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/Problem14_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:21,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:21,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:21,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:06:21,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:06:21,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:06:21,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:06:21,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:06:21,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:06:21,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:06:21,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:06:21,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:06:21,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:06:21,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:06:21,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:06:21,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:06:21,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:06:21,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:06:21,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:06:21,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:06:21,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:06:21,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:06:21,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:06:21,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:06:21,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:06:21,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:21,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:21,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:21,414 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 00:06:21,428 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:21,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:21,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:21,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:21,430 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:21,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:21,430 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:21,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:21,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:21,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:21,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:21,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:21,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:21,431 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:21,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:21,432 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:21,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:21,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:21,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:21,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:21,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:21,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:21,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:21,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:21,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:21,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:21,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:21,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:21,435 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 00:06:21,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:21,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:21,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:21,816 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:21,816 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:21,817 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-10-15 00:06:21,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bb873a04/f399f7ee2e9444beba43c49d5bb7b7e6/FLAG663aec2fb [2019-10-15 00:06:22,419 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:22,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-10-15 00:06:22,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bb873a04/f399f7ee2e9444beba43c49d5bb7b7e6/FLAG663aec2fb [2019-10-15 00:06:22,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bb873a04/f399f7ee2e9444beba43c49d5bb7b7e6 [2019-10-15 00:06:22,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:22,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:22,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:22,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:22,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:22,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:22" (1/1) ... [2019-10-15 00:06:22,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5611840f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:22, skipping insertion in model container [2019-10-15 00:06:22,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:22" (1/1) ... [2019-10-15 00:06:22,749 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:22,806 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:23,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:23,433 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:23,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:23,553 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:23,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23 WrapperNode [2019-10-15 00:06:23,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:23,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:23,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:23,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:23,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (1/1) ... [2019-10-15 00:06:23,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (1/1) ... [2019-10-15 00:06:23,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (1/1) ... [2019-10-15 00:06:23,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (1/1) ... [2019-10-15 00:06:23,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (1/1) ... [2019-10-15 00:06:23,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (1/1) ... [2019-10-15 00:06:23,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (1/1) ... [2019-10-15 00:06:23,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:23,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:23,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:23,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:23,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (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 00:06:23,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:23,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:23,784 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:23,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:23,784 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:23,785 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:23,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:25,303 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:25,303 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:25,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:25 BoogieIcfgContainer [2019-10-15 00:06:25,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:25,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:25,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:25,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:25,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:22" (1/3) ... [2019-10-15 00:06:25,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5787fe49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:25, skipping insertion in model container [2019-10-15 00:06:25,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:23" (2/3) ... [2019-10-15 00:06:25,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5787fe49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:25, skipping insertion in model container [2019-10-15 00:06:25,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:25" (3/3) ... [2019-10-15 00:06:25,314 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label37.c [2019-10-15 00:06:25,325 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:25,334 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:25,345 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:25,373 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:25,373 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:25,373 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:25,373 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:25,374 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:25,374 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:25,374 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:25,374 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 00:06:25,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:25,416 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] [2019-10-15 00:06:25,418 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash -803708109, now seen corresponding path program 1 times [2019-10-15 00:06:25,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:25,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705481313] [2019-10-15 00:06:25,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:25,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:25,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:25,705 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 00:06:25,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705481313] [2019-10-15 00:06:25,706 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:25,706 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:06:25,707 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457015420] [2019-10-15 00:06:25,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:06:25,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:06:25,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:06:25,737 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:06:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:26,931 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:06:26,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:06:26,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 00:06:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:26,950 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:06:26,950 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:06:26,960 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 00:06:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:06:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:06:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:06:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-15 00:06:27,045 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 24 [2019-10-15 00:06:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:27,046 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-15 00:06:27,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:06:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-15 00:06:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 00:06:27,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:27,051 INFO L380 BasicCegarLoop]: trace histogram [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 00:06:27,051 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:27,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:27,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1307539406, now seen corresponding path program 1 times [2019-10-15 00:06:27,052 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:27,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494553596] [2019-10-15 00:06:27,052 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:27,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:27,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:27,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494553596] [2019-10-15 00:06:27,330 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:27,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:06:27,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132893571] [2019-10-15 00:06:27,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:06:27,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:06:27,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:06:27,333 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-15 00:06:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:28,533 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-15 00:06:28,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:06:28,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2019-10-15 00:06:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:28,544 INFO L225 Difference]: With dead ends: 936 [2019-10-15 00:06:28,544 INFO L226 Difference]: Without dead ends: 570 [2019-10-15 00:06:28,546 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 00:06:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-15 00:06:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-15 00:06:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-15 00:06:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-15 00:06:28,582 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 98 [2019-10-15 00:06:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:28,583 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-15 00:06:28,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:06:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-15 00:06:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-15 00:06:28,586 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:28,587 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:06:28,587 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1750148479, now seen corresponding path program 1 times [2019-10-15 00:06:28,588 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:28,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176632795] [2019-10-15 00:06:28,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:28,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:28,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:28,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176632795] [2019-10-15 00:06:28,712 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:28,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:28,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658713142] [2019-10-15 00:06:28,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:28,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:28,715 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-15 00:06:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:30,403 INFO L93 Difference]: Finished difference Result 2218 states and 3287 transitions. [2019-10-15 00:06:30,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:30,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2019-10-15 00:06:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:30,415 INFO L225 Difference]: With dead ends: 2218 [2019-10-15 00:06:30,416 INFO L226 Difference]: Without dead ends: 1662 [2019-10-15 00:06:30,418 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-10-15 00:06:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1662. [2019-10-15 00:06:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1662 states. [2019-10-15 00:06:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2283 transitions. [2019-10-15 00:06:30,491 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2283 transitions. Word has length 107 [2019-10-15 00:06:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:30,492 INFO L462 AbstractCegarLoop]: Abstraction has 1662 states and 2283 transitions. [2019-10-15 00:06:30,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2283 transitions. [2019-10-15 00:06:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-15 00:06:30,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:30,501 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 00:06:30,501 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1682277713, now seen corresponding path program 1 times [2019-10-15 00:06:30,502 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:30,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816346180] [2019-10-15 00:06:30,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:30,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:30,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:06:30,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816346180] [2019-10-15 00:06:30,841 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:30,841 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:30,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647300016] [2019-10-15 00:06:30,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:30,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:30,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:30,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:30,845 INFO L87 Difference]: Start difference. First operand 1662 states and 2283 transitions. Second operand 4 states. [2019-10-15 00:06:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:32,301 INFO L93 Difference]: Finished difference Result 5334 states and 7445 transitions. [2019-10-15 00:06:32,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:32,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2019-10-15 00:06:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:32,322 INFO L225 Difference]: With dead ends: 5334 [2019-10-15 00:06:32,322 INFO L226 Difference]: Without dead ends: 3678 [2019-10-15 00:06:32,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2019-10-15 00:06:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 3678. [2019-10-15 00:06:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3678 states. [2019-10-15 00:06:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 4968 transitions. [2019-10-15 00:06:32,430 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 4968 transitions. Word has length 216 [2019-10-15 00:06:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:32,431 INFO L462 AbstractCegarLoop]: Abstraction has 3678 states and 4968 transitions. [2019-10-15 00:06:32,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 4968 transitions. [2019-10-15 00:06:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-15 00:06:32,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:32,438 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 00:06:32,438 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:32,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash 710456757, now seen corresponding path program 1 times [2019-10-15 00:06:32,439 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:32,439 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243783689] [2019-10-15 00:06:32,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:32,440 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:32,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:33,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243783689] [2019-10-15 00:06:33,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867147306] [2019-10-15 00:06:33,217 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 00:06:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:33,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:06:33,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:33,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 00:06:33,578 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:33,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:33,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:33,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:33,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:33,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:33,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:34,272 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:06:34,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2019-10-15 00:06:34,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262729363] [2019-10-15 00:06:34,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:06:34,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:34,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:06:34,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:06:34,274 INFO L87 Difference]: Start difference. First operand 3678 states and 4968 transitions. Second operand 5 states. [2019-10-15 00:06:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:35,583 INFO L93 Difference]: Finished difference Result 7942 states and 10714 transitions. [2019-10-15 00:06:35,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:06:35,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-10-15 00:06:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:35,606 INFO L225 Difference]: With dead ends: 7942 [2019-10-15 00:06:35,607 INFO L226 Difference]: Without dead ends: 4270 [2019-10-15 00:06:35,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 551 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-15 00:06:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2019-10-15 00:06:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3716. [2019-10-15 00:06:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3716 states. [2019-10-15 00:06:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4946 transitions. [2019-10-15 00:06:35,783 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4946 transitions. Word has length 278 [2019-10-15 00:06:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:35,784 INFO L462 AbstractCegarLoop]: Abstraction has 3716 states and 4946 transitions. [2019-10-15 00:06:35,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:06:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4946 transitions. [2019-10-15 00:06:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2019-10-15 00:06:35,800 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:35,802 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:36,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:06:36,017 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash -987748772, now seen corresponding path program 1 times [2019-10-15 00:06:36,018 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:36,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997182235] [2019-10-15 00:06:36,019 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:36,019 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:36,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 137 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:36,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997182235] [2019-10-15 00:06:36,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712373323] [2019-10-15 00:06:36,842 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 00:06:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:36,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:06:36,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:37,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:06:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 260 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 00:06:37,242 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:37,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:06:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 59 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:37,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [148964445] [2019-10-15 00:06:37,813 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 363 [2019-10-15 00:06:37,864 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:37,864 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:07:01,923 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:07:01,926 INFO L272 AbstractInterpreter]: Visited 151 different actions 297 times. Merged at 4 different actions 5 times. Never widened. Performed 575 root evaluator evaluations with a maximum evaluation depth of 14. Performed 575 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:07:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:01,930 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates