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/Problem18_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:09,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:09,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:09,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:10:09,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:09,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:09,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:09,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:09,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:09,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:09,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:09,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:09,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:09,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:09,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:09,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:09,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:09,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:09,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:09,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:09,535 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 [2019-10-15 00:10:09,556 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:09,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:09,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:09,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:09,559 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:09,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:09,559 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:09,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:09,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:09,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:09,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:09,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:09,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:09,561 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:09,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:09,562 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:09,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:09,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:09,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:09,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:09,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:09,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:09,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:09,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:09,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:09,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:09,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:09,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:09,565 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 [2019-10-15 00:10:09,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:09,867 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:09,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:09,872 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:09,872 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:09,873 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-10-15 00:10:09,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967e0cf56/0fb9c5e025f349aaa47413b170378a30/FLAG1089e8ca6 [2019-10-15 00:10:10,627 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:10,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-10-15 00:10:10,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967e0cf56/0fb9c5e025f349aaa47413b170378a30/FLAG1089e8ca6 [2019-10-15 00:10:10,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967e0cf56/0fb9c5e025f349aaa47413b170378a30 [2019-10-15 00:10:10,780 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:10,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:10,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:10,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:10,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:10,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:10" (1/1) ... [2019-10-15 00:10:10,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e611eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:10, skipping insertion in model container [2019-10-15 00:10:10,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:10" (1/1) ... [2019-10-15 00:10:10,803 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:10,933 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:12,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:12,144 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:12,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:12,605 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:12,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12 WrapperNode [2019-10-15 00:10:12,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:12,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:12,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:12,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:12,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (1/1) ... [2019-10-15 00:10:12,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:12,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:12,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:12,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:12,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (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 [2019-10-15 00:10:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:12,961 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:12,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:12,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:12,962 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:12,963 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:12,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:12,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:12,963 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:16,634 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:16,634 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:16,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:16 BoogieIcfgContainer [2019-10-15 00:10:16,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:16,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:16,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:16,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:16,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:10" (1/3) ... [2019-10-15 00:10:16,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdc9752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:16, skipping insertion in model container [2019-10-15 00:10:16,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:12" (2/3) ... [2019-10-15 00:10:16,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fdc9752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:16, skipping insertion in model container [2019-10-15 00:10:16,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:16" (3/3) ... [2019-10-15 00:10:16,653 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label27.c [2019-10-15 00:10:16,666 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:16,679 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:16,691 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:16,734 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:16,734 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:16,734 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:16,734 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:16,735 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:16,735 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:16,735 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:16,735 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 00:10:16,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:16,782 INFO L380 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] [2019-10-15 00:10:16,784 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:16,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash 602165681, now seen corresponding path program 1 times [2019-10-15 00:10:16,801 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:16,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488509188] [2019-10-15 00:10:16,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:16,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:16,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:17,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488509188] [2019-10-15 00:10:17,169 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:17,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:17,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643081662] [2019-10-15 00:10:17,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:17,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:17,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:17,193 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:21,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:21,599 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:21,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:21,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2019-10-15 00:10:21,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:21,635 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:21,635 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:21,646 INFO L600 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 [2019-10-15 00:10:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-10-15 00:10:21,798 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 36 [2019-10-15 00:10:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:21,800 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-10-15 00:10:21,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:21,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-10-15 00:10:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-15 00:10:21,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:21,809 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:21,809 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:21,811 INFO L82 PathProgramCache]: Analyzing trace with hash -820345212, now seen corresponding path program 1 times [2019-10-15 00:10:21,811 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:21,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341163001] [2019-10-15 00:10:21,812 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:21,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:21,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:22,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341163001] [2019-10-15 00:10:22,062 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:22,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:22,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124940291] [2019-10-15 00:10:22,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:22,064 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:22,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:22,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:22,065 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-10-15 00:10:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:27,270 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-10-15 00:10:27,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:27,270 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-10-15 00:10:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:27,293 INFO L225 Difference]: With dead ends: 4294 [2019-10-15 00:10:27,293 INFO L226 Difference]: Without dead ends: 2888 [2019-10-15 00:10:27,298 INFO L600 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 [2019-10-15 00:10:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-10-15 00:10:27,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-10-15 00:10:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-15 00:10:27,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-10-15 00:10:27,448 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 110 [2019-10-15 00:10:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:27,450 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-10-15 00:10:27,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-10-15 00:10:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-15 00:10:27,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:27,461 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:27,462 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash -784208084, now seen corresponding path program 1 times [2019-10-15 00:10:27,463 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:27,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783204157] [2019-10-15 00:10:27,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:27,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:27,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:27,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783204157] [2019-10-15 00:10:27,647 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:27,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:27,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946921024] [2019-10-15 00:10:27,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:27,651 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:27,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:27,655 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-10-15 00:10:32,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:32,228 INFO L93 Difference]: Finished difference Result 7205 states and 11771 transitions. [2019-10-15 00:10:32,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:32,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-15 00:10:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:32,252 INFO L225 Difference]: With dead ends: 7205 [2019-10-15 00:10:32,252 INFO L226 Difference]: Without dead ends: 4347 [2019-10-15 00:10:32,259 INFO L600 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 [2019-10-15 00:10:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-10-15 00:10:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-10-15 00:10:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-10-15 00:10:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-10-15 00:10:32,395 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 122 [2019-10-15 00:10:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:32,397 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-10-15 00:10:32,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-10-15 00:10:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 00:10:32,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:32,399 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:32,399 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1874435001, now seen corresponding path program 1 times [2019-10-15 00:10:32,400 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:32,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067726438] [2019-10-15 00:10:32,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:32,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:32,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:32,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067726438] [2019-10-15 00:10:32,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285028054] [2019-10-15 00:10:32,622 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 [2019-10-15 00:10:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:32,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:10:32,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:32,828 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:32,895 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:10:32,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 00:10:32,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689064616] [2019-10-15 00:10:32,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:10:32,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:32,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:10:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:32,897 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 4 states. [2019-10-15 00:10:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:38,434 INFO L93 Difference]: Finished difference Result 15792 states and 22607 transitions. [2019-10-15 00:10:38,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:10:38,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-10-15 00:10:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:38,484 INFO L225 Difference]: With dead ends: 15792 [2019-10-15 00:10:38,485 INFO L226 Difference]: Without dead ends: 11467 [2019-10-15 00:10:38,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2019-10-15 00:10:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10052. [2019-10-15 00:10:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10052 states. [2019-10-15 00:10:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10052 states to 10052 states and 13427 transitions. [2019-10-15 00:10:38,776 INFO L78 Accepts]: Start accepts. Automaton has 10052 states and 13427 transitions. Word has length 147 [2019-10-15 00:10:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:38,778 INFO L462 AbstractCegarLoop]: Abstraction has 10052 states and 13427 transitions. [2019-10-15 00:10:38,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:10:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 10052 states and 13427 transitions. [2019-10-15 00:10:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 00:10:38,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:38,782 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:38,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:38,990 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:38,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:38,991 INFO L82 PathProgramCache]: Analyzing trace with hash -980264100, now seen corresponding path program 1 times [2019-10-15 00:10:38,991 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:38,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235297873] [2019-10-15 00:10:38,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:38,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:38,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 58 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:39,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235297873] [2019-10-15 00:10:39,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248907481] [2019-10-15 00:10:39,145 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 [2019-10-15 00:10:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:39,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:39,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 00:10:39,330 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 58 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:39,450 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:39,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-15 00:10:39,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348135875] [2019-10-15 00:10:39,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:39,453 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:39,454 INFO L87 Difference]: Start difference. First operand 10052 states and 13427 transitions. Second operand 5 states. [2019-10-15 00:10:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:44,444 INFO L93 Difference]: Finished difference Result 20273 states and 27438 transitions. [2019-10-15 00:10:44,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:44,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2019-10-15 00:10:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:44,483 INFO L225 Difference]: With dead ends: 20273 [2019-10-15 00:10:44,483 INFO L226 Difference]: Without dead ends: 10227 [2019-10-15 00:10:44,510 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 357 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:10:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2019-10-15 00:10:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 9453. [2019-10-15 00:10:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9453 states. [2019-10-15 00:10:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9453 states to 9453 states and 11904 transitions. [2019-10-15 00:10:44,731 INFO L78 Accepts]: Start accepts. Automaton has 9453 states and 11904 transitions. Word has length 181 [2019-10-15 00:10:44,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:44,732 INFO L462 AbstractCegarLoop]: Abstraction has 9453 states and 11904 transitions. [2019-10-15 00:10:44,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 9453 states and 11904 transitions. [2019-10-15 00:10:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-15 00:10:44,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:44,737 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:44,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:44,942 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:44,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:44,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1382706633, now seen corresponding path program 1 times [2019-10-15 00:10:44,944 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:44,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879937443] [2019-10-15 00:10:44,944 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:44,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:44,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 130 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:45,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879937443] [2019-10-15 00:10:45,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711773440] [2019-10-15 00:10:45,156 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 [2019-10-15 00:10:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:45,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:10:45,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 130 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:45,325 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 130 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:45,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1811987220] [2019-10-15 00:10:45,434 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 233 [2019-10-15 00:10:45,492 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:10:45,493 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)