/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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:30:46,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:30:46,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:30:46,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:30:46,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:30:46,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:30:46,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:30:46,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:30:46,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:30:46,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:30:46,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:30:46,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:30:46,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:30:46,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:30:46,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:30:46,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:30:46,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:30:46,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:30:46,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:30:46,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:30:46,646 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 22:30:46,679 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:30:46,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:30:46,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:30:46,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:30:46,683 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:30:46,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:30:46,684 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:30:46,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:30:46,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:30:46,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:30:46,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:30:46,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:30:46,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:30:46,688 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:30:46,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:30:46,689 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:30:46,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:30:46,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:30:46,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:30:46,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:30:46,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:30:46,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:30:46,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:30:46,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:30:46,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:30:46,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:30:46,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:30:46,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:30:46,691 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 22:30:46,939 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:30:46,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:30:46,961 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:30:46,962 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:30:46,963 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:30:46,963 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2019-11-06 22:30:47,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b285096e/8acc4ea804284115892aab8effdd0d5b/FLAGc4c9c0aa7 [2019-11-06 22:30:47,509 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:30:47,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label38.c [2019-11-06 22:30:47,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b285096e/8acc4ea804284115892aab8effdd0d5b/FLAGc4c9c0aa7 [2019-11-06 22:30:47,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b285096e/8acc4ea804284115892aab8effdd0d5b [2019-11-06 22:30:47,856 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:30:47,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:30:47,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:47,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:30:47,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:30:47,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:47" (1/1) ... [2019-11-06 22:30:47,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@adc654d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:47, skipping insertion in model container [2019-11-06 22:30:47,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:47" (1/1) ... [2019-11-06 22:30:47,873 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:30:47,923 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:30:48,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:48,417 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:30:48,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:30:48,603 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:30:48,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48 WrapperNode [2019-11-06 22:30:48,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:30:48,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:30:48,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:30:48,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:30:48,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (1/1) ... [2019-11-06 22:30:48,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (1/1) ... [2019-11-06 22:30:48,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (1/1) ... [2019-11-06 22:30:48,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (1/1) ... [2019-11-06 22:30:48,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (1/1) ... [2019-11-06 22:30:48,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (1/1) ... [2019-11-06 22:30:48,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (1/1) ... [2019-11-06 22:30:48,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:30:48,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:30:48,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:30:48,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:30:48,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (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 22:30:48,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:30:48,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:30:48,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:30:48,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:30:48,855 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:30:48,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:30:48,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:30:48,858 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:30:48,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:30:48,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:30:48,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:30:50,208 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:30:50,208 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:30:50,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:50 BoogieIcfgContainer [2019-11-06 22:30:50,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:30:50,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:30:50,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:30:50,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:30:50,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:47" (1/3) ... [2019-11-06 22:30:50,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7a3559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:50, skipping insertion in model container [2019-11-06 22:30:50,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:48" (2/3) ... [2019-11-06 22:30:50,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7a3559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:50, skipping insertion in model container [2019-11-06 22:30:50,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:50" (3/3) ... [2019-11-06 22:30:50,225 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label38.c [2019-11-06 22:30:50,239 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:30:50,250 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:30:50,262 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:30:50,299 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:30:50,299 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:30:50,300 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:30:50,301 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:30:50,301 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:30:50,301 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:30:50,301 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:30:50,302 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:30:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:30:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 22:30:50,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:50,363 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, 1, 1] [2019-11-06 22:30:50,365 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1861146994, now seen corresponding path program 1 times [2019-11-06 22:30:50,377 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:50,378 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908730085] [2019-11-06 22:30:50,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:50,810 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 22:30:50,810 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908730085] [2019-11-06 22:30:50,812 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:50,812 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:50,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456963650] [2019-11-06 22:30:50,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:50,823 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:50,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:50,841 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:30:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:51,811 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:30:51,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:51,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-11-06 22:30:51,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:51,837 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:30:51,837 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:30:51,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 22:30:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:30:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:30:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:30:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:30:51,945 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 88 [2019-11-06 22:30:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:51,946 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:30:51,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:30:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:30:51,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:51,951 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, 1, 1] [2019-11-06 22:30:51,952 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:51,952 INFO L82 PathProgramCache]: Analyzing trace with hash -136469723, now seen corresponding path program 1 times [2019-11-06 22:30:51,952 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:51,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701437647] [2019-11-06 22:30:51,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:52,072 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 22:30:52,073 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701437647] [2019-11-06 22:30:52,074 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:52,074 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:30:52,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781595429] [2019-11-06 22:30:52,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:30:52,076 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:30:52,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:30:52,077 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:30:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:52,922 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:30:52,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:30:52,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-11-06 22:30:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:52,932 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:30:52,932 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:30:52,933 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 22:30:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:30:52,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:30:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:30:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-11-06 22:30:52,975 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 98 [2019-11-06 22:30:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:52,975 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-11-06 22:30:52,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:30:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-11-06 22:30:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 22:30:52,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:52,980 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] [2019-11-06 22:30:52,980 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash -2049197465, now seen corresponding path program 1 times [2019-11-06 22:30:52,981 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:52,981 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577843113] [2019-11-06 22:30:52,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:53,139 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 22:30:53,140 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577843113] [2019-11-06 22:30:53,140 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:53,140 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:53,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771081979] [2019-11-06 22:30:53,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:53,141 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:53,142 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 3 states. [2019-11-06 22:30:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:53,645 INFO L93 Difference]: Finished difference Result 1513 states and 2177 transitions. [2019-11-06 22:30:53,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:53,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-11-06 22:30:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:53,652 INFO L225 Difference]: With dead ends: 1513 [2019-11-06 22:30:53,653 INFO L226 Difference]: Without dead ends: 963 [2019-11-06 22:30:53,654 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 22:30:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2019-11-06 22:30:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2019-11-06 22:30:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2019-11-06 22:30:53,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1271 transitions. [2019-11-06 22:30:53,707 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1271 transitions. Word has length 99 [2019-11-06 22:30:53,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:53,708 INFO L462 AbstractCegarLoop]: Abstraction has 963 states and 1271 transitions. [2019-11-06 22:30:53,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1271 transitions. [2019-11-06 22:30:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 22:30:53,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:53,713 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, 1, 1] [2019-11-06 22:30:53,714 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash -836397599, now seen corresponding path program 1 times [2019-11-06 22:30:53,714 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:53,715 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457829245] [2019-11-06 22:30:53,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:53,815 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 22:30:53,815 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457829245] [2019-11-06 22:30:53,815 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:53,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:30:53,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781405977] [2019-11-06 22:30:53,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:30:53,818 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:53,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:30:53,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:30:53,818 INFO L87 Difference]: Start difference. First operand 963 states and 1271 transitions. Second operand 3 states. [2019-11-06 22:30:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:54,341 INFO L93 Difference]: Finished difference Result 2462 states and 3326 transitions. [2019-11-06 22:30:54,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:30:54,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-11-06 22:30:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:54,350 INFO L225 Difference]: With dead ends: 2462 [2019-11-06 22:30:54,350 INFO L226 Difference]: Without dead ends: 1505 [2019-11-06 22:30:54,352 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 22:30:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2019-11-06 22:30:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1505. [2019-11-06 22:30:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1505 states. [2019-11-06 22:30:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1971 transitions. [2019-11-06 22:30:54,402 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1971 transitions. Word has length 100 [2019-11-06 22:30:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:54,403 INFO L462 AbstractCegarLoop]: Abstraction has 1505 states and 1971 transitions. [2019-11-06 22:30:54,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:30:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1971 transitions. [2019-11-06 22:30:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:30:54,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:54,409 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:54,409 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:54,410 INFO L82 PathProgramCache]: Analyzing trace with hash -273287469, now seen corresponding path program 1 times [2019-11-06 22:30:54,410 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:54,410 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281445690] [2019-11-06 22:30:54,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:54,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281445690] [2019-11-06 22:30:54,647 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:30:54,647 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:30:54,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435473370] [2019-11-06 22:30:54,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:30:54,649 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:30:54,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:30:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:30:54,649 INFO L87 Difference]: Start difference. First operand 1505 states and 1971 transitions. Second operand 6 states. [2019-11-06 22:30:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:30:55,435 INFO L93 Difference]: Finished difference Result 3590 states and 4771 transitions. [2019-11-06 22:30:55,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:30:55,435 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-06 22:30:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:30:55,446 INFO L225 Difference]: With dead ends: 3590 [2019-11-06 22:30:55,446 INFO L226 Difference]: Without dead ends: 1954 [2019-11-06 22:30:55,450 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 22:30:55,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2019-11-06 22:30:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1674. [2019-11-06 22:30:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-11-06 22:30:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2171 transitions. [2019-11-06 22:30:55,515 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2171 transitions. Word has length 141 [2019-11-06 22:30:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:30:55,516 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2171 transitions. [2019-11-06 22:30:55,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:30:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2171 transitions. [2019-11-06 22:30:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:30:55,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:30:55,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:55,523 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:30:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:30:55,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1345296538, now seen corresponding path program 1 times [2019-11-06 22:30:55,524 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:30:55,524 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073142133] [2019-11-06 22:30:55,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:30:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:55,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073142133] [2019-11-06 22:30:55,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195603492] [2019-11-06 22:30:55,733 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 22:30:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:30:55,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 22:30:55,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:30:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:56,062 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:30:56,311 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-11-06 22:30:56,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:30:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:30:56,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [926159483] [2019-11-06 22:30:56,606 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 153 [2019-11-06 22:30:56,661 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:30:56,662 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)