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/Problem14_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:11,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:11,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:11,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:11,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:11,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:11,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:11,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:11,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:11,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:11,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:11,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:11,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:11,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:11,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:11,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:11,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:11,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:11,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:11,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:11,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:11,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:11,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:11,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:11,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:11,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:11,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:11,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:11,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:11,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:11,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:11,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:11,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:11,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:11,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:11,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:11,764 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 18:02:11,784 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:11,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:11,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:11,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:11,787 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:11,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:11,788 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:11,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:11,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:11,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:11,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:11,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:11,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:11,790 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:11,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:11,790 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:11,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:11,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:11,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:11,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:11,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:11,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:11,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:11,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:11,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:11,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:11,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:11,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:11,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:12,104 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:12,119 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:12,123 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:12,124 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:12,125 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:12,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label09.c [2019-10-13 18:02:12,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f121dcf/d76ca0da56064d849b82c43637975b12/FLAGc5faf1b7b [2019-10-13 18:02:12,825 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:12,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label09.c [2019-10-13 18:02:12,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f121dcf/d76ca0da56064d849b82c43637975b12/FLAGc5faf1b7b [2019-10-13 18:02:13,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f121dcf/d76ca0da56064d849b82c43637975b12 [2019-10-13 18:02:13,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:13,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:13,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:13,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:13,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:13,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:13" (1/1) ... [2019-10-13 18:02:13,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e35f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:13, skipping insertion in model container [2019-10-13 18:02:13,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:13" (1/1) ... [2019-10-13 18:02:13,080 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:13,146 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:13,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:13,751 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:13,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:14,017 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:14,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14 WrapperNode [2019-10-13 18:02:14,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:14,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:14,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:14,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:14,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (1/1) ... [2019-10-13 18:02:14,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:14,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:14,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:14,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:14,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (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 18:02:14,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:14,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:14,295 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:14,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:14,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:14,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:15,809 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:15,809 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:15,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:15 BoogieIcfgContainer [2019-10-13 18:02:15,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:15,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:15,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:15,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:15,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:13" (1/3) ... [2019-10-13 18:02:15,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273e8782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:15, skipping insertion in model container [2019-10-13 18:02:15,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:14" (2/3) ... [2019-10-13 18:02:15,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273e8782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:15, skipping insertion in model container [2019-10-13 18:02:15,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:15" (3/3) ... [2019-10-13 18:02:15,822 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label09.c [2019-10-13 18:02:15,833 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:15,845 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:15,859 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:15,914 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:15,914 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:15,918 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:15,918 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:15,918 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:15,918 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:15,918 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:15,919 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-13 18:02:15,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:15,982 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] [2019-10-13 18:02:15,984 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:15,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1524899170, now seen corresponding path program 1 times [2019-10-13 18:02:16,004 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:16,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997614155] [2019-10-13 18:02:16,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:16,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:16,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,429 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 18:02:16,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997614155] [2019-10-13 18:02:16,430 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:16,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:16,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465691936] [2019-10-13 18:02:16,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:16,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:16,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:16,454 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:19,243 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-13 18:02:19,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:19,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-10-13 18:02:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:19,266 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:02:19,266 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:19,275 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-13 18:02:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-13 18:02:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-10-13 18:02:19,377 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 51 [2019-10-13 18:02:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:19,378 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-10-13 18:02:19,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-10-13 18:02:19,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 18:02:19,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:19,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:19,388 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1193901298, now seen corresponding path program 1 times [2019-10-13 18:02:19,389 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:19,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373129053] [2019-10-13 18:02:19,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:19,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:19,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:19,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373129053] [2019-10-13 18:02:19,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702493214] [2019-10-13 18:02:19,839 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 18:02:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:19,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:20,060 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:20,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:20,061 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174852311] [2019-10-13 18:02:20,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:20,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:20,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:20,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:20,064 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-10-13 18:02:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:21,017 INFO L93 Difference]: Finished difference Result 1666 states and 2358 transitions. [2019-10-13 18:02:21,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:21,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2019-10-13 18:02:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:21,028 INFO L225 Difference]: With dead ends: 1666 [2019-10-13 18:02:21,029 INFO L226 Difference]: Without dead ends: 1112 [2019-10-13 18:02:21,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-13 18:02:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-13 18:02:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-13 18:02:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1515 transitions. [2019-10-13 18:02:21,099 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1515 transitions. Word has length 163 [2019-10-13 18:02:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:21,100 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1515 transitions. [2019-10-13 18:02:21,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1515 transitions. [2019-10-13 18:02:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 18:02:21,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:21,106 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:21,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:21,312 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:21,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2142206966, now seen corresponding path program 1 times [2019-10-13 18:02:21,313 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:21,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756363934] [2019-10-13 18:02:21,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:21,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:21,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:21,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756363934] [2019-10-13 18:02:21,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553857954] [2019-10-13 18:02:21,592 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 18:02:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:21,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:21,794 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:21,794 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:21,794 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573044001] [2019-10-13 18:02:21,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:21,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:21,798 INFO L87 Difference]: Start difference. First operand 1112 states and 1515 transitions. Second operand 3 states. [2019-10-13 18:02:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:22,671 INFO L93 Difference]: Finished difference Result 1664 states and 2315 transitions. [2019-10-13 18:02:22,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:22,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-10-13 18:02:22,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:22,682 INFO L225 Difference]: With dead ends: 1664 [2019-10-13 18:02:22,682 INFO L226 Difference]: Without dead ends: 1662 [2019-10-13 18:02:22,683 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:22,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-10-13 18:02:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1296. [2019-10-13 18:02:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2019-10-13 18:02:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1824 transitions. [2019-10-13 18:02:22,736 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1824 transitions. Word has length 181 [2019-10-13 18:02:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:22,737 INFO L462 AbstractCegarLoop]: Abstraction has 1296 states and 1824 transitions. [2019-10-13 18:02:22,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1824 transitions. [2019-10-13 18:02:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-10-13 18:02:22,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:22,744 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, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:22,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:22,957 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash -791937967, now seen corresponding path program 1 times [2019-10-13 18:02:22,959 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:22,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269530407] [2019-10-13 18:02:22,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 148 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:23,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269530407] [2019-10-13 18:02:23,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547327914] [2019-10-13 18:02:23,671 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 18:02:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:23,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:23,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 18:02:24,005 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:24,006 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-13 18:02:24,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194654859] [2019-10-13 18:02:24,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:24,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:24,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:02:24,008 INFO L87 Difference]: Start difference. First operand 1296 states and 1824 transitions. Second operand 5 states. [2019-10-13 18:02:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:25,396 INFO L93 Difference]: Finished difference Result 2982 states and 4167 transitions. [2019-10-13 18:02:25,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:25,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2019-10-13 18:02:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:25,410 INFO L225 Difference]: With dead ends: 2982 [2019-10-13 18:02:25,411 INFO L226 Difference]: Without dead ends: 1692 [2019-10-13 18:02:25,415 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-10-13 18:02:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2019-10-13 18:02:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1684. [2019-10-13 18:02:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1684 states. [2019-10-13 18:02:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2289 transitions. [2019-10-13 18:02:25,491 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2289 transitions. Word has length 236 [2019-10-13 18:02:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:25,492 INFO L462 AbstractCegarLoop]: Abstraction has 1684 states and 2289 transitions. [2019-10-13 18:02:25,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2289 transitions. [2019-10-13 18:02:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-10-13 18:02:25,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:25,500 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:25,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:25,704 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1222821270, now seen corresponding path program 1 times [2019-10-13 18:02:25,709 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:25,709 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976961927] [2019-10-13 18:02:25,709 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:25,709 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:25,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:02:26,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976961927] [2019-10-13 18:02:26,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969115323] [2019-10-13 18:02:26,064 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 [2019-10-13 18:02:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:26,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:26,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:26,294 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:02:26,294 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831827912] [2019-10-13 18:02:26,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:26,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:26,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:26,298 INFO L87 Difference]: Start difference. First operand 1684 states and 2289 transitions. Second operand 11 states. [2019-10-13 18:02:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:28,585 INFO L93 Difference]: Finished difference Result 4196 states and 6313 transitions. [2019-10-13 18:02:28,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 18:02:28,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 263 [2019-10-13 18:02:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:28,610 INFO L225 Difference]: With dead ends: 4196 [2019-10-13 18:02:28,610 INFO L226 Difference]: Without dead ends: 2700 [2019-10-13 18:02:28,615 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2019-10-13 18:02:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2634. [2019-10-13 18:02:28,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2634 states. [2019-10-13 18:02:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3570 transitions. [2019-10-13 18:02:28,726 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3570 transitions. Word has length 263 [2019-10-13 18:02:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:28,727 INFO L462 AbstractCegarLoop]: Abstraction has 2634 states and 3570 transitions. [2019-10-13 18:02:28,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3570 transitions. [2019-10-13 18:02:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-10-13 18:02:28,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:28,745 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, 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, 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] [2019-10-13 18:02:28,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:28,950 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1221316153, now seen corresponding path program 1 times [2019-10-13 18:02:28,951 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:28,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994525049] [2019-10-13 18:02:28,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:28,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:28,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 142 proven. 213 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:30,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994525049] [2019-10-13 18:02:30,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841182391] [2019-10-13 18:02:30,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:30,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:30,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 264 proven. 53 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 18:02:30,434 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:30,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:30,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709426877] [2019-10-13 18:02:30,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:30,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:30,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:30,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:30,437 INFO L87 Difference]: Start difference. First operand 2634 states and 3570 transitions. Second operand 16 states. [2019-10-13 18:02:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:34,552 INFO L93 Difference]: Finished difference Result 5572 states and 7555 transitions. [2019-10-13 18:02:34,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 18:02:34,553 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 320 [2019-10-13 18:02:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:34,568 INFO L225 Difference]: With dead ends: 5572 [2019-10-13 18:02:34,568 INFO L226 Difference]: Without dead ends: 3081 [2019-10-13 18:02:34,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 18:02:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2019-10-13 18:02:34,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 3010. [2019-10-13 18:02:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3010 states. [2019-10-13 18:02:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 3718 transitions. [2019-10-13 18:02:34,725 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 3718 transitions. Word has length 320 [2019-10-13 18:02:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:34,725 INFO L462 AbstractCegarLoop]: Abstraction has 3010 states and 3718 transitions. [2019-10-13 18:02:34,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:02:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 3718 transitions. [2019-10-13 18:02:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-10-13 18:02:34,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:34,734 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:34,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:34,948 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1239300566, now seen corresponding path program 1 times [2019-10-13 18:02:34,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:34,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384202490] [2019-10-13 18:02:34,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:34,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:34,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 233 proven. 85 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 18:02:35,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384202490] [2019-10-13 18:02:35,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038438346] [2019-10-13 18:02:35,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:35,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:02:35,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:35,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:02:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-10-13 18:02:35,845 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:35,846 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-10-13 18:02:35,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715771973] [2019-10-13 18:02:35,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:35,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:35,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:35,849 INFO L87 Difference]: Start difference. First operand 3010 states and 3718 transitions. Second operand 5 states. [2019-10-13 18:02:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:36,993 INFO L93 Difference]: Finished difference Result 6214 states and 7832 transitions. [2019-10-13 18:02:37,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:37,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 345 [2019-10-13 18:02:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:37,016 INFO L225 Difference]: With dead ends: 6214 [2019-10-13 18:02:37,016 INFO L226 Difference]: Without dead ends: 3394 [2019-10-13 18:02:37,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:02:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2019-10-13 18:02:37,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 3388. [2019-10-13 18:02:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3388 states. [2019-10-13 18:02:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4140 transitions. [2019-10-13 18:02:37,105 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4140 transitions. Word has length 345 [2019-10-13 18:02:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:37,105 INFO L462 AbstractCegarLoop]: Abstraction has 3388 states and 4140 transitions. [2019-10-13 18:02:37,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4140 transitions. [2019-10-13 18:02:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2019-10-13 18:02:37,116 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:37,117 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:37,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:37,323 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:37,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1989573846, now seen corresponding path program 1 times [2019-10-13 18:02:37,330 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:37,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821679848] [2019-10-13 18:02:37,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:37,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:37,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 402 proven. 72 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-10-13 18:02:38,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821679848] [2019-10-13 18:02:38,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493783802] [2019-10-13 18:02:38,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:38,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:02:38,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 570 proven. 2 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-13 18:02:38,455 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:38,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:02:38,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596638194] [2019-10-13 18:02:38,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:38,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:38,458 INFO L87 Difference]: Start difference. First operand 3388 states and 4140 transitions. Second operand 9 states. [2019-10-13 18:02:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:40,847 INFO L93 Difference]: Finished difference Result 7520 states and 9257 transitions. [2019-10-13 18:02:40,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:02:40,848 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 455 [2019-10-13 18:02:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:40,865 INFO L225 Difference]: With dead ends: 7520 [2019-10-13 18:02:40,865 INFO L226 Difference]: Without dead ends: 4322 [2019-10-13 18:02:40,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 468 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:02:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2019-10-13 18:02:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 4138. [2019-10-13 18:02:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4138 states. [2019-10-13 18:02:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 4908 transitions. [2019-10-13 18:02:40,997 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 4908 transitions. Word has length 455 [2019-10-13 18:02:40,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:40,998 INFO L462 AbstractCegarLoop]: Abstraction has 4138 states and 4908 transitions. [2019-10-13 18:02:40,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 4908 transitions. [2019-10-13 18:02:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2019-10-13 18:02:41,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:41,018 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:41,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:41,225 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:41,226 INFO L82 PathProgramCache]: Analyzing trace with hash -155868599, now seen corresponding path program 1 times [2019-10-13 18:02:41,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:41,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907634123] [2019-10-13 18:02:41,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:41,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:41,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 538 proven. 81 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-13 18:02:42,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907634123] [2019-10-13 18:02:42,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980562566] [2019-10-13 18:02:42,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:43,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:43,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2019-10-13 18:02:43,315 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:43,315 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2019-10-13 18:02:43,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872178091] [2019-10-13 18:02:43,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:43,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:43,317 INFO L87 Difference]: Start difference. First operand 4138 states and 4908 transitions. Second operand 3 states. [2019-10-13 18:02:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:43,959 INFO L93 Difference]: Finished difference Result 5784 states and 6808 transitions. [2019-10-13 18:02:43,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:43,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 540 [2019-10-13 18:02:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:43,983 INFO L225 Difference]: With dead ends: 5784 [2019-10-13 18:02:43,983 INFO L226 Difference]: Without dead ends: 5782 [2019-10-13 18:02:43,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 553 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5782 states. [2019-10-13 18:02:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5782 to 4322. [2019-10-13 18:02:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4322 states. [2019-10-13 18:02:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5134 transitions. [2019-10-13 18:02:44,083 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5134 transitions. Word has length 540 [2019-10-13 18:02:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:44,084 INFO L462 AbstractCegarLoop]: Abstraction has 4322 states and 5134 transitions. [2019-10-13 18:02:44,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5134 transitions. [2019-10-13 18:02:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2019-10-13 18:02:44,092 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:44,093 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:44,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:44,306 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1921617981, now seen corresponding path program 1 times [2019-10-13 18:02:44,308 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:44,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175988024] [2019-10-13 18:02:44,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:44,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:44,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 538 proven. 80 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2019-10-13 18:02:45,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175988024] [2019-10-13 18:02:45,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548712642] [2019-10-13 18:02:45,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 18:02:45,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:45,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 774 proven. 2 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-10-13 18:02:46,251 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:46,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 16 [2019-10-13 18:02:46,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230400106] [2019-10-13 18:02:46,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:46,253 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:46,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:46,254 INFO L87 Difference]: Start difference. First operand 4322 states and 5134 transitions. Second operand 16 states.