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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:32,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:32,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:32,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:32,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:32,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:32,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:32,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:32,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:32,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:32,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:32,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:32,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:32,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:32,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:32,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:32,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:32,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:32,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:32,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:32,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:32,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:32,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:32,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:32,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:32,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:32,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:32,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:32,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:02:32,875 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:32,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:32,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:32,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:32,876 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:32,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:32,877 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:32,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:32,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:32,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:32,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:32,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:32,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:32,878 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:32,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:32,879 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:32,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:32,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:32,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:32,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:32,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:32,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:32,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:32,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:32,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:32,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:32,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:32,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:32,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:33,178 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:33,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:33,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:33,203 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:33,203 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:33,204 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-10-14 22:02:33,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3d86b38/e1ac6a56f7184377808df31e89d22693/FLAG8e02f8487 [2019-10-14 22:02:33,904 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:33,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-10-14 22:02:33,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3d86b38/e1ac6a56f7184377808df31e89d22693/FLAG8e02f8487 [2019-10-14 22:02:34,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d3d86b38/e1ac6a56f7184377808df31e89d22693 [2019-10-14 22:02:34,156 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:34,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:34,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:34,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:34,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:34,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:34,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191613fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34, skipping insertion in model container [2019-10-14 22:02:34,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:34,176 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:34,227 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:34,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:34,789 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:34,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:34,957 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:34,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34 WrapperNode [2019-10-14 22:02:34,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:34,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:34,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:34,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:34,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:34,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:34,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:34,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:35,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:35,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:35,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (1/1) ... [2019-10-14 22:02:35,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:35,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:35,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:35,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:35,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:35,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:35,178 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:35,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:36,687 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:36,687 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:36,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:36 BoogieIcfgContainer [2019-10-14 22:02:36,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:36,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:36,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:36,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:36,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:34" (1/3) ... [2019-10-14 22:02:36,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45323431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:36, skipping insertion in model container [2019-10-14 22:02:36,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:34" (2/3) ... [2019-10-14 22:02:36,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45323431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:36, skipping insertion in model container [2019-10-14 22:02:36,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:36" (3/3) ... [2019-10-14 22:02:36,700 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label55.c [2019-10-14 22:02:36,711 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:36,720 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:36,735 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:36,768 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:36,769 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:36,769 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:36,769 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:36,769 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:36,769 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:36,769 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:36,770 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 22:02:36,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:36,808 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:36,810 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash 606791250, now seen corresponding path program 1 times [2019-10-14 22:02:36,828 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:36,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648795367] [2019-10-14 22:02:36,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:36,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:36,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:37,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648795367] [2019-10-14 22:02:37,300 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:37,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:37,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093372571] [2019-10-14 22:02:37,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:37,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:37,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:37,323 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:39,985 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-14 22:02:39,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:39,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-14 22:02:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:40,009 INFO L225 Difference]: With dead ends: 902 [2019-10-14 22:02:40,010 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:40,022 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 [2019-10-14 22:02:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-14 22:02:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-14 22:02:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 812 transitions. [2019-10-14 22:02:40,174 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 812 transitions. Word has length 63 [2019-10-14 22:02:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:40,175 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 812 transitions. [2019-10-14 22:02:40,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:40,177 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 812 transitions. [2019-10-14 22:02:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 22:02:40,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:40,196 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:40,196 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:40,196 INFO L82 PathProgramCache]: Analyzing trace with hash 905975074, now seen corresponding path program 1 times [2019-10-14 22:02:40,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:40,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436711796] [2019-10-14 22:02:40,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:40,200 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:40,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:40,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436711796] [2019-10-14 22:02:40,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221094994] [2019-10-14 22:02:40,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:40,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:40,834 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:40,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:40,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980378306] [2019-10-14 22:02:40,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:40,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:40,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:40,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:40,838 INFO L87 Difference]: Start difference. First operand 560 states and 812 transitions. Second operand 3 states. [2019-10-14 22:02:41,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:41,707 INFO L93 Difference]: Finished difference Result 1666 states and 2449 transitions. [2019-10-14 22:02:41,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:41,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-10-14 22:02:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:41,716 INFO L225 Difference]: With dead ends: 1666 [2019-10-14 22:02:41,716 INFO L226 Difference]: Without dead ends: 1112 [2019-10-14 22:02:41,719 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-14 22:02:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-14 22:02:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-14 22:02:41,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1563 transitions. [2019-10-14 22:02:41,758 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1563 transitions. Word has length 175 [2019-10-14 22:02:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:41,759 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1563 transitions. [2019-10-14 22:02:41,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1563 transitions. [2019-10-14 22:02:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 22:02:41,798 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:41,798 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:41,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:42,001 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1147690534, now seen corresponding path program 1 times [2019-10-14 22:02:42,002 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:42,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541586988] [2019-10-14 22:02:42,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:42,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:42,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:42,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541586988] [2019-10-14 22:02:42,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915704294] [2019-10-14 22:02:42,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:42,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:42,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:42,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:42,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199806797] [2019-10-14 22:02:42,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:42,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:42,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:42,423 INFO L87 Difference]: Start difference. First operand 1112 states and 1563 transitions. Second operand 3 states. [2019-10-14 22:02:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:43,399 INFO L93 Difference]: Finished difference Result 3138 states and 4515 transitions. [2019-10-14 22:02:43,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:43,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2019-10-14 22:02:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:43,412 INFO L225 Difference]: With dead ends: 3138 [2019-10-14 22:02:43,412 INFO L226 Difference]: Without dead ends: 2032 [2019-10-14 22:02:43,416 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-10-14 22:02:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2019-10-14 22:02:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2032 states. [2019-10-14 22:02:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2761 transitions. [2019-10-14 22:02:43,486 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2761 transitions. Word has length 193 [2019-10-14 22:02:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:43,488 INFO L462 AbstractCegarLoop]: Abstraction has 2032 states and 2761 transitions. [2019-10-14 22:02:43,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2761 transitions. [2019-10-14 22:02:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 22:02:43,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:43,496 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:02:43,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:43,701 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash -326826355, now seen corresponding path program 1 times [2019-10-14 22:02:43,702 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:43,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41736546] [2019-10-14 22:02:43,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:43,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:43,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:44,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41736546] [2019-10-14 22:02:44,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35851421] [2019-10-14 22:02:44,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:44,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:44,236 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:44,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:02:44,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144308176] [2019-10-14 22:02:44,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:02:44,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:44,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:02:44,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:02:44,239 INFO L87 Difference]: Start difference. First operand 2032 states and 2761 transitions. Second operand 11 states. [2019-10-14 22:02:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:51,755 INFO L93 Difference]: Finished difference Result 7284 states and 12592 transitions. [2019-10-14 22:02:51,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-14 22:02:51,755 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 222 [2019-10-14 22:02:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:51,801 INFO L225 Difference]: With dead ends: 7284 [2019-10-14 22:02:51,802 INFO L226 Difference]: Without dead ends: 4270 [2019-10-14 22:02:51,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=1675, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 22:02:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2019-10-14 22:02:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 4022. [2019-10-14 22:02:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2019-10-14 22:02:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5751 transitions. [2019-10-14 22:02:51,998 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5751 transitions. Word has length 222 [2019-10-14 22:02:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:51,999 INFO L462 AbstractCegarLoop]: Abstraction has 4022 states and 5751 transitions. [2019-10-14 22:02:51,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:02:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5751 transitions. [2019-10-14 22:02:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-10-14 22:02:52,007 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:52,007 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:02:52,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:52,212 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash 718952513, now seen corresponding path program 1 times [2019-10-14 22:02:52,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:52,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213610641] [2019-10-14 22:02:52,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 22:02:52,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213610641] [2019-10-14 22:02:52,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285522012] [2019-10-14 22:02:52,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:52,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:02:52,876 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:52,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-10-14 22:02:52,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202684567] [2019-10-14 22:02:52,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:52,878 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:52,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:52,878 INFO L87 Difference]: Start difference. First operand 4022 states and 5751 transitions. Second operand 3 states. [2019-10-14 22:02:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:53,722 INFO L93 Difference]: Finished difference Result 8992 states and 13296 transitions. [2019-10-14 22:02:53,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:53,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 248 [2019-10-14 22:02:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:53,760 INFO L225 Difference]: With dead ends: 8992 [2019-10-14 22:02:53,760 INFO L226 Difference]: Without dead ends: 4976 [2019-10-14 22:02:53,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2019-10-14 22:02:53,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4976. [2019-10-14 22:02:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4976 states. [2019-10-14 22:02:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4976 states to 4976 states and 7174 transitions. [2019-10-14 22:02:53,943 INFO L78 Accepts]: Start accepts. Automaton has 4976 states and 7174 transitions. Word has length 248 [2019-10-14 22:02:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:53,943 INFO L462 AbstractCegarLoop]: Abstraction has 4976 states and 7174 transitions. [2019-10-14 22:02:53,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4976 states and 7174 transitions. [2019-10-14 22:02:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-10-14 22:02:53,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:53,959 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:54,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:54,173 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:54,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:54,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1823817087, now seen corresponding path program 1 times [2019-10-14 22:02:54,174 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:54,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346663007] [2019-10-14 22:02:54,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:54,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:54,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-10-14 22:02:54,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346663007] [2019-10-14 22:02:54,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512005492] [2019-10-14 22:02:54,539 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 [2019-10-14 22:02:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:54,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:54,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 22:02:54,688 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:54,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 22:02:54,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397625007] [2019-10-14 22:02:54,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:54,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:54,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:54,690 INFO L87 Difference]: Start difference. First operand 4976 states and 7174 transitions. Second operand 3 states. [2019-10-14 22:02:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:55,633 INFO L93 Difference]: Finished difference Result 10628 states and 15311 transitions. [2019-10-14 22:02:55,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:55,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 280 [2019-10-14 22:02:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:55,720 INFO L225 Difference]: With dead ends: 10628 [2019-10-14 22:02:55,720 INFO L226 Difference]: Without dead ends: 5730 [2019-10-14 22:02:55,731 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2019-10-14 22:02:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 5540. [2019-10-14 22:02:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5540 states. [2019-10-14 22:02:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 8221 transitions. [2019-10-14 22:02:55,919 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 8221 transitions. Word has length 280 [2019-10-14 22:02:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:55,920 INFO L462 AbstractCegarLoop]: Abstraction has 5540 states and 8221 transitions. [2019-10-14 22:02:55,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 8221 transitions. [2019-10-14 22:02:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-10-14 22:02:55,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:55,936 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:56,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:56,141 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:56,141 INFO L82 PathProgramCache]: Analyzing trace with hash -366566147, now seen corresponding path program 1 times [2019-10-14 22:02:56,142 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:56,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488185161] [2019-10-14 22:02:56,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:56,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:56,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 163 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:57,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488185161] [2019-10-14 22:02:57,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079315560] [2019-10-14 22:02:57,298 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 [2019-10-14 22:02:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:57,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:57,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-14 22:02:57,576 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:57,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-14 22:02:57,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164479259] [2019-10-14 22:02:57,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:57,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:57,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:02:57,578 INFO L87 Difference]: Start difference. First operand 5540 states and 8221 transitions. Second operand 5 states. [2019-10-14 22:02:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:58,892 INFO L93 Difference]: Finished difference Result 11654 states and 17270 transitions. [2019-10-14 22:02:58,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:58,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 294 [2019-10-14 22:02:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:58,924 INFO L225 Difference]: With dead ends: 11654 [2019-10-14 22:02:58,925 INFO L226 Difference]: Without dead ends: 6120 [2019-10-14 22:02:58,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:02:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6120 states. [2019-10-14 22:02:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6120 to 6116. [2019-10-14 22:02:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6116 states. [2019-10-14 22:02:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 8955 transitions. [2019-10-14 22:02:59,127 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 8955 transitions. Word has length 294 [2019-10-14 22:02:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:59,127 INFO L462 AbstractCegarLoop]: Abstraction has 6116 states and 8955 transitions. [2019-10-14 22:02:59,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 8955 transitions. [2019-10-14 22:02:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2019-10-14 22:02:59,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:59,153 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:59,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:59,360 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash -176257439, now seen corresponding path program 1 times [2019-10-14 22:02:59,361 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:59,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708324120] [2019-10-14 22:02:59,361 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:59,361 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:59,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 168 proven. 130 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-14 22:02:59,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708324120] [2019-10-14 22:02:59,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340278237] [2019-10-14 22:02:59,698 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 [2019-10-14 22:02:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:59,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-14 22:02:59,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:59,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-14 22:02:59,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343714078] [2019-10-14 22:02:59,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:59,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:59,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:59,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:59,987 INFO L87 Difference]: Start difference. First operand 6116 states and 8955 transitions. Second operand 5 states. [2019-10-14 22:03:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:01,138 INFO L93 Difference]: Finished difference Result 11192 states and 15949 transitions. [2019-10-14 22:03:01,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:01,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 364 [2019-10-14 22:03:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:01,170 INFO L225 Difference]: With dead ends: 11192 [2019-10-14 22:03:01,170 INFO L226 Difference]: Without dead ends: 5448 [2019-10-14 22:03:01,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:03:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2019-10-14 22:03:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 5218. [2019-10-14 22:03:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5218 states. [2019-10-14 22:03:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 6538 transitions. [2019-10-14 22:03:01,301 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 6538 transitions. Word has length 364 [2019-10-14 22:03:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:01,302 INFO L462 AbstractCegarLoop]: Abstraction has 5218 states and 6538 transitions. [2019-10-14 22:03:01,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 6538 transitions. [2019-10-14 22:03:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2019-10-14 22:03:01,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:01,314 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, 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, 2, 2, 2, 2, 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] [2019-10-14 22:03:01,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:01,518 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1917381211, now seen corresponding path program 1 times [2019-10-14 22:03:01,520 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:01,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793497916] [2019-10-14 22:03:01,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:01,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:01,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 178 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:03:02,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793497916] [2019-10-14 22:03:02,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489931702] [2019-10-14 22:03:02,942 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 [2019-10-14 22:03:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:03:03,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:03,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:03:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 338 proven. 53 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-14 22:03:03,389 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:03,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:03:03,389 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652434308] [2019-10-14 22:03:03,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:03:03,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:03,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:03:03,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:03:03,391 INFO L87 Difference]: Start difference. First operand 5218 states and 6538 transitions. Second operand 16 states. [2019-10-14 22:03:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:06,878 INFO L93 Difference]: Finished difference Result 10554 states and 13248 transitions. [2019-10-14 22:03:06,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:03:06,879 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 378 [2019-10-14 22:03:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:06,894 INFO L225 Difference]: With dead ends: 10554 [2019-10-14 22:03:06,894 INFO L226 Difference]: Without dead ends: 5475 [2019-10-14 22:03:06,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:03:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2019-10-14 22:03:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 5406. [2019-10-14 22:03:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5406 states. [2019-10-14 22:03:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 6331 transitions. [2019-10-14 22:03:07,007 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 6331 transitions. Word has length 378 [2019-10-14 22:03:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:07,008 INFO L462 AbstractCegarLoop]: Abstraction has 5406 states and 6331 transitions. [2019-10-14 22:03:07,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:03:07,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 6331 transitions. [2019-10-14 22:03:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2019-10-14 22:03:07,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:07,033 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:07,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:07,246 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1222870619, now seen corresponding path program 1 times [2019-10-14 22:03:07,247 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:07,248 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683727888] [2019-10-14 22:03:07,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:07,248 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:07,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 414 proven. 115 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2019-10-14 22:03:08,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683727888] [2019-10-14 22:03:08,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742830741] [2019-10-14 22:03:08,531 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 [2019-10-14 22:03:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:03:08,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:08,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:03:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2019-10-14 22:03:08,978 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:08,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-14 22:03:08,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548077932] [2019-10-14 22:03:08,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:08,980 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:03:08,981 INFO L87 Difference]: Start difference. First operand 5406 states and 6331 transitions. Second operand 5 states.