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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:57,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:57,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:57,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:57,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:57,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:57,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:57,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:57,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:57,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:57,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:57,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:57,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:57,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:57,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:57,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:57,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:57,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:57,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:57,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:57,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:57,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:57,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:57,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:57,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:57,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:57,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:57,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:57,768 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 22:04:57,799 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:57,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:57,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:57,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:57,801 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:57,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:57,802 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:57,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:57,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:57,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:57,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:57,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:57,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:57,804 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:57,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:57,805 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:57,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:57,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:57,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:57,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:57,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:57,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:57,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:57,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:57,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:57,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:57,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:57,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:57,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:58,086 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:58,098 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:58,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:58,103 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:58,104 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:58,104 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-10-14 22:04:58,162 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06a359f1/6d0172e7426e4ba1ac6a7555c91a837e/FLAGa809630a9 [2019-10-14 22:04:58,821 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:58,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-10-14 22:04:58,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06a359f1/6d0172e7426e4ba1ac6a7555c91a837e/FLAGa809630a9 [2019-10-14 22:04:58,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c06a359f1/6d0172e7426e4ba1ac6a7555c91a837e [2019-10-14 22:04:59,008 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:59,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:59,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:59,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:59,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:59,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:59" (1/1) ... [2019-10-14 22:04:59,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a425a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:59, skipping insertion in model container [2019-10-14 22:04:59,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:59" (1/1) ... [2019-10-14 22:04:59,029 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:59,107 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:05:00,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:00,080 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:05:00,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:00,278 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:05:00,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00 WrapperNode [2019-10-14 22:05:00,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:00,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:05:00,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:05:00,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:05:00,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (1/1) ... [2019-10-14 22:05:00,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (1/1) ... [2019-10-14 22:05:00,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (1/1) ... [2019-10-14 22:05:00,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (1/1) ... [2019-10-14 22:05:00,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (1/1) ... [2019-10-14 22:05:00,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (1/1) ... [2019-10-14 22:05:00,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (1/1) ... [2019-10-14 22:05:00,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:05:00,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:05:00,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:05:00,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:05:00,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (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 22:05:00,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:05:00,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:05:00,529 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:05:00,529 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:05:00,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:05:00,529 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:05:00,529 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:05:00,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:05:00,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:05:00,530 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:05:00,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:05:00,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:05:00,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:05:02,631 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:05:02,632 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:05:02,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:02 BoogieIcfgContainer [2019-10-14 22:05:02,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:05:02,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:05:02,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:05:02,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:05:02,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:59" (1/3) ... [2019-10-14 22:05:02,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425637d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:02, skipping insertion in model container [2019-10-14 22:05:02,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:00" (2/3) ... [2019-10-14 22:05:02,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425637d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:02, skipping insertion in model container [2019-10-14 22:05:02,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:02" (3/3) ... [2019-10-14 22:05:02,649 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label53.c [2019-10-14 22:05:02,658 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:05:02,667 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:05:02,678 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:05:02,708 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:05:02,709 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:05:02,709 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:05:02,709 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:05:02,709 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:05:02,709 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:05:02,709 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:05:02,710 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:05:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:05:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 22:05:02,745 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:02,746 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] [2019-10-14 22:05:02,747 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash -302324190, now seen corresponding path program 1 times [2019-10-14 22:05:02,762 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:02,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003391209] [2019-10-14 22:05:02,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,763 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:03,065 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 22:05:03,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003391209] [2019-10-14 22:05:03,067 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:03,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:05:03,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212898561] [2019-10-14 22:05:03,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:03,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:03,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:05:03,090 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:05:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:07,835 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-14 22:05:07,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:05:07,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2019-10-14 22:05:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:07,864 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:05:07,865 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:05:07,874 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 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 22:05:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:05:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:05:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:05:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-14 22:05:07,987 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 43 [2019-10-14 22:05:07,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:07,988 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-14 22:05:07,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-14 22:05:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-14 22:05:07,998 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:07,998 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:07,999 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:07,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:07,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1581366797, now seen corresponding path program 1 times [2019-10-14 22:05:07,999 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:08,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458598908] [2019-10-14 22:05:08,000 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:08,000 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:08,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:08,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458598908] [2019-10-14 22:05:08,546 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:08,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:05:08,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117883632] [2019-10-14 22:05:08,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:05:08,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:08,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:05:08,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:05:08,550 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-14 22:05:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:12,486 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-10-14 22:05:12,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:05:12,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 178 [2019-10-14 22:05:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:12,501 INFO L225 Difference]: With dead ends: 3125 [2019-10-14 22:05:12,502 INFO L226 Difference]: Without dead ends: 2100 [2019-10-14 22:05:12,505 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 22:05:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-14 22:05:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-10-14 22:05:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-10-14 22:05:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-10-14 22:05:12,588 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 178 [2019-10-14 22:05:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:12,589 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-10-14 22:05:12,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:05:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-10-14 22:05:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-14 22:05:12,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:12,595 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:05:12,595 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1384968958, now seen corresponding path program 1 times [2019-10-14 22:05:12,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:12,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886161521] [2019-10-14 22:05:12,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:12,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:12,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:05:12,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886161521] [2019-10-14 22:05:12,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728701034] [2019-10-14 22:05:12,952 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 22:05:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:13,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:05:13,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 22:05:13,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:13,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:05:13,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264127884] [2019-10-14 22:05:13,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:13,254 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:13,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:13,255 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-10-14 22:05:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:16,961 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-10-14 22:05:16,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:05:16,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2019-10-14 22:05:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:16,984 INFO L225 Difference]: With dead ends: 5192 [2019-10-14 22:05:16,984 INFO L226 Difference]: Without dead ends: 3129 [2019-10-14 22:05:16,990 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-10-14 22:05:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-10-14 22:05:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-10-14 22:05:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-10-14 22:05:17,092 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 213 [2019-10-14 22:05:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:17,094 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-10-14 22:05:17,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-10-14 22:05:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2019-10-14 22:05:17,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:17,105 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:17,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:17,310 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1371980027, now seen corresponding path program 1 times [2019-10-14 22:05:17,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:17,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821808627] [2019-10-14 22:05:17,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:17,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:17,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 181 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 22:05:17,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821808627] [2019-10-14 22:05:17,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284841872] [2019-10-14 22:05:17,758 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 22:05:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:17,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:17,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 22:05:18,116 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:18,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:05:18,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711920733] [2019-10-14 22:05:18,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:18,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:18,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:18,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:18,119 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-10-14 22:05:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:25,640 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-10-14 22:05:25,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 22:05:25,641 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 322 [2019-10-14 22:05:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:25,678 INFO L225 Difference]: With dead ends: 10419 [2019-10-14 22:05:25,678 INFO L226 Difference]: Without dead ends: 6317 [2019-10-14 22:05:25,689 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:05:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-10-14 22:05:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6275. [2019-10-14 22:05:25,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6275 states. [2019-10-14 22:05:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 7952 transitions. [2019-10-14 22:05:25,900 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 7952 transitions. Word has length 322 [2019-10-14 22:05:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:25,902 INFO L462 AbstractCegarLoop]: Abstraction has 6275 states and 7952 transitions. [2019-10-14 22:05:25,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 7952 transitions. [2019-10-14 22:05:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2019-10-14 22:05:25,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:25,922 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:26,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:26,131 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash 102017770, now seen corresponding path program 1 times [2019-10-14 22:05:26,131 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:26,132 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664403965] [2019-10-14 22:05:26,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:26,132 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:26,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 200 proven. 115 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 22:05:27,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664403965] [2019-10-14 22:05:27,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639492601] [2019-10-14 22:05:27,202 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 22:05:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:27,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:27,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 22:05:27,560 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:27,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:05:27,561 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294066280] [2019-10-14 22:05:27,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:27,564 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:27,566 INFO L87 Difference]: Start difference. First operand 6275 states and 7952 transitions. Second operand 11 states. [2019-10-14 22:05:33,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:33,102 INFO L93 Difference]: Finished difference Result 14003 states and 18478 transitions. [2019-10-14 22:05:33,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:05:33,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 523 [2019-10-14 22:05:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:33,140 INFO L225 Difference]: With dead ends: 14003 [2019-10-14 22:05:33,140 INFO L226 Difference]: Without dead ends: 7351 [2019-10-14 22:05:33,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-14 22:05:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2019-10-14 22:05:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 7313. [2019-10-14 22:05:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7313 states. [2019-10-14 22:05:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7313 states to 7313 states and 8292 transitions. [2019-10-14 22:05:33,423 INFO L78 Accepts]: Start accepts. Automaton has 7313 states and 8292 transitions. Word has length 523 [2019-10-14 22:05:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:33,423 INFO L462 AbstractCegarLoop]: Abstraction has 7313 states and 8292 transitions. [2019-10-14 22:05:33,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7313 states and 8292 transitions. [2019-10-14 22:05:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2019-10-14 22:05:33,453 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:33,454 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2019-10-14 22:05:33,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:33,657 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1181249610, now seen corresponding path program 1 times [2019-10-14 22:05:33,659 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:33,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357815646] [2019-10-14 22:05:33,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:33,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:33,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 329 proven. 460 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2019-10-14 22:05:34,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357815646] [2019-10-14 22:05:34,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103429852] [2019-10-14 22:05:34,761 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 22:05:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:34,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:34,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1862 backedges. 1316 proven. 2 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-14 22:05:35,348 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:35,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:05:35,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303046079] [2019-10-14 22:05:35,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:05:35,350 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:35,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:05:35,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:35,350 INFO L87 Difference]: Start difference. First operand 7313 states and 8292 transitions. Second operand 12 states.