/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/Problem15_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:52:35,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:52:35,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:52:35,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:52:36,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:52:36,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:52:36,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:52:36,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:52:36,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:52:36,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:52:36,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:52:36,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:52:36,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:52:36,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:52:36,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:52:36,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:52:36,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:52:36,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:52:36,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:52:36,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:52:36,070 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 22:52:36,090 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:52:36,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:52:36,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:52:36,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:52:36,093 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:52:36,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:52:36,094 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:52:36,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:52:36,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:52:36,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:52:36,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:52:36,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:52:36,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:52:36,096 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:52:36,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:52:36,097 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:52:36,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:52:36,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:52:36,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:52:36,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:52:36,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:52:36,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:52:36,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:52:36,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:52:36,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:52:36,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:52:36,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:52:36,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:52:36,099 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 22:52:36,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:52:36,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:52:36,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:52:36,424 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:52:36,425 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:52:36,425 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-11-06 22:52:36,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23cc3876/90842f21d5334a62b2b6366440b7fbb1/FLAG2e3cb1fb6 [2019-11-06 22:52:37,208 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:52:37,209 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label28.c [2019-11-06 22:52:37,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23cc3876/90842f21d5334a62b2b6366440b7fbb1/FLAG2e3cb1fb6 [2019-11-06 22:52:37,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23cc3876/90842f21d5334a62b2b6366440b7fbb1 [2019-11-06 22:52:37,347 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:52:37,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:52:37,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:37,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:52:37,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:52:37,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:37" (1/1) ... [2019-11-06 22:52:37,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4618a068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:37, skipping insertion in model container [2019-11-06 22:52:37,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:37" (1/1) ... [2019-11-06 22:52:37,366 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:52:37,458 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:52:38,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:38,444 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:52:38,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:52:38,835 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:52:38,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38 WrapperNode [2019-11-06 22:52:38,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:52:38,837 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:52:38,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:52:38,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:52:38,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (1/1) ... [2019-11-06 22:52:38,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (1/1) ... [2019-11-06 22:52:38,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (1/1) ... [2019-11-06 22:52:38,900 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (1/1) ... [2019-11-06 22:52:38,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (1/1) ... [2019-11-06 22:52:38,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (1/1) ... [2019-11-06 22:52:39,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (1/1) ... [2019-11-06 22:52:39,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:52:39,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:52:39,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:52:39,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:52:39,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (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 22:52:39,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:52:39,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:52:39,071 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:52:39,071 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:52:39,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:52:39,071 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:52:39,072 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:52:39,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:52:39,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:52:39,072 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:52:39,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:52:39,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:52:39,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:52:42,933 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:52:42,934 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:52:42,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:42 BoogieIcfgContainer [2019-11-06 22:52:42,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:52:42,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:52:42,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:52:42,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:52:42,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:37" (1/3) ... [2019-11-06 22:52:42,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160ad950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:42, skipping insertion in model container [2019-11-06 22:52:42,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:38" (2/3) ... [2019-11-06 22:52:42,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160ad950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:42, skipping insertion in model container [2019-11-06 22:52:42,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:42" (3/3) ... [2019-11-06 22:52:42,944 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label28.c [2019-11-06 22:52:42,954 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:52:42,964 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:52:42,976 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:52:43,008 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:52:43,008 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:52:43,009 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:52:43,009 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:52:43,009 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:52:43,009 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:52:43,009 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:52:43,009 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:52:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 22:52:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 22:52:43,047 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:43,048 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] [2019-11-06 22:52:43,050 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1729511136, now seen corresponding path program 1 times [2019-11-06 22:52:43,067 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:43,067 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818044512] [2019-11-06 22:52:43,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:43,392 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 22:52:43,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818044512] [2019-11-06 22:52:43,394 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:43,394 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:52:43,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936454918] [2019-11-06 22:52:43,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:52:43,404 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:43,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:52:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:52:43,422 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-11-06 22:52:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:46,505 INFO L93 Difference]: Finished difference Result 1191 states and 2149 transitions. [2019-11-06 22:52:46,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:52:46,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2019-11-06 22:52:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:46,547 INFO L225 Difference]: With dead ends: 1191 [2019-11-06 22:52:46,548 INFO L226 Difference]: Without dead ends: 692 [2019-11-06 22:52:46,560 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 22:52:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-11-06 22:52:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 690. [2019-11-06 22:52:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-11-06 22:52:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1154 transitions. [2019-11-06 22:52:46,672 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1154 transitions. Word has length 38 [2019-11-06 22:52:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:46,673 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1154 transitions. [2019-11-06 22:52:46,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:52:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1154 transitions. [2019-11-06 22:52:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-06 22:52:46,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:46,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:46,680 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:46,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1320950948, now seen corresponding path program 1 times [2019-11-06 22:52:46,681 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:46,681 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909814768] [2019-11-06 22:52:46,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:46,943 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909814768] [2019-11-06 22:52:46,943 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:46,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:52:46,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914790166] [2019-11-06 22:52:46,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:52:46,947 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:46,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:52:46,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:52:46,948 INFO L87 Difference]: Start difference. First operand 690 states and 1154 transitions. Second operand 6 states. [2019-11-06 22:52:51,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:51,545 INFO L93 Difference]: Finished difference Result 2057 states and 3487 transitions. [2019-11-06 22:52:51,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:52:51,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 111 [2019-11-06 22:52:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:51,558 INFO L225 Difference]: With dead ends: 2057 [2019-11-06 22:52:51,558 INFO L226 Difference]: Without dead ends: 1373 [2019-11-06 22:52:51,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:52:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2019-11-06 22:52:51,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1342. [2019-11-06 22:52:51,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2019-11-06 22:52:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2245 transitions. [2019-11-06 22:52:51,636 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2245 transitions. Word has length 111 [2019-11-06 22:52:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:51,637 INFO L462 AbstractCegarLoop]: Abstraction has 1342 states and 2245 transitions. [2019-11-06 22:52:51,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:52:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2245 transitions. [2019-11-06 22:52:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-06 22:52:51,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:51,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:51,641 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:51,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:51,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1532585933, now seen corresponding path program 1 times [2019-11-06 22:52:51,642 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:51,642 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912822631] [2019-11-06 22:52:51,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:51,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912822631] [2019-11-06 22:52:51,870 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:51,870 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:52:51,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412306119] [2019-11-06 22:52:51,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:52:51,873 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:52:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:52:51,874 INFO L87 Difference]: Start difference. First operand 1342 states and 2245 transitions. Second operand 5 states. [2019-11-06 22:52:56,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:52:56,464 INFO L93 Difference]: Finished difference Result 3990 states and 6801 transitions. [2019-11-06 22:52:56,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:52:56,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2019-11-06 22:52:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:52:56,494 INFO L225 Difference]: With dead ends: 3990 [2019-11-06 22:52:56,495 INFO L226 Difference]: Without dead ends: 2654 [2019-11-06 22:52:56,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:52:56,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2019-11-06 22:52:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2615. [2019-11-06 22:52:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2019-11-06 22:52:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3768 transitions. [2019-11-06 22:52:56,616 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3768 transitions. Word has length 114 [2019-11-06 22:52:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:52:56,618 INFO L462 AbstractCegarLoop]: Abstraction has 2615 states and 3768 transitions. [2019-11-06 22:52:56,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:52:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3768 transitions. [2019-11-06 22:52:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:52:56,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:52:56,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:56,627 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:52:56,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:52:56,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1482212639, now seen corresponding path program 1 times [2019-11-06 22:52:56,627 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:52:56,627 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331501935] [2019-11-06 22:52:56,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:52:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:52:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:52:56,793 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331501935] [2019-11-06 22:52:56,793 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:52:56,793 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:52:56,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467338647] [2019-11-06 22:52:56,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:52:56,794 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:52:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:52:56,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:52:56,795 INFO L87 Difference]: Start difference. First operand 2615 states and 3768 transitions. Second operand 6 states. [2019-11-06 22:53:02,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:02,427 INFO L93 Difference]: Finished difference Result 6572 states and 9809 transitions. [2019-11-06 22:53:02,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:53:02,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2019-11-06 22:53:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:02,453 INFO L225 Difference]: With dead ends: 6572 [2019-11-06 22:53:02,453 INFO L226 Difference]: Without dead ends: 3963 [2019-11-06 22:53:02,463 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 22:53:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2019-11-06 22:53:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3910. [2019-11-06 22:53:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3910 states. [2019-11-06 22:53:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 5486 transitions. [2019-11-06 22:53:02,586 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 5486 transitions. Word has length 124 [2019-11-06 22:53:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:02,588 INFO L462 AbstractCegarLoop]: Abstraction has 3910 states and 5486 transitions. [2019-11-06 22:53:02,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:53:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 5486 transitions. [2019-11-06 22:53:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 22:53:02,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:02,591 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:02,591 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash 934964196, now seen corresponding path program 1 times [2019-11-06 22:53:02,592 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:02,592 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658171774] [2019-11-06 22:53:02,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:02,827 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658171774] [2019-11-06 22:53:02,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:53:02,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:53:02,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811925823] [2019-11-06 22:53:02,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:53:02,829 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:02,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:53:02,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:53:02,830 INFO L87 Difference]: Start difference. First operand 3910 states and 5486 transitions. Second operand 5 states. [2019-11-06 22:53:10,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:53:10,069 INFO L93 Difference]: Finished difference Result 10080 states and 14344 transitions. [2019-11-06 22:53:10,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:53:10,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2019-11-06 22:53:10,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:53:10,098 INFO L225 Difference]: With dead ends: 10080 [2019-11-06 22:53:10,098 INFO L226 Difference]: Without dead ends: 6176 [2019-11-06 22:53:10,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:53:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2019-11-06 22:53:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 6153. [2019-11-06 22:53:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6153 states. [2019-11-06 22:53:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8483 transitions. [2019-11-06 22:53:10,256 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8483 transitions. Word has length 134 [2019-11-06 22:53:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:53:10,256 INFO L462 AbstractCegarLoop]: Abstraction has 6153 states and 8483 transitions. [2019-11-06 22:53:10,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:53:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8483 transitions. [2019-11-06 22:53:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:53:10,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:53:10,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:10,260 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:53:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:53:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1847889797, now seen corresponding path program 1 times [2019-11-06 22:53:10,261 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:53:10,261 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139480507] [2019-11-06 22:53:10,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:53:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:10,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139480507] [2019-11-06 22:53:10,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386625763] [2019-11-06 22:53:10,527 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 22:53:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:53:10,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:53:10,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:53:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:10,766 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:53:10,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:53:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:53:11,149 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:53:11,150 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 11 [2019-11-06 22:53:11,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615859935] [2019-11-06 22:53:11,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:53:11,151 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:53:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:53:11,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:53:11,153 INFO L87 Difference]: Start difference. First operand 6153 states and 8483 transitions. Second operand 7 states.