/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/Problem11_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:46:49,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:46:49,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:46:49,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:46:49,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:46:49,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:46:49,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:46:49,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:46:49,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:46:49,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:46:49,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:46:49,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:46:49,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:46:49,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:46:49,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:46:49,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:46:49,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:46:49,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:46:49,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:46:49,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:46:49,222 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 22:46:49,250 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:46:49,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:46:49,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:46:49,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:46:49,252 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:46:49,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:46:49,253 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:46:49,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:46:49,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:46:49,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:46:49,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:46:49,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:46:49,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:46:49,254 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:46:49,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:46:49,254 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:46:49,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:46:49,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:46:49,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:46:49,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:46:49,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:46:49,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:46:49,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:46:49,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:46:49,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:46:49,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:46:49,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:46:49,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:46:49,257 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 22:46:49,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:46:49,544 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:46:49,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:46:49,550 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:46:49,550 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:46:49,551 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-11-06 22:46:49,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d986c256/c6418a335d1f42f8b24eca15ba170a38/FLAG5b7ad23f3 [2019-11-06 22:46:50,206 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:46:50,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-11-06 22:46:50,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d986c256/c6418a335d1f42f8b24eca15ba170a38/FLAG5b7ad23f3 [2019-11-06 22:46:50,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d986c256/c6418a335d1f42f8b24eca15ba170a38 [2019-11-06 22:46:50,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:46:50,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:46:50,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:50,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:46:50,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:46:50,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:50" (1/1) ... [2019-11-06 22:46:50,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c825d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:50, skipping insertion in model container [2019-11-06 22:46:50,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:50" (1/1) ... [2019-11-06 22:46:50,499 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:46:50,555 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:46:51,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:51,287 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:46:51,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:46:51,605 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:46:51,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51 WrapperNode [2019-11-06 22:46:51,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:46:51,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:46:51,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:46:51,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:46:51,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (1/1) ... [2019-11-06 22:46:51,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (1/1) ... [2019-11-06 22:46:51,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (1/1) ... [2019-11-06 22:46:51,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (1/1) ... [2019-11-06 22:46:51,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (1/1) ... [2019-11-06 22:46:51,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (1/1) ... [2019-11-06 22:46:51,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (1/1) ... [2019-11-06 22:46:51,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:46:51,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:46:51,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:46:51,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:46:51,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (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 22:46:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:46:51,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:46:51,856 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:46:51,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:46:51,856 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:46:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:46:51,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:46:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:46:51,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:46:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:46:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:46:53,690 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:46:53,691 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:46:53,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:53 BoogieIcfgContainer [2019-11-06 22:46:53,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:46:53,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:46:53,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:46:53,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:46:53,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:50" (1/3) ... [2019-11-06 22:46:53,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbf674f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:53, skipping insertion in model container [2019-11-06 22:46:53,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:51" (2/3) ... [2019-11-06 22:46:53,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbf674f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:53, skipping insertion in model container [2019-11-06 22:46:53,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:53" (3/3) ... [2019-11-06 22:46:53,702 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label29.c [2019-11-06 22:46:53,712 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:46:53,720 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:46:53,732 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:46:53,760 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:46:53,761 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:46:53,761 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:46:53,761 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:46:53,761 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:46:53,761 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:46:53,761 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:46:53,761 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:46:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:46:53,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 22:46:53,819 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:53,820 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] [2019-11-06 22:46:53,822 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2007465363, now seen corresponding path program 1 times [2019-11-06 22:46:53,837 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:53,837 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666265632] [2019-11-06 22:46:53,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:54,184 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 22:46:54,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666265632] [2019-11-06 22:46:54,186 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:54,186 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:46:54,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43610781] [2019-11-06 22:46:54,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:46:54,195 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:46:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:46:54,213 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-11-06 22:46:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:55,679 INFO L93 Difference]: Finished difference Result 782 states and 1375 transitions. [2019-11-06 22:46:55,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:46:55,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2019-11-06 22:46:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:55,698 INFO L225 Difference]: With dead ends: 782 [2019-11-06 22:46:55,698 INFO L226 Difference]: Without dead ends: 428 [2019-11-06 22:46:55,706 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 22:46:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-11-06 22:46:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 420. [2019-11-06 22:46:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-11-06 22:46:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 671 transitions. [2019-11-06 22:46:55,798 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 671 transitions. Word has length 26 [2019-11-06 22:46:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:55,798 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 671 transitions. [2019-11-06 22:46:55,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:46:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 671 transitions. [2019-11-06 22:46:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 22:46:55,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:55,804 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:46:55,804 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:55,804 INFO L82 PathProgramCache]: Analyzing trace with hash -954827699, now seen corresponding path program 1 times [2019-11-06 22:46:55,805 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:55,805 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976416789] [2019-11-06 22:46:55,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:56,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976416789] [2019-11-06 22:46:56,050 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:56,050 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:46:56,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762351376] [2019-11-06 22:46:56,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:46:56,052 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:46:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:46:56,053 INFO L87 Difference]: Start difference. First operand 420 states and 671 transitions. Second operand 6 states. [2019-11-06 22:46:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:57,877 INFO L93 Difference]: Finished difference Result 1253 states and 2034 transitions. [2019-11-06 22:46:57,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:46:57,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2019-11-06 22:46:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:57,914 INFO L225 Difference]: With dead ends: 1253 [2019-11-06 22:46:57,915 INFO L226 Difference]: Without dead ends: 839 [2019-11-06 22:46:57,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:46:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2019-11-06 22:46:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 817. [2019-11-06 22:46:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2019-11-06 22:46:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1173 transitions. [2019-11-06 22:46:57,968 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1173 transitions. Word has length 95 [2019-11-06 22:46:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:57,969 INFO L462 AbstractCegarLoop]: Abstraction has 817 states and 1173 transitions. [2019-11-06 22:46:57,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:46:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1173 transitions. [2019-11-06 22:46:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:46:57,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:57,973 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:46:57,973 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1471750030, now seen corresponding path program 1 times [2019-11-06 22:46:57,974 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:57,974 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900358905] [2019-11-06 22:46:57,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:58,168 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900358905] [2019-11-06 22:46:58,168 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:46:58,168 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:46:58,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383445974] [2019-11-06 22:46:58,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:46:58,170 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:46:58,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:46:58,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:46:58,170 INFO L87 Difference]: Start difference. First operand 817 states and 1173 transitions. Second operand 6 states. [2019-11-06 22:46:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:46:59,672 INFO L93 Difference]: Finished difference Result 2046 states and 2971 transitions. [2019-11-06 22:46:59,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:46:59,673 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-11-06 22:46:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:46:59,685 INFO L225 Difference]: With dead ends: 2046 [2019-11-06 22:46:59,686 INFO L226 Difference]: Without dead ends: 1235 [2019-11-06 22:46:59,689 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 22:46:59,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2019-11-06 22:46:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1221. [2019-11-06 22:46:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2019-11-06 22:46:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1724 transitions. [2019-11-06 22:46:59,750 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1724 transitions. Word has length 98 [2019-11-06 22:46:59,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:46:59,750 INFO L462 AbstractCegarLoop]: Abstraction has 1221 states and 1724 transitions. [2019-11-06 22:46:59,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:46:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1724 transitions. [2019-11-06 22:46:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 22:46:59,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:46:59,753 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:46:59,753 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:46:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:46:59,754 INFO L82 PathProgramCache]: Analyzing trace with hash 698002821, now seen corresponding path program 1 times [2019-11-06 22:46:59,754 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:46:59,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898988118] [2019-11-06 22:46:59,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:46:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:46:59,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898988118] [2019-11-06 22:46:59,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558704182] [2019-11-06 22:46:59,883 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 22:46:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:46:59,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 22:46:59,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:00,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:00,148 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:00,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:00,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:00,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:00,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:00,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:00,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:00,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:00,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:47:00,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:00,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:00,536 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:47:00,537 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-11-06 22:47:00,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748069364] [2019-11-06 22:47:00,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:47:00,538 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:47:00,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:47:00,539 INFO L87 Difference]: Start difference. First operand 1221 states and 1724 transitions. Second operand 7 states. [2019-11-06 22:47:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:02,924 INFO L93 Difference]: Finished difference Result 4051 states and 6041 transitions. [2019-11-06 22:47:02,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:47:02,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2019-11-06 22:47:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:02,946 INFO L225 Difference]: With dead ends: 4051 [2019-11-06 22:47:02,947 INFO L226 Difference]: Without dead ends: 2836 [2019-11-06 22:47:02,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:47:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-11-06 22:47:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2789. [2019-11-06 22:47:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2789 states. [2019-11-06 22:47:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3708 transitions. [2019-11-06 22:47:03,066 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3708 transitions. Word has length 99 [2019-11-06 22:47:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:03,067 INFO L462 AbstractCegarLoop]: Abstraction has 2789 states and 3708 transitions. [2019-11-06 22:47:03,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:47:03,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3708 transitions. [2019-11-06 22:47:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:47:03,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:03,076 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-11-06 22:47:03,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:03,281 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1349266370, now seen corresponding path program 1 times [2019-11-06 22:47:03,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:03,282 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037928525] [2019-11-06 22:47:03,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:03,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037928525] [2019-11-06 22:47:03,397 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:47:03,397 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:47:03,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663108648] [2019-11-06 22:47:03,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:47:03,398 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:03,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:47:03,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:47:03,399 INFO L87 Difference]: Start difference. First operand 2789 states and 3708 transitions. Second operand 3 states. [2019-11-06 22:47:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:04,524 INFO L93 Difference]: Finished difference Result 7093 states and 9716 transitions. [2019-11-06 22:47:04,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:47:04,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2019-11-06 22:47:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:04,550 INFO L225 Difference]: With dead ends: 7093 [2019-11-06 22:47:04,551 INFO L226 Difference]: Without dead ends: 4310 [2019-11-06 22:47:04,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 22:47:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-11-06 22:47:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4118. [2019-11-06 22:47:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4118 states. [2019-11-06 22:47:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 5297 transitions. [2019-11-06 22:47:04,689 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 5297 transitions. Word has length 157 [2019-11-06 22:47:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:04,690 INFO L462 AbstractCegarLoop]: Abstraction has 4118 states and 5297 transitions. [2019-11-06 22:47:04,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:47:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 5297 transitions. [2019-11-06 22:47:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 22:47:04,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:04,694 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:47:04,694 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1834742215, now seen corresponding path program 1 times [2019-11-06 22:47:04,695 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:04,695 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735577259] [2019-11-06 22:47:04,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:47:04,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735577259] [2019-11-06 22:47:04,860 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810961887] [2019-11-06 22:47:04,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:05,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:47:05,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:47:05,104 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:47:05,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:47:05,201 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-11-06 22:47:05,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704923514] [2019-11-06 22:47:05,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:47:05,202 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:47:05,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:47:05,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:47:05,202 INFO L87 Difference]: Start difference. First operand 4118 states and 5297 transitions. Second operand 4 states. [2019-11-06 22:47:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:47:06,416 INFO L93 Difference]: Finished difference Result 5288 states and 6855 transitions. [2019-11-06 22:47:06,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:47:06,416 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2019-11-06 22:47:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:47:06,440 INFO L225 Difference]: With dead ends: 5288 [2019-11-06 22:47:06,441 INFO L226 Difference]: Without dead ends: 5286 [2019-11-06 22:47:06,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:47:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2019-11-06 22:47:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4710. [2019-11-06 22:47:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4710 states. [2019-11-06 22:47:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 6126 transitions. [2019-11-06 22:47:06,571 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 6126 transitions. Word has length 173 [2019-11-06 22:47:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:47:06,571 INFO L462 AbstractCegarLoop]: Abstraction has 4710 states and 6126 transitions. [2019-11-06 22:47:06,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:47:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 6126 transitions. [2019-11-06 22:47:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-06 22:47:06,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:47:06,577 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:47:06,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:06,789 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:47:06,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:47:06,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1048573628, now seen corresponding path program 1 times [2019-11-06 22:47:06,790 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:47:06,790 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355509966] [2019-11-06 22:47:06,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:47:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:47:07,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355509966] [2019-11-06 22:47:07,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663140946] [2019-11-06 22:47:07,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:47:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:47:07,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 22:47:07,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:47:07,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:07,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:11,042 WARN L191 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-11-06 22:47:15,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 22:47:15,745 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:47:15,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:15,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:15,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:15,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:47:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:47:15,901 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [923410616] [2019-11-06 22:47:15,906 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 227 [2019-11-06 22:47:15,950 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:47:15,950 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)