:19,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:19,228 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:19,228 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash 582436338, now seen corresponding path program 1 times [2019-11-06 22:54:19,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:19,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694940915] [2019-11-06 22:54:19,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 104 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:19,461 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694940915] [2019-11-06 22:54:19,462 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458024466] [2019-11-06 22:54:19,462 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 22:54:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:19,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:19,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:54:19,768 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:54:19,865 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:54:19,865 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-06 22:54:19,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073571565] [2019-11-06 22:54:19,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:19,868 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:19,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:54:19,870 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-11-06 22:54:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:24,916 INFO L93 Difference]: Finished difference Result 8317 states and 11073 transitions. [2019-11-06 22:54:24,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:24,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2019-11-06 22:54:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:24,955 INFO L225 Difference]: With dead ends: 8317 [2019-11-06 22:54:24,955 INFO L226 Difference]: Without dead ends: 5183 [2019-11-06 22:54:24,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:54:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2019-11-06 22:54:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 4842. [2019-11-06 22:54:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4842 states. [2019-11-06 22:54:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 6246 transitions. [2019-11-06 22:54:25,091 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 6246 transitions. Word has length 243 [2019-11-06 22:54:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:25,092 INFO L462 AbstractCegarLoop]: Abstraction has 4842 states and 6246 transitions. [2019-11-06 22:54:25,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 6246 transitions. [2019-11-06 22:54:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2019-11-06 22:54:25,107 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:25,107 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:25,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:25,313 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash 948882286, now seen corresponding path program 1 times [2019-11-06 22:54:25,314 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:25,315 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915012168] [2019-11-06 22:54:25,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 231 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:54:25,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915012168] [2019-11-06 22:54:25,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536057045] [2019-11-06 22:54:25,798 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 22:54:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:25,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:25,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 432 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-06 22:54:26,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 231 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:54:26,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [838265640] [2019-11-06 22:54:26,473 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 488 [2019-11-06 22:54:26,529 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:54:26,529 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)