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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:32,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:32,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:32,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:32,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:32,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:32,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:32,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:32,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:32,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:32,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:32,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:32,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:32,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:32,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:32,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:32,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:32,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:32,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:32,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:32,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:32,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:32,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:32,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:32,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:32,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:32,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:32,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:32,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:32,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:32,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:32,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:32,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:32,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:32,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:32,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:32,826 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 18:05:32,859 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:32,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:32,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:32,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:32,861 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:32,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:32,862 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:32,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:32,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:32,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:32,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:32,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:32,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:32,863 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:32,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:32,864 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:32,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:32,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:32,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:32,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:32,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:32,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:32,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:32,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:32,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:32,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:32,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:32,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:32,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:33,200 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:33,220 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:33,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:33,226 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:33,227 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:33,227 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-10-13 18:05:33,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/827c5dd0b/bdca0c2536474aaf9007b510af033541/FLAG5c9ad4b87 [2019-10-13 18:05:33,966 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:33,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-10-13 18:05:33,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/827c5dd0b/bdca0c2536474aaf9007b510af033541/FLAG5c9ad4b87 [2019-10-13 18:05:34,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/827c5dd0b/bdca0c2536474aaf9007b510af033541 [2019-10-13 18:05:34,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:34,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:34,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:34,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:34,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:34,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:34" (1/1) ... [2019-10-13 18:05:34,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a346ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:34, skipping insertion in model container [2019-10-13 18:05:34,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:34" (1/1) ... [2019-10-13 18:05:34,189 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:34,276 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:35,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:35,185 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:35,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:35,554 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:35,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35 WrapperNode [2019-10-13 18:05:35,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:35,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:35,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:35,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:35,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:35,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:35,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:35,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:35,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:35,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:35,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:35,823 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:35,823 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:35,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:35,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:35,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:38,156 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:38,157 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:38,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:38 BoogieIcfgContainer [2019-10-13 18:05:38,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:38,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:38,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:38,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:38,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:34" (1/3) ... [2019-10-13 18:05:38,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1307af71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:38, skipping insertion in model container [2019-10-13 18:05:38,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35" (2/3) ... [2019-10-13 18:05:38,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1307af71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:38, skipping insertion in model container [2019-10-13 18:05:38,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:38" (3/3) ... [2019-10-13 18:05:38,185 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label34.c [2019-10-13 18:05:38,198 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:38,213 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:38,226 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:38,274 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:38,274 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:38,274 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:38,275 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:38,275 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:38,275 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:38,275 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:38,275 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 18:05:38,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:38,327 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] [2019-10-13 18:05:38,329 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:38,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1472830021, now seen corresponding path program 1 times [2019-10-13 18:05:38,348 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:38,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733778797] [2019-10-13 18:05:38,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:38,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:38,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:38,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733778797] [2019-10-13 18:05:38,731 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:38,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:38,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008007342] [2019-10-13 18:05:38,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:38,737 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:38,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:38,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:38,756 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:43,752 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-13 18:05:43,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:43,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2019-10-13 18:05:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:43,789 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:43,789 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:43,803 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 [2019-10-13 18:05:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-13 18:05:43,935 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 40 [2019-10-13 18:05:43,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:43,936 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-13 18:05:43,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-13 18:05:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 18:05:43,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:43,946 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:43,947 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash -111411403, now seen corresponding path program 1 times [2019-10-13 18:05:43,975 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:43,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183992605] [2019-10-13 18:05:43,976 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:43,976 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:43,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:44,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183992605] [2019-10-13 18:05:44,402 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:44,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:44,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148643962] [2019-10-13 18:05:44,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:44,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:44,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:44,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:44,406 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-13 18:05:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:48,500 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-10-13 18:05:48,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:48,500 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-10-13 18:05:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:48,517 INFO L225 Difference]: With dead ends: 3125 [2019-10-13 18:05:48,517 INFO L226 Difference]: Without dead ends: 2100 [2019-10-13 18:05:48,522 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-13 18:05:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-10-13 18:05:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-10-13 18:05:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-10-13 18:05:48,611 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 175 [2019-10-13 18:05:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:48,612 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-10-13 18:05:48,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-10-13 18:05:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-13 18:05:48,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:48,619 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:48,619 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:48,620 INFO L82 PathProgramCache]: Analyzing trace with hash 15236199, now seen corresponding path program 1 times [2019-10-13 18:05:48,620 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:48,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129829336] [2019-10-13 18:05:48,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:48,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:48,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:49,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129829336] [2019-10-13 18:05:49,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271871192] [2019-10-13 18:05:49,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:49,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 18:05:49,291 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:49,291 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:49,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083913132] [2019-10-13 18:05:49,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:49,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:49,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:49,304 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-10-13 18:05:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:51,904 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-10-13 18:05:51,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:51,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2019-10-13 18:05:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:51,939 INFO L225 Difference]: With dead ends: 5192 [2019-10-13 18:05:51,940 INFO L226 Difference]: Without dead ends: 3129 [2019-10-13 18:05:51,946 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-10-13 18:05:52,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-10-13 18:05:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-10-13 18:05:52,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-10-13 18:05:52,055 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 210 [2019-10-13 18:05:52,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:52,057 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-10-13 18:05:52,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-10-13 18:05:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-10-13 18:05:52,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:52,065 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:05:52,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:52,271 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1930172117, now seen corresponding path program 1 times [2019-10-13 18:05:52,272 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:52,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085983516] [2019-10-13 18:05:52,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:52,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:52,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 172 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:05:52,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085983516] [2019-10-13 18:05:52,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109711862] [2019-10-13 18:05:52,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:52,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:52,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 18:05:53,135 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:53,135 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:53,136 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76162241] [2019-10-13 18:05:53,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:53,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:53,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:53,138 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-10-13 18:06:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:01,515 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-10-13 18:06:01,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 18:06:01,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 319 [2019-10-13 18:06:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:01,584 INFO L225 Difference]: With dead ends: 10419 [2019-10-13 18:06:01,584 INFO L226 Difference]: Without dead ends: 6317 [2019-10-13 18:06:01,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:06:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-10-13 18:06:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 5938. [2019-10-13 18:06:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5938 states. [2019-10-13 18:06:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 7568 transitions. [2019-10-13 18:06:01,961 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 7568 transitions. Word has length 319 [2019-10-13 18:06:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:01,963 INFO L462 AbstractCegarLoop]: Abstraction has 5938 states and 7568 transitions. [2019-10-13 18:06:01,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 7568 transitions. [2019-10-13 18:06:01,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2019-10-13 18:06:01,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:01,997 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:06:02,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:02,212 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash 978718812, now seen corresponding path program 1 times [2019-10-13 18:06:02,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:02,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180385498] [2019-10-13 18:06:02,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:02,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:02,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 191 proven. 115 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:06:03,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180385498] [2019-10-13 18:06:03,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805823831] [2019-10-13 18:06:03,341 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 18:06:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:03,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 361 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 18:06:03,773 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:03,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:03,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607224295] [2019-10-13 18:06:03,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:03,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:03,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:03,776 INFO L87 Difference]: Start difference. First operand 5938 states and 7568 transitions. Second operand 11 states. [2019-10-13 18:06:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:09,596 INFO L93 Difference]: Finished difference Result 13329 states and 17710 transitions. [2019-10-13 18:06:09,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:06:09,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 520 [2019-10-13 18:06:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:09,634 INFO L225 Difference]: With dead ends: 13329 [2019-10-13 18:06:09,635 INFO L226 Difference]: Without dead ends: 7009 [2019-10-13 18:06:09,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:06:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2019-10-13 18:06:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 6971. [2019-10-13 18:06:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6971 states. [2019-10-13 18:06:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 7945 transitions. [2019-10-13 18:06:09,913 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 7945 transitions. Word has length 520 [2019-10-13 18:06:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:09,914 INFO L462 AbstractCegarLoop]: Abstraction has 6971 states and 7945 transitions. [2019-10-13 18:06:09,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 7945 transitions. [2019-10-13 18:06:09,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2019-10-13 18:06:09,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:09,960 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, 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, 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] [2019-10-13 18:06:10,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:10,166 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:10,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:10,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1742697075, now seen corresponding path program 1 times [2019-10-13 18:06:10,168 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:10,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040493952] [2019-10-13 18:06:10,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:10,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:10,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat