/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/Problem02_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:32:44,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:32:44,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:32:44,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:32:44,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:32:44,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:32:44,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:32:44,732 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 22:32:44,751 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:32:44,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:32:44,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:32:44,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:32:44,753 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:32:44,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:32:44,754 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:32:44,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:32:44,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:32:44,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:32:44,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:32:44,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:32:44,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:32:44,756 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:32:44,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:32:44,756 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:32:44,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:32:44,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:32:44,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:32:44,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:32:44,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:32:44,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:32:44,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:32:44,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:32:44,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:32:44,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:32:44,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:32:44,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:32:44,759 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 22:32:45,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:32:45,040 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:32:45,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:32:45,044 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:32:45,045 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:32:45,046 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label03.c [2019-11-06 22:32:45,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a1f4182c/e6d5937d5d304532bc1c20883292bdc7/FLAGa5f54779c [2019-11-06 22:32:45,636 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:32:45,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label03.c [2019-11-06 22:32:45,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a1f4182c/e6d5937d5d304532bc1c20883292bdc7/FLAGa5f54779c [2019-11-06 22:32:45,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a1f4182c/e6d5937d5d304532bc1c20883292bdc7 [2019-11-06 22:32:45,946 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:32:45,947 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:32:45,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:32:45,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:32:45,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:32:45,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:45" (1/1) ... [2019-11-06 22:32:45,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fac3e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:45, skipping insertion in model container [2019-11-06 22:32:45,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:32:45" (1/1) ... [2019-11-06 22:32:45,963 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:32:46,021 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:32:46,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:32:46,538 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:32:46,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:32:46,672 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:32:46,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46 WrapperNode [2019-11-06 22:32:46,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:32:46,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:32:46,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:32:46,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:32:46,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (1/1) ... [2019-11-06 22:32:46,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (1/1) ... [2019-11-06 22:32:46,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (1/1) ... [2019-11-06 22:32:46,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (1/1) ... [2019-11-06 22:32:46,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (1/1) ... [2019-11-06 22:32:46,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (1/1) ... [2019-11-06 22:32:46,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (1/1) ... [2019-11-06 22:32:46,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:32:46,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:32:46,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:32:46,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:32:46,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (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 22:32:46,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:32:46,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:32:46,884 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:32:46,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:32:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:32:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:32:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:32:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:32:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:32:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:32:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:32:48,085 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:32:48,088 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:32:48,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:48 BoogieIcfgContainer [2019-11-06 22:32:48,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:32:48,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:32:48,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:32:48,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:32:48,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:32:45" (1/3) ... [2019-11-06 22:32:48,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7402dd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:48, skipping insertion in model container [2019-11-06 22:32:48,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:32:46" (2/3) ... [2019-11-06 22:32:48,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7402dd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:32:48, skipping insertion in model container [2019-11-06 22:32:48,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:32:48" (3/3) ... [2019-11-06 22:32:48,106 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label03.c [2019-11-06 22:32:48,119 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:32:48,128 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:32:48,140 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:32:48,184 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:32:48,184 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:32:48,184 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:32:48,184 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:32:48,185 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:32:48,185 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:32:48,186 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:32:48,186 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:32:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:32:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 22:32:48,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:48,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:32:48,266 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:48,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1255491721, now seen corresponding path program 1 times [2019-11-06 22:32:48,287 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:48,287 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820391784] [2019-11-06 22:32:48,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:48,992 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 22:32:48,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820391784] [2019-11-06 22:32:48,995 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:48,995 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:32:48,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018062129] [2019-11-06 22:32:49,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:32:49,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:49,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:32:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:32:49,028 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 4 states. [2019-11-06 22:32:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:50,339 INFO L93 Difference]: Finished difference Result 784 states and 1369 transitions. [2019-11-06 22:32:50,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:32:50,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-11-06 22:32:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:50,359 INFO L225 Difference]: With dead ends: 784 [2019-11-06 22:32:50,359 INFO L226 Difference]: Without dead ends: 472 [2019-11-06 22:32:50,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 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 22:32:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-11-06 22:32:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 321. [2019-11-06 22:32:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:32:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 468 transitions. [2019-11-06 22:32:50,437 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 468 transitions. Word has length 135 [2019-11-06 22:32:50,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:50,438 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 468 transitions. [2019-11-06 22:32:50,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:32:50,439 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 468 transitions. [2019-11-06 22:32:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-06 22:32:50,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:50,444 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:32:50,444 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:50,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1491134706, now seen corresponding path program 1 times [2019-11-06 22:32:50,445 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:50,445 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456946576] [2019-11-06 22:32:50,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:50,768 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456946576] [2019-11-06 22:32:50,769 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:50,769 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:32:50,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474324164] [2019-11-06 22:32:50,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:32:50,775 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:50,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:32:50,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:50,777 INFO L87 Difference]: Start difference. First operand 321 states and 468 transitions. Second operand 5 states. [2019-11-06 22:32:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:51,508 INFO L93 Difference]: Finished difference Result 723 states and 1095 transitions. [2019-11-06 22:32:51,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:32:51,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-11-06 22:32:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:51,512 INFO L225 Difference]: With dead ends: 723 [2019-11-06 22:32:51,513 INFO L226 Difference]: Without dead ends: 321 [2019-11-06 22:32:51,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-11-06 22:32:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2019-11-06 22:32:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:32:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 464 transitions. [2019-11-06 22:32:51,537 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 464 transitions. Word has length 143 [2019-11-06 22:32:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:51,537 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 464 transitions. [2019-11-06 22:32:51,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:32:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 464 transitions. [2019-11-06 22:32:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-06 22:32:51,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:51,540 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:32:51,540 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:51,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1623037980, now seen corresponding path program 1 times [2019-11-06 22:32:51,541 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:51,541 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879710578] [2019-11-06 22:32:51,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:51,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879710578] [2019-11-06 22:32:51,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:51,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:32:51,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643266321] [2019-11-06 22:32:51,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:32:51,650 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:51,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:32:51,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:32:51,651 INFO L87 Difference]: Start difference. First operand 321 states and 464 transitions. Second operand 6 states. [2019-11-06 22:32:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:52,543 INFO L93 Difference]: Finished difference Result 954 states and 1409 transitions. [2019-11-06 22:32:52,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:32:52,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-11-06 22:32:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:52,548 INFO L225 Difference]: With dead ends: 954 [2019-11-06 22:32:52,548 INFO L226 Difference]: Without dead ends: 639 [2019-11-06 22:32:52,549 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 22:32:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-11-06 22:32:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2019-11-06 22:32:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-11-06 22:32:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions. [2019-11-06 22:32:52,583 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 155 [2019-11-06 22:32:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:52,584 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 886 transitions. [2019-11-06 22:32:52,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:32:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions. [2019-11-06 22:32:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 22:32:52,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:52,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:32:52,588 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1037502027, now seen corresponding path program 1 times [2019-11-06 22:32:52,588 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:52,589 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619915379] [2019-11-06 22:32:52,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:52,926 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619915379] [2019-11-06 22:32:52,926 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:52,926 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:32:52,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266621078] [2019-11-06 22:32:52,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:32:52,930 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:52,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:32:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:52,931 INFO L87 Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 5 states. [2019-11-06 22:32:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:53,572 INFO L93 Difference]: Finished difference Result 1334 states and 1936 transitions. [2019-11-06 22:32:53,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:32:53,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2019-11-06 22:32:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:53,577 INFO L225 Difference]: With dead ends: 1334 [2019-11-06 22:32:53,577 INFO L226 Difference]: Without dead ends: 628 [2019-11-06 22:32:53,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-11-06 22:32:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2019-11-06 22:32:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-11-06 22:32:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 874 transitions. [2019-11-06 22:32:53,603 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 874 transitions. Word has length 159 [2019-11-06 22:32:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:53,603 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 874 transitions. [2019-11-06 22:32:53,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:32:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 874 transitions. [2019-11-06 22:32:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 22:32:53,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:53,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:32:53,608 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:53,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:53,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1950441223, now seen corresponding path program 1 times [2019-11-06 22:32:53,608 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:53,609 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445823101] [2019-11-06 22:32:53,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:53,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445823101] [2019-11-06 22:32:53,887 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:32:53,887 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:32:53,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229026369] [2019-11-06 22:32:53,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:32:53,889 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:32:53,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:32:53,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:53,889 INFO L87 Difference]: Start difference. First operand 628 states and 874 transitions. Second operand 5 states. [2019-11-06 22:32:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:32:54,484 INFO L93 Difference]: Finished difference Result 1336 states and 1909 transitions. [2019-11-06 22:32:54,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:32:54,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-11-06 22:32:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:32:54,489 INFO L225 Difference]: With dead ends: 1336 [2019-11-06 22:32:54,489 INFO L226 Difference]: Without dead ends: 628 [2019-11-06 22:32:54,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:32:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-11-06 22:32:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2019-11-06 22:32:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-11-06 22:32:54,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 856 transitions. [2019-11-06 22:32:54,510 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 856 transitions. Word has length 161 [2019-11-06 22:32:54,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:32:54,510 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 856 transitions. [2019-11-06 22:32:54,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:32:54,510 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 856 transitions. [2019-11-06 22:32:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-06 22:32:54,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:32:54,514 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:32:54,514 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:32:54,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:32:54,514 INFO L82 PathProgramCache]: Analyzing trace with hash -739640613, now seen corresponding path program 1 times [2019-11-06 22:32:54,515 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:32:54,515 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306726018] [2019-11-06 22:32:54,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:32:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:54,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306726018] [2019-11-06 22:32:54,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162433273] [2019-11-06 22:32:54,592 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 22:32:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:32:54,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:32:54,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:32:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:54,884 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:32:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:32:55,017 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [273388016] [2019-11-06 22:32:55,024 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 169 [2019-11-06 22:32:55,095 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:32:55,095 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)