/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/Problem10_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:44:19,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:44:19,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:44:19,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:44:19,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:44:19,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:44:19,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:44:19,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:44:19,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:44:19,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:44:19,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:44:19,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:44:19,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:44:19,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:44:19,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:44:19,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:44:19,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:44:19,964 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 22:44:19,992 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:44:19,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:44:20,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:44:20,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:44:20,003 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:44:20,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:44:20,003 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:44:20,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:44:20,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:44:20,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:44:20,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:44:20,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:44:20,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:44:20,004 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:44:20,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:44:20,005 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:44:20,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:44:20,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:44:20,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:44:20,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:44:20,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:44:20,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:44:20,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:44:20,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:44:20,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:44:20,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:44:20,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:44:20,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:44:20,008 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 22:44:20,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:44:20,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:44:20,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:44:20,306 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:44:20,306 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:44:20,307 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label50.c [2019-11-06 22:44:20,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d28c3aa8/c2fc41cbcb224d5db216bbf8e225d045/FLAG46ca65ced [2019-11-06 22:44:20,958 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:44:20,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label50.c [2019-11-06 22:44:20,977 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d28c3aa8/c2fc41cbcb224d5db216bbf8e225d045/FLAG46ca65ced [2019-11-06 22:44:21,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d28c3aa8/c2fc41cbcb224d5db216bbf8e225d045 [2019-11-06 22:44:21,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:44:21,211 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:44:21,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:21,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:44:21,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:44:21,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:21,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bcaca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21, skipping insertion in model container [2019-11-06 22:44:21,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:21,232 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:44:21,290 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:44:21,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:21,810 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:44:21,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:21,966 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:44:21,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21 WrapperNode [2019-11-06 22:44:21,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:21,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:44:21,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:44:21,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:44:21,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:21,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:21,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:21,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:22,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:22,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:22,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (1/1) ... [2019-11-06 22:44:22,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:44:22,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:44:22,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:44:22,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:44:22,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (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 22:44:22,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:44:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:44:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:44:22,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:44:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:44:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:44:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:44:22,144 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:44:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:44:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:44:22,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:44:23,453 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:44:23,453 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:44:23,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:23 BoogieIcfgContainer [2019-11-06 22:44:23,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:44:23,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:44:23,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:44:23,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:44:23,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:21" (1/3) ... [2019-11-06 22:44:23,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f8a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:23, skipping insertion in model container [2019-11-06 22:44:23,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:21" (2/3) ... [2019-11-06 22:44:23,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f8a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:23, skipping insertion in model container [2019-11-06 22:44:23,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:23" (3/3) ... [2019-11-06 22:44:23,463 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label50.c [2019-11-06 22:44:23,474 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:44:23,482 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:44:23,495 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:44:23,532 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:44:23,533 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:44:23,533 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:44:23,533 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:44:23,535 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:44:23,535 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:44:23,535 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:44:23,535 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:44:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:44:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 22:44:23,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:23,564 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:23,566 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:23,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash 397772918, now seen corresponding path program 1 times [2019-11-06 22:44:23,580 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:23,580 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969280003] [2019-11-06 22:44:23,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:23,786 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 22:44:23,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969280003] [2019-11-06 22:44:23,788 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:23,788 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:44:23,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120205895] [2019-11-06 22:44:23,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:44:23,797 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:23,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:44:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:44:23,814 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:44:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:24,805 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:44:24,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:44:24,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 22:44:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:24,829 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:44:24,829 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:44:24,840 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 22:44:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:44:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:44:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:44:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-11-06 22:44:24,950 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 15 [2019-11-06 22:44:24,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:24,951 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-11-06 22:44:24,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:44:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-11-06 22:44:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:44:24,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:24,955 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] [2019-11-06 22:44:24,955 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:24,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1068134291, now seen corresponding path program 1 times [2019-11-06 22:44:24,956 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:24,956 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759079009] [2019-11-06 22:44:24,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:25,214 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 22:44:25,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759079009] [2019-11-06 22:44:25,215 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:25,215 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:25,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058704907] [2019-11-06 22:44:25,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:25,218 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:25,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:25,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:25,220 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-11-06 22:44:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:26,081 INFO L93 Difference]: Finished difference Result 741 states and 1136 transitions. [2019-11-06 22:44:26,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:26,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-11-06 22:44:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:26,085 INFO L225 Difference]: With dead ends: 741 [2019-11-06 22:44:26,086 INFO L226 Difference]: Without dead ends: 453 [2019-11-06 22:44:26,087 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 22:44:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-11-06 22:44:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-11-06 22:44:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-11-06 22:44:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-11-06 22:44:26,116 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 88 [2019-11-06 22:44:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:26,117 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-11-06 22:44:26,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-11-06 22:44:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-06 22:44:26,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:26,120 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] [2019-11-06 22:44:26,121 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1363459929, now seen corresponding path program 1 times [2019-11-06 22:44:26,121 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:26,122 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316537131] [2019-11-06 22:44:26,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:26,217 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 22:44:26,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316537131] [2019-11-06 22:44:26,217 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:26,218 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:44:26,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562330433] [2019-11-06 22:44:26,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:44:26,219 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:26,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:44:26,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:44:26,219 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 4 states. [2019-11-06 22:44:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:27,242 INFO L93 Difference]: Finished difference Result 1611 states and 2315 transitions. [2019-11-06 22:44:27,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:44:27,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2019-11-06 22:44:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:27,258 INFO L225 Difference]: With dead ends: 1611 [2019-11-06 22:44:27,259 INFO L226 Difference]: Without dead ends: 1172 [2019-11-06 22:44:27,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:44:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2019-11-06 22:44:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1172. [2019-11-06 22:44:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2019-11-06 22:44:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1554 transitions. [2019-11-06 22:44:27,334 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1554 transitions. Word has length 94 [2019-11-06 22:44:27,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:27,335 INFO L462 AbstractCegarLoop]: Abstraction has 1172 states and 1554 transitions. [2019-11-06 22:44:27,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:44:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1554 transitions. [2019-11-06 22:44:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 22:44:27,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:27,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:27,343 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:27,344 INFO L82 PathProgramCache]: Analyzing trace with hash -396385674, now seen corresponding path program 1 times [2019-11-06 22:44:27,344 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:27,344 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364433839] [2019-11-06 22:44:27,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:27,573 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 22:44:27,574 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364433839] [2019-11-06 22:44:27,574 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:27,574 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:27,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901479106] [2019-11-06 22:44:27,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:27,576 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:27,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:27,576 INFO L87 Difference]: Start difference. First operand 1172 states and 1554 transitions. Second operand 6 states. [2019-11-06 22:44:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:28,410 INFO L93 Difference]: Finished difference Result 2372 states and 3192 transitions. [2019-11-06 22:44:28,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:28,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2019-11-06 22:44:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:28,418 INFO L225 Difference]: With dead ends: 2372 [2019-11-06 22:44:28,419 INFO L226 Difference]: Without dead ends: 1206 [2019-11-06 22:44:28,421 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 22:44:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2019-11-06 22:44:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1051. [2019-11-06 22:44:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-11-06 22:44:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1334 transitions. [2019-11-06 22:44:28,489 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1334 transitions. Word has length 151 [2019-11-06 22:44:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:28,490 INFO L462 AbstractCegarLoop]: Abstraction has 1051 states and 1334 transitions. [2019-11-06 22:44:28,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1334 transitions. [2019-11-06 22:44:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:44:28,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:28,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:28,493 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1539466530, now seen corresponding path program 1 times [2019-11-06 22:44:28,494 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:28,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102339567] [2019-11-06 22:44:28,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:28,662 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 22:44:28,663 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102339567] [2019-11-06 22:44:28,663 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:28,663 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:44:28,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264723188] [2019-11-06 22:44:28,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:44:28,664 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:28,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:44:28,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:44:28,665 INFO L87 Difference]: Start difference. First operand 1051 states and 1334 transitions. Second operand 6 states. [2019-11-06 22:44:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:29,440 INFO L93 Difference]: Finished difference Result 2400 states and 3096 transitions. [2019-11-06 22:44:29,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:29,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-11-06 22:44:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:29,448 INFO L225 Difference]: With dead ends: 2400 [2019-11-06 22:44:29,448 INFO L226 Difference]: Without dead ends: 1355 [2019-11-06 22:44:29,451 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 22:44:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-11-06 22:44:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1200. [2019-11-06 22:44:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-11-06 22:44:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1479 transitions. [2019-11-06 22:44:29,513 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1479 transitions. Word has length 157 [2019-11-06 22:44:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:29,513 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 1479 transitions. [2019-11-06 22:44:29,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:44:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1479 transitions. [2019-11-06 22:44:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 22:44:29,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:29,517 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:44:29,517 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash 539367001, now seen corresponding path program 1 times [2019-11-06 22:44:29,518 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:29,518 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290650881] [2019-11-06 22:44:29,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 22:44:29,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290650881] [2019-11-06 22:44:29,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375008472] [2019-11-06 22:44:29,823 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 22:44:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:29,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:44:29,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:30,096 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:30,257 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1326009930] [2019-11-06 22:44:30,263 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 231 [2019-11-06 22:44:30,324 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:44:30,324 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:44:42,268 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.