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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:58,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:58,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:58,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:58,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:58,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:58,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:58,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:58,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:58,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:58,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:58,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:58,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:58,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:58,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:58,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:58,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:58,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:58,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:58,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:58,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:58,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:58,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:58,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:58,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:58,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:58,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:58,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:58,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:58,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:58,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:58,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:58,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:58,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:58,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:58,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:58,739 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 [2019-10-13 18:04:58,752 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:58,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:58,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:58,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:58,754 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:58,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:58,755 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:58,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:58,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:58,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:58,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:58,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:58,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:58,756 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:58,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:58,757 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:58,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:58,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:58,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:58,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:58,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:58,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:58,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:58,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:58,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:58,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:58,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:58,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:58,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:59,066 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:59,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:59,090 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:59,091 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:59,092 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:59,092 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-13 18:04:59,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2898c6d/e49a1a2b71024458b4f813d87d9d7df4/FLAG52c99f13d [2019-10-13 18:04:59,849 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:59,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-13 18:04:59,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2898c6d/e49a1a2b71024458b4f813d87d9d7df4/FLAG52c99f13d [2019-10-13 18:05:00,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa2898c6d/e49a1a2b71024458b4f813d87d9d7df4 [2019-10-13 18:05:00,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:00,085 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:00,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:00,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:00,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:00,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:00" (1/1) ... [2019-10-13 18:05:00,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3686b925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:00, skipping insertion in model container [2019-10-13 18:05:00,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:00" (1/1) ... [2019-10-13 18:05:00,106 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:00,187 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:00,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:00,979 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:01,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:01,373 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:01,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01 WrapperNode [2019-10-13 18:05:01,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:01,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:01,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:01,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:01,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (1/1) ... [2019-10-13 18:05:01,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (1/1) ... [2019-10-13 18:05:01,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (1/1) ... [2019-10-13 18:05:01,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (1/1) ... [2019-10-13 18:05:01,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (1/1) ... [2019-10-13 18:05:01,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (1/1) ... [2019-10-13 18:05:01,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (1/1) ... [2019-10-13 18:05:01,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:01,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:01,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:01,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:01,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (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 [2019-10-13 18:05:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:01,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:01,647 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:01,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:04,195 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:04,196 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:04,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:04 BoogieIcfgContainer [2019-10-13 18:05:04,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:04,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:04,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:04,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:04,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:00" (1/3) ... [2019-10-13 18:05:04,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60692b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:04, skipping insertion in model container [2019-10-13 18:05:04,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:01" (2/3) ... [2019-10-13 18:05:04,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60692b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:04, skipping insertion in model container [2019-10-13 18:05:04,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:04" (3/3) ... [2019-10-13 18:05:04,219 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2019-10-13 18:05:04,230 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:04,240 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:04,252 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:04,299 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:04,300 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:04,300 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:04,300 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:04,300 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:04,300 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:04,301 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:04,302 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 18:05:04,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:04,354 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] [2019-10-13 18:05:04,356 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:04,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1802126811, now seen corresponding path program 1 times [2019-10-13 18:05:04,371 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:04,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788219643] [2019-10-13 18:05:04,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:04,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:04,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:04,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788219643] [2019-10-13 18:05:04,762 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:04,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:04,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166999850] [2019-10-13 18:05:04,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:04,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:04,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:04,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:04,785 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:09,836 INFO L93 Difference]: Finished difference Result 1515 states and 2849 transitions. [2019-10-13 18:05:09,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:09,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2019-10-13 18:05:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:09,871 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:09,871 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:09,881 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 [2019-10-13 18:05:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1618 transitions. [2019-10-13 18:05:10,024 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1618 transitions. Word has length 64 [2019-10-13 18:05:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:10,025 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1618 transitions. [2019-10-13 18:05:10,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1618 transitions. [2019-10-13 18:05:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-13 18:05:10,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:10,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:10,043 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash 206002368, now seen corresponding path program 1 times [2019-10-13 18:05:10,044 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:10,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309513366] [2019-10-13 18:05:10,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:10,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:10,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:10,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309513366] [2019-10-13 18:05:10,541 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:10,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:10,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888375507] [2019-10-13 18:05:10,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:10,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:10,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:10,545 INFO L87 Difference]: Start difference. First operand 1031 states and 1618 transitions. Second operand 9 states. [2019-10-13 18:05:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:14,561 INFO L93 Difference]: Finished difference Result 3113 states and 4945 transitions. [2019-10-13 18:05:14,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:14,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 184 [2019-10-13 18:05:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:14,589 INFO L225 Difference]: With dead ends: 3113 [2019-10-13 18:05:14,589 INFO L226 Difference]: Without dead ends: 2088 [2019-10-13 18:05:14,595 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 [2019-10-13 18:05:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2019-10-13 18:05:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 2070. [2019-10-13 18:05:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-10-13 18:05:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2950 transitions. [2019-10-13 18:05:14,709 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2950 transitions. Word has length 184 [2019-10-13 18:05:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:14,712 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2950 transitions. [2019-10-13 18:05:14,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2950 transitions. [2019-10-13 18:05:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 18:05:14,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:14,724 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, 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] [2019-10-13 18:05:14,724 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:14,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2018610233, now seen corresponding path program 1 times [2019-10-13 18:05:14,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:14,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906871106] [2019-10-13 18:05:14,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:14,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:14,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:15,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906871106] [2019-10-13 18:05:15,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356957377] [2019-10-13 18:05:15,099 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 [2019-10-13 18:05:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:15,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:15,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:15,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:15,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:05:15,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707873570] [2019-10-13 18:05:15,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:15,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:15,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:15,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:15,381 INFO L87 Difference]: Start difference. First operand 2070 states and 2950 transitions. Second operand 11 states. [2019-10-13 18:05:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:19,568 INFO L93 Difference]: Finished difference Result 5239 states and 7431 transitions. [2019-10-13 18:05:19,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 18:05:19,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 234 [2019-10-13 18:05:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:19,587 INFO L225 Difference]: With dead ends: 5239 [2019-10-13 18:05:19,587 INFO L226 Difference]: Without dead ends: 3175 [2019-10-13 18:05:19,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:05:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2019-10-13 18:05:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 3121. [2019-10-13 18:05:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3121 states. [2019-10-13 18:05:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4041 transitions. [2019-10-13 18:05:19,701 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4041 transitions. Word has length 234 [2019-10-13 18:05:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:19,703 INFO L462 AbstractCegarLoop]: Abstraction has 3121 states and 4041 transitions. [2019-10-13 18:05:19,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:05:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4041 transitions. [2019-10-13 18:05:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-10-13 18:05:19,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:19,710 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:19,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:19,913 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:19,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1882479951, now seen corresponding path program 1 times [2019-10-13 18:05:19,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:19,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14437265] [2019-10-13 18:05:19,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:19,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:19,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-13 18:05:20,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14437265] [2019-10-13 18:05:20,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985328403] [2019-10-13 18:05:20,337 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 [2019-10-13 18:05:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:20,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:20,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:20,665 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-13 18:05:20,666 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:20,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 18:05:20,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598718388] [2019-10-13 18:05:20,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:05:20,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:20,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:05:20,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:05:20,670 INFO L87 Difference]: Start difference. First operand 3121 states and 4041 transitions. Second operand 3 states. [2019-10-13 18:05:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:22,117 INFO L93 Difference]: Finished difference Result 4136 states and 5213 transitions. [2019-10-13 18:05:22,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:05:22,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2019-10-13 18:05:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:22,142 INFO L225 Difference]: With dead ends: 4136 [2019-10-13 18:05:22,142 INFO L226 Difference]: Without dead ends: 4134 [2019-10-13 18:05:22,145 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:05:22,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2019-10-13 18:05:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3121. [2019-10-13 18:05:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3121 states. [2019-10-13 18:05:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 4040 transitions. [2019-10-13 18:05:22,225 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 4040 transitions. Word has length 326 [2019-10-13 18:05:22,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:22,226 INFO L462 AbstractCegarLoop]: Abstraction has 3121 states and 4040 transitions. [2019-10-13 18:05:22,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:05:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 4040 transitions. [2019-10-13 18:05:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2019-10-13 18:05:22,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:22,239 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:22,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:22,443 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:22,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1117184096, now seen corresponding path program 1 times [2019-10-13 18:05:22,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:22,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570120446] [2019-10-13 18:05:22,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:22,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:22,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 333 proven. 199 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-13 18:05:23,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570120446] [2019-10-13 18:05:23,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002459113] [2019-10-13 18:05:23,430 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 [2019-10-13 18:05:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:23,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:23,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 622 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-13 18:05:23,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:23,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:23,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779081777] [2019-10-13 18:05:23,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:23,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:23,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:23,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:23,777 INFO L87 Difference]: Start difference. First operand 3121 states and 4040 transitions. Second operand 12 states. [2019-10-13 18:05:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:35,211 INFO L93 Difference]: Finished difference Result 9775 states and 12850 transitions. [2019-10-13 18:05:35,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 18:05:35,211 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 511 [2019-10-13 18:05:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:35,244 INFO L225 Difference]: With dead ends: 9775 [2019-10-13 18:05:35,244 INFO L226 Difference]: Without dead ends: 6660 [2019-10-13 18:05:35,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 535 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-10-13 18:05:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6660 states. [2019-10-13 18:05:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6660 to 5928. [2019-10-13 18:05:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5928 states. [2019-10-13 18:05:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 7612 transitions. [2019-10-13 18:05:35,438 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 7612 transitions. Word has length 511 [2019-10-13 18:05:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:35,439 INFO L462 AbstractCegarLoop]: Abstraction has 5928 states and 7612 transitions. [2019-10-13 18:05:35,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:05:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 7612 transitions. [2019-10-13 18:05:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2019-10-13 18:05:35,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:35,466 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:35,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:35,671 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1905405812, now seen corresponding path program 1 times [2019-10-13 18:05:35,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:35,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779951919] [2019-10-13 18:05:35,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:35,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:35,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat