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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:50,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:50,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:50,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:50,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:50,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:50,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:50,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:50,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:50,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:50,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:50,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:50,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:50,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:50,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:50,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:50,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:50,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:50,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:50,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:50,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:50,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:50,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:50,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:50,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:50,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:50,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:50,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:50,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:50,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:50,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:50,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:50,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:50,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:50,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:50,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:50,742 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 [2019-10-14 22:04:50,755 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:50,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:50,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:50,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:50,758 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:50,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:50,758 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:50,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:50,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:50,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:50,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:50,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:50,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:50,759 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:50,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:50,760 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:50,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:50,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:50,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:50,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:50,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:50,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:50,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:50,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:50,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:50,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:50,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:50,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:50,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:51,041 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:51,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:51,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:51,058 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:51,059 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:51,059 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-10-14 22:04:51,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd155d6a1/c6bea8aa150849bdb929ffbd6e32c332/FLAGa6a401387 [2019-10-14 22:04:51,798 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:51,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-10-14 22:04:51,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd155d6a1/c6bea8aa150849bdb929ffbd6e32c332/FLAGa6a401387 [2019-10-14 22:04:51,947 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd155d6a1/c6bea8aa150849bdb929ffbd6e32c332 [2019-10-14 22:04:51,957 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:51,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:51,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:51,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:51,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:51,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:51" (1/1) ... [2019-10-14 22:04:51,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fb768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:51, skipping insertion in model container [2019-10-14 22:04:51,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:51" (1/1) ... [2019-10-14 22:04:51,976 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:52,062 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:52,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:52,987 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:53,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:53,684 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:53,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53 WrapperNode [2019-10-14 22:04:53,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:53,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:53,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:53,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:53,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (1/1) ... [2019-10-14 22:04:53,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (1/1) ... [2019-10-14 22:04:53,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (1/1) ... [2019-10-14 22:04:53,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (1/1) ... [2019-10-14 22:04:53,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (1/1) ... [2019-10-14 22:04:53,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (1/1) ... [2019-10-14 22:04:53,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (1/1) ... [2019-10-14 22:04:53,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:53,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:53,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:53,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:53,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (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 [2019-10-14 22:04:53,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:53,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:53,936 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:53,936 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:53,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:53,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:56,268 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:56,269 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:56,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:56 BoogieIcfgContainer [2019-10-14 22:04:56,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:56,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:56,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:56,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:56,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:51" (1/3) ... [2019-10-14 22:04:56,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77ba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:56, skipping insertion in model container [2019-10-14 22:04:56,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:53" (2/3) ... [2019-10-14 22:04:56,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77ba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:56, skipping insertion in model container [2019-10-14 22:04:56,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:56" (3/3) ... [2019-10-14 22:04:56,288 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label48.c [2019-10-14 22:04:56,298 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:56,307 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:56,318 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:56,354 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:56,355 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:56,355 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:56,355 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:56,355 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:56,356 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:56,356 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:56,356 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 22:04:56,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:56,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:56,401 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash -241070563, now seen corresponding path program 1 times [2019-10-14 22:04:56,415 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:56,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487876819] [2019-10-14 22:04:56,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:56,416 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:56,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:56,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487876819] [2019-10-14 22:04:56,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:56,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:56,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865099848] [2019-10-14 22:04:56,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:56,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:56,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:56,914 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:05:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:01,864 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-14 22:05:01,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:05:01,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2019-10-14 22:05:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:01,892 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:05:01,892 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:05:01,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:05:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:05:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:05:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:05:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-14 22:05:02,030 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 70 [2019-10-14 22:05:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:02,033 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-14 22:05:02,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-14 22:05:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 22:05:02,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:02,051 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, 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] [2019-10-14 22:05:02,051 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:02,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1544489621, now seen corresponding path program 1 times [2019-10-14 22:05:02,053 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:02,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589084756] [2019-10-14 22:05:02,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,054 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:02,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589084756] [2019-10-14 22:05:02,450 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:02,450 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:05:02,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427394697] [2019-10-14 22:05:02,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:05:02,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:05:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:05:02,454 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-14 22:05:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:06,436 INFO L93 Difference]: Finished difference Result 3118 states and 4964 transitions. [2019-10-14 22:05:06,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:05:06,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 153 [2019-10-14 22:05:06,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:06,451 INFO L225 Difference]: With dead ends: 3118 [2019-10-14 22:05:06,451 INFO L226 Difference]: Without dead ends: 2093 [2019-10-14 22:05:06,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:05:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2019-10-14 22:05:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2075. [2019-10-14 22:05:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2019-10-14 22:05:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2956 transitions. [2019-10-14 22:05:06,535 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2956 transitions. Word has length 153 [2019-10-14 22:05:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:06,536 INFO L462 AbstractCegarLoop]: Abstraction has 2075 states and 2956 transitions. [2019-10-14 22:05:06,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:05:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2956 transitions. [2019-10-14 22:05:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-14 22:05:06,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:06,539 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, 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] [2019-10-14 22:05:06,539 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash -258818048, now seen corresponding path program 1 times [2019-10-14 22:05:06,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:06,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251504802] [2019-10-14 22:05:06,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:06,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:06,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:05:06,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251504802] [2019-10-14 22:05:06,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836743427] [2019-10-14 22:05:06,847 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 [2019-10-14 22:05:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:06,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:07,040 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:07,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-14 22:05:07,040 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405206259] [2019-10-14 22:05:07,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:05:07,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:05:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:05:07,042 INFO L87 Difference]: Start difference. First operand 2075 states and 2956 transitions. Second operand 3 states. [2019-10-14 22:05:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:08,575 INFO L93 Difference]: Finished difference Result 3102 states and 4277 transitions. [2019-10-14 22:05:08,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:05:08,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2019-10-14 22:05:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:08,592 INFO L225 Difference]: With dead ends: 3102 [2019-10-14 22:05:08,593 INFO L226 Difference]: Without dead ends: 3100 [2019-10-14 22:05:08,595 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:05:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2019-10-14 22:05:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2755. [2019-10-14 22:05:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2755 states. [2019-10-14 22:05:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 3884 transitions. [2019-10-14 22:05:08,687 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 3884 transitions. Word has length 170 [2019-10-14 22:05:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:08,689 INFO L462 AbstractCegarLoop]: Abstraction has 2755 states and 3884 transitions. [2019-10-14 22:05:08,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:05:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 3884 transitions. [2019-10-14 22:05:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-14 22:05:08,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:08,694 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, 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, 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] [2019-10-14 22:05:08,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:08,908 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash -61464174, now seen corresponding path program 1 times [2019-10-14 22:05:08,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:08,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542337836] [2019-10-14 22:05:08,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:08,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:08,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:05:09,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542337836] [2019-10-14 22:05:09,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640181800] [2019-10-14 22:05:09,381 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 [2019-10-14 22:05:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:09,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:09,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:09,734 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:09,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:05:09,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313612436] [2019-10-14 22:05:09,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:05:09,737 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:05:09,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:09,738 INFO L87 Difference]: Start difference. First operand 2755 states and 3884 transitions. Second operand 12 states. [2019-10-14 22:05:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:16,063 INFO L93 Difference]: Finished difference Result 7991 states and 11355 transitions. [2019-10-14 22:05:16,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 22:05:16,065 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 285 [2019-10-14 22:05:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:16,090 INFO L225 Difference]: With dead ends: 7991 [2019-10-14 22:05:16,090 INFO L226 Difference]: Without dead ends: 5242 [2019-10-14 22:05:16,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:05:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2019-10-14 22:05:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4510. [2019-10-14 22:05:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4510 states. [2019-10-14 22:05:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 5583 transitions. [2019-10-14 22:05:16,234 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 5583 transitions. Word has length 285 [2019-10-14 22:05:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:16,235 INFO L462 AbstractCegarLoop]: Abstraction has 4510 states and 5583 transitions. [2019-10-14 22:05:16,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:05:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 5583 transitions. [2019-10-14 22:05:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2019-10-14 22:05:16,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:16,257 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:16,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:16,469 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash 566728298, now seen corresponding path program 1 times [2019-10-14 22:05:16,469 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:16,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954893796] [2019-10-14 22:05:16,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:16,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:16,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 583 proven. 2 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2019-10-14 22:05:17,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954893796] [2019-10-14 22:05:17,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572068643] [2019-10-14 22:05:17,460 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 [2019-10-14 22:05:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:17,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 586 proven. 2 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2019-10-14 22:05:17,937 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:17,938 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:05:17,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049325246] [2019-10-14 22:05:17,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:17,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:17,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:17,940 INFO L87 Difference]: Start difference. First operand 4510 states and 5583 transitions. Second operand 11 states. [2019-10-14 22:05:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:23,942 INFO L93 Difference]: Finished difference Result 10080 states and 12704 transitions. [2019-10-14 22:05:23,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 22:05:23,943 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 639 [2019-10-14 22:05:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:23,967 INFO L225 Difference]: With dead ends: 10080 [2019-10-14 22:05:23,968 INFO L226 Difference]: Without dead ends: 5576 [2019-10-14 22:05:23,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:05:23,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2019-10-14 22:05:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 5560. [2019-10-14 22:05:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5560 states. [2019-10-14 22:05:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6810 transitions. [2019-10-14 22:05:24,105 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6810 transitions. Word has length 639 [2019-10-14 22:05:24,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:24,107 INFO L462 AbstractCegarLoop]: Abstraction has 5560 states and 6810 transitions. [2019-10-14 22:05:24,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:24,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6810 transitions. [2019-10-14 22:05:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2019-10-14 22:05:24,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:24,133 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-10-14 22:05:24,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:24,339 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash -64568860, now seen corresponding path program 1 times [2019-10-14 22:05:24,340 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:24,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413673043] [2019-10-14 22:05:24,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:24,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:24,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 319 proven. 20 refuted. 0 times theorem prover too weak. 915 trivial. 0 not checked. [2019-10-14 22:05:25,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413673043] [2019-10-14 22:05:25,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271754208] [2019-10-14 22:05:25,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:25,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:25,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 927 trivial. 0 not checked. [2019-10-14 22:05:25,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:25,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 22:05:25,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831706721] [2019-10-14 22:05:25,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:05:25,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:05:25,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:05:25,793 INFO L87 Difference]: Start difference. First operand 5560 states and 6810 transitions. Second operand 3 states. [2019-10-14 22:05:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:27,578 INFO L93 Difference]: Finished difference Result 14525 states and 17996 transitions. [2019-10-14 22:05:27,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:05:27,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 646 [2019-10-14 22:05:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:27,605 INFO L225 Difference]: With dead ends: 14525 [2019-10-14 22:05:27,606 INFO L226 Difference]: Without dead ends: 7227 [2019-10-14 22:05:27,620 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 656 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:05:27,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2019-10-14 22:05:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 7223. [2019-10-14 22:05:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7223 states. [2019-10-14 22:05:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7223 states to 7223 states and 7868 transitions. [2019-10-14 22:05:27,753 INFO L78 Accepts]: Start accepts. Automaton has 7223 states and 7868 transitions. Word has length 646 [2019-10-14 22:05:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:27,754 INFO L462 AbstractCegarLoop]: Abstraction has 7223 states and 7868 transitions. [2019-10-14 22:05:27,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:05:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 7223 states and 7868 transitions. [2019-10-14 22:05:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2019-10-14 22:05:27,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:27,777 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:27,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:27,985 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:27,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2091224216, now seen corresponding path program 1 times [2019-10-14 22:05:27,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:27,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632400007] [2019-10-14 22:05:27,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:27,987 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:27,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat