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/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 03:18:09,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 03:18:09,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 03:18:09,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 03:18:09,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 03:18:09,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 03:18:09,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 03:18:09,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 03:18:09,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 03:18:09,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 03:18:09,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 03:18:09,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 03:18:09,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 03:18:09,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 03:18:09,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 03:18:09,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 03:18:09,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 03:18:09,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 03:18:09,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 03:18:09,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 03:18:09,961 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 [2019-09-08 03:18:09,984 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 03:18:09,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 03:18:09,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 03:18:09,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 03:18:09,986 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 03:18:09,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 03:18:09,986 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 03:18:09,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 03:18:09,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 03:18:09,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 03:18:09,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 03:18:09,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 03:18:09,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 03:18:09,988 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 03:18:09,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 03:18:09,988 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 03:18:09,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 03:18:09,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 03:18:09,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 03:18:09,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 03:18:09,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 03:18:09,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:18:09,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 03:18:09,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 03:18:09,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 03:18:09,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 03:18:09,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 03:18:09,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 03:18:09,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 03:18:10,047 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 03:18:10,059 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 03:18:10,066 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 03:18:10,068 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 03:18:10,068 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 03:18:10,069 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2019-09-08 03:18:10,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6858205b1/1f5d4b74534a4641899484d7b6c76f79/FLAGdee23e3ff [2019-09-08 03:18:10,516 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 03:18:10,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2019-09-08 03:18:10,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6858205b1/1f5d4b74534a4641899484d7b6c76f79/FLAGdee23e3ff [2019-09-08 03:18:10,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6858205b1/1f5d4b74534a4641899484d7b6c76f79 [2019-09-08 03:18:10,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 03:18:10,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 03:18:10,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 03:18:10,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 03:18:10,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 03:18:10,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:18:10" (1/1) ... [2019-09-08 03:18:10,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1140be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:10, skipping insertion in model container [2019-09-08 03:18:10,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:18:10" (1/1) ... [2019-09-08 03:18:10,918 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 03:18:10,939 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 03:18:11,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:18:11,121 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 03:18:11,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:18:11,150 INFO L192 MainTranslator]: Completed translation [2019-09-08 03:18:11,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11 WrapperNode [2019-09-08 03:18:11,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 03:18:11,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 03:18:11,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 03:18:11,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 03:18:11,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (1/1) ... [2019-09-08 03:18:11,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (1/1) ... [2019-09-08 03:18:11,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (1/1) ... [2019-09-08 03:18:11,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (1/1) ... [2019-09-08 03:18:11,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (1/1) ... [2019-09-08 03:18:11,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (1/1) ... [2019-09-08 03:18:11,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (1/1) ... [2019-09-08 03:18:11,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 03:18:11,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 03:18:11,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 03:18:11,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 03:18:11,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (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 [2019-09-08 03:18:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 03:18:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 03:18:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-08 03:18:11,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 03:18:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 03:18:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 03:18:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 03:18:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 03:18:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 03:18:11,537 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 03:18:11,538 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-08 03:18:11,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:18:11 BoogieIcfgContainer [2019-09-08 03:18:11,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 03:18:11,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 03:18:11,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 03:18:11,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 03:18:11,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 03:18:10" (1/3) ... [2019-09-08 03:18:11,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b53b06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:18:11, skipping insertion in model container [2019-09-08 03:18:11,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:18:11" (2/3) ... [2019-09-08 03:18:11,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b53b06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:18:11, skipping insertion in model container [2019-09-08 03:18:11,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:18:11" (3/3) ... [2019-09-08 03:18:11,565 INFO L109 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2019-09-08 03:18:11,596 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 03:18:11,611 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 03:18:11,644 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 03:18:11,667 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 03:18:11,667 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 03:18:11,668 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 03:18:11,668 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 03:18:11,668 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 03:18:11,668 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 03:18:11,668 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 03:18:11,668 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 03:18:11,668 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 03:18:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-09-08 03:18:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 03:18:11,689 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:11,690 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:11,692 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:11,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1303616190, now seen corresponding path program 1 times [2019-09-08 03:18:11,698 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:11,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:11,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:11,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:11,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:11,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:18:11,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-08 03:18:11,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-08 03:18:11,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-08 03:18:11,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 03:18:11,816 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-09-08 03:18:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:11,837 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2019-09-08 03:18:11,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-08 03:18:11,838 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-08 03:18:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:11,846 INFO L225 Difference]: With dead ends: 41 [2019-09-08 03:18:11,847 INFO L226 Difference]: Without dead ends: 19 [2019-09-08 03:18:11,850 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 03:18:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-08 03:18:11,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-08 03:18:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-08 03:18:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-09-08 03:18:11,893 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2019-09-08 03:18:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:11,894 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-09-08 03:18:11,894 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-08 03:18:11,894 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-09-08 03:18:11,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-08 03:18:11,895 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:11,895 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:11,896 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:11,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1274063518, now seen corresponding path program 1 times [2019-09-08 03:18:11,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:11,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:11,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:11,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:11,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:12,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:18:12,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-08 03:18:12,060 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-08 03:18:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-08 03:18:12,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:18:12,061 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2019-09-08 03:18:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:12,098 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-09-08 03:18:12,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-08 03:18:12,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-08 03:18:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:12,101 INFO L225 Difference]: With dead ends: 33 [2019-09-08 03:18:12,101 INFO L226 Difference]: Without dead ends: 26 [2019-09-08 03:18:12,104 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:18:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-08 03:18:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2019-09-08 03:18:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-08 03:18:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-09-08 03:18:12,122 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2019-09-08 03:18:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:12,123 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-09-08 03:18:12,124 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-08 03:18:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-09-08 03:18:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-08 03:18:12,125 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:12,125 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:12,126 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:12,127 INFO L82 PathProgramCache]: Analyzing trace with hash 856543284, now seen corresponding path program 1 times [2019-09-08 03:18:12,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:12,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:12,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:12,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:12,227 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:18:12,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-08 03:18:12,228 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-08 03:18:12,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-08 03:18:12,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:18:12,229 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-09-08 03:18:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:12,256 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-09-08 03:18:12,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-08 03:18:12,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-09-08 03:18:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:12,258 INFO L225 Difference]: With dead ends: 38 [2019-09-08 03:18:12,258 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 03:18:12,259 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:18:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 03:18:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-09-08 03:18:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 03:18:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 03:18:12,265 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2019-09-08 03:18:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:12,266 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 03:18:12,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-08 03:18:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 03:18:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-08 03:18:12,267 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:12,267 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:12,267 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:12,268 INFO L82 PathProgramCache]: Analyzing trace with hash 808417067, now seen corresponding path program 1 times [2019-09-08 03:18:12,268 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:12,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:12,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:12,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:12,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:18:12,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-08 03:18:12,337 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-08 03:18:12,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-08 03:18:12,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:18:12,338 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-09-08 03:18:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:12,352 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-09-08 03:18:12,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-08 03:18:12,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-09-08 03:18:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:12,354 INFO L225 Difference]: With dead ends: 38 [2019-09-08 03:18:12,354 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 03:18:12,355 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-08 03:18:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 03:18:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-09-08 03:18:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-08 03:18:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-09-08 03:18:12,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2019-09-08 03:18:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:12,362 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-09-08 03:18:12,362 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-08 03:18:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-09-08 03:18:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 03:18:12,363 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:12,363 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:12,363 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:12,364 INFO L82 PathProgramCache]: Analyzing trace with hash -681648618, now seen corresponding path program 1 times [2019-09-08 03:18:12,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:12,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:12,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:12,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:12,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:18:12,437 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:18:12,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:12,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-08 03:18:12,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:12,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:18:12,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-08 03:18:12,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 03:18:12,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 03:18:12,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-08 03:18:12,534 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2019-09-08 03:18:12,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:12,578 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2019-09-08 03:18:12,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-08 03:18:12,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 03:18:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:12,582 INFO L225 Difference]: With dead ends: 40 [2019-09-08 03:18:12,582 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 03:18:12,583 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-08 03:18:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 03:18:12,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-09-08 03:18:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 03:18:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-08 03:18:12,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2019-09-08 03:18:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:12,593 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-08 03:18:12,594 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 03:18:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-08 03:18:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 03:18:12,595 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:12,595 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:12,595 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash 370955403, now seen corresponding path program 2 times [2019-09-08 03:18:12,596 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:12,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:12,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:12,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:12,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:18:12,722 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:18:12,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:18:12,767 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:18:12,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:12,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-08 03:18:12,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:12,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:18:12,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-08 03:18:12,803 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 03:18:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 03:18:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-08 03:18:12,804 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2019-09-08 03:18:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:12,847 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-09-08 03:18:12,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 03:18:12,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-09-08 03:18:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:12,849 INFO L225 Difference]: With dead ends: 42 [2019-09-08 03:18:12,849 INFO L226 Difference]: Without dead ends: 25 [2019-09-08 03:18:12,850 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-08 03:18:12,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-08 03:18:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-08 03:18:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 03:18:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-08 03:18:12,856 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2019-09-08 03:18:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:12,856 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-08 03:18:12,857 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 03:18:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-08 03:18:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-08 03:18:12,857 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:12,858 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:12,858 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:12,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1358058314, now seen corresponding path program 3 times [2019-09-08 03:18:12,859 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:12,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:12,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:12,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:12,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:18:12,961 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:18:12,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:18:13,014 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-08 03:18:13,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:13,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 03:18:13,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:13,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:13,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:13,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:13,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:13,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 03:18:20,999 WARN L188 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 43 DAG size of output: 19 [2019-09-08 03:18:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-08 03:18:21,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-08 03:18:21,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2019-09-08 03:18:21,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:18:21,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:18:21,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2019-09-08 03:18:21,430 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2019-09-08 03:18:26,129 WARN L188 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 24 [2019-09-08 03:18:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:28,573 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2019-09-08 03:18:28,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 03:18:28,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-09-08 03:18:28,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:28,574 INFO L225 Difference]: With dead ends: 48 [2019-09-08 03:18:28,574 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 03:18:28,575 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=33, Invalid=97, Unknown=2, NotChecked=0, Total=132 [2019-09-08 03:18:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 03:18:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-08 03:18:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-08 03:18:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-09-08 03:18:28,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 15 [2019-09-08 03:18:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:28,581 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-09-08 03:18:28,581 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:18:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-09-08 03:18:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-08 03:18:28,582 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:28,582 INFO L399 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:28,582 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:28,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1842253067, now seen corresponding path program 1 times [2019-09-08 03:18:28,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:28,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:28,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:28,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:28,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:18:28,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:18:28,702 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:18:28,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:28,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 03:18:28,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-08 03:18:28,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:18:28,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-09-08 03:18:28,802 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 03:18:28,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 03:18:28,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:18:28,803 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 11 states. [2019-09-08 03:18:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:29,020 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2019-09-08 03:18:29,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 03:18:29,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-09-08 03:18:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:29,022 INFO L225 Difference]: With dead ends: 71 [2019-09-08 03:18:29,022 INFO L226 Difference]: Without dead ends: 48 [2019-09-08 03:18:29,023 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:18:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-08 03:18:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-09-08 03:18:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 03:18:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-09-08 03:18:29,031 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2019-09-08 03:18:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:29,031 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-09-08 03:18:29,032 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 03:18:29,032 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-09-08 03:18:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 03:18:29,033 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:29,033 INFO L399 BasicCegarLoop]: trace histogram [10, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:29,033 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1414909940, now seen corresponding path program 2 times [2019-09-08 03:18:29,034 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:29,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:29,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:29,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:18:29,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-08 03:18:29,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:18:29,158 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:18:29,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:18:29,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:18:29,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:18:29,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 03:18:29,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:18:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-08 03:18:29,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:18:29,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-08 03:18:29,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 03:18:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 03:18:29,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:18:29,308 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 14 states. [2019-09-08 03:18:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:18:29,766 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2019-09-08 03:18:29,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-08 03:18:29,766 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2019-09-08 03:18:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:18:29,767 INFO L225 Difference]: With dead ends: 94 [2019-09-08 03:18:29,767 INFO L226 Difference]: Without dead ends: 61 [2019-09-08 03:18:29,771 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2019-09-08 03:18:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-08 03:18:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2019-09-08 03:18:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 03:18:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-09-08 03:18:29,786 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 37 [2019-09-08 03:18:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:18:29,787 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-09-08 03:18:29,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 03:18:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-09-08 03:18:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-08 03:18:29,794 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:18:29,794 INFO L399 BasicCegarLoop]: trace histogram [18, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:18:29,794 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:18:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:18:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash 62743319, now seen corresponding path program 3 times [2019-09-08 03:18:29,795 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:18:29,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:18:29,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:29,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:18:29,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:18:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 107 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-09-08 03:18:29,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:18:29,968 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:18:29,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:19:10,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-08 03:19:10,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:19:11,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 03:19:11,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:19:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-09-08 03:19:11,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:19:11,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-08 03:19:11,695 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:19:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:19:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:19:11,696 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 10 states. [2019-09-08 03:19:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:19:11,749 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2019-09-08 03:19:11,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 03:19:11,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-09-08 03:19:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:19:11,751 INFO L225 Difference]: With dead ends: 100 [2019-09-08 03:19:11,751 INFO L226 Difference]: Without dead ends: 55 [2019-09-08 03:19:11,752 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:19:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-08 03:19:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-08 03:19:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 03:19:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-09-08 03:19:11,768 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 53 [2019-09-08 03:19:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:19:11,770 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-09-08 03:19:11,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:19:11,770 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-09-08 03:19:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-08 03:19:11,774 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:19:11,774 INFO L399 BasicCegarLoop]: trace histogram [21, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:19:11,774 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:19:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:19:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1860941642, now seen corresponding path program 4 times [2019-09-08 03:19:11,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:19:11,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:19:11,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:11,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:19:11,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:19:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 137 proven. 28 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-09-08 03:19:11,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:19:11,957 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:19:11,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:19:12,002 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:19:12,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:19:12,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 03:19:12,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:19:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 6 proven. 226 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-09-08 03:19:12,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:19:12,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-09-08 03:19:12,144 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 03:19:12,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 03:19:12,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:19:12,145 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 18 states. [2019-09-08 03:19:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:19:12,909 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2019-09-08 03:19:12,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-08 03:19:12,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2019-09-08 03:19:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:19:12,911 INFO L225 Difference]: With dead ends: 129 [2019-09-08 03:19:12,911 INFO L226 Difference]: Without dead ends: 81 [2019-09-08 03:19:12,913 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 03:19:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-08 03:19:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 69. [2019-09-08 03:19:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 03:19:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2019-09-08 03:19:12,924 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 56 [2019-09-08 03:19:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:19:12,924 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2019-09-08 03:19:12,924 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 03:19:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2019-09-08 03:19:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-08 03:19:12,926 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:19:12,926 INFO L399 BasicCegarLoop]: trace histogram [32, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:19:12,926 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:19:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:19:12,927 INFO L82 PathProgramCache]: Analyzing trace with hash -330095560, now seen corresponding path program 5 times [2019-09-08 03:19:12,927 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:19:12,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:19:12,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:12,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:19:12,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:19:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 255 proven. 36 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2019-09-08 03:19:13,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:19:13,063 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:19:13,080 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:19:47,148 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-08 03:19:47,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:19:47,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 03:19:47,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:19:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 431 proven. 36 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Stream closed [2019-09-08 03:19:47,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:19:47,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-08 03:19:47,433 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 03:19:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 03:19:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:19:47,434 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 12 states. [2019-09-08 03:19:47,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:19:47,523 INFO L93 Difference]: Finished difference Result 137 states and 159 transitions. [2019-09-08 03:19:47,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 03:19:47,524 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2019-09-08 03:19:47,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:19:47,525 INFO L225 Difference]: With dead ends: 137 [2019-09-08 03:19:47,525 INFO L226 Difference]: Without dead ends: 74 [2019-09-08 03:19:47,526 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 03:19:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-08 03:19:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-09-08 03:19:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-08 03:19:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-09-08 03:19:47,537 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 75 [2019-09-08 03:19:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:19:47,537 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-09-08 03:19:47,537 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 03:19:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-09-08 03:19:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 03:19:47,538 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:19:47,538 INFO L399 BasicCegarLoop]: trace histogram [36, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:19:47,539 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:19:47,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:19:47,539 INFO L82 PathProgramCache]: Analyzing trace with hash -936778316, now seen corresponding path program 6 times [2019-09-08 03:19:47,539 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:19:47,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:19:47,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:47,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:19:47,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:19:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:19:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 312 proven. 45 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-09-08 03:19:47,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:19:47,701 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:19:47,728 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:20:25,352 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-09-08 03:20:25,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:20:25,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-08 03:20:25,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:20:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 526 proven. 45 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-09-08 03:20:25,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:20:25,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-08 03:20:25,481 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 03:20:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 03:20:25,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:20:25,482 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 13 states. [2019-09-08 03:20:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:20:25,594 INFO L93 Difference]: Finished difference Result 145 states and 167 transitions. [2019-09-08 03:20:25,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 03:20:25,599 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-09-08 03:20:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:20:25,601 INFO L225 Difference]: With dead ends: 145 [2019-09-08 03:20:25,602 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 03:20:25,604 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 03:20:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 03:20:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-09-08 03:20:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-08 03:20:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-09-08 03:20:25,629 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 79 [2019-09-08 03:20:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:20:25,630 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-09-08 03:20:25,630 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 03:20:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-09-08 03:20:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-08 03:20:25,631 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:20:25,631 INFO L399 BasicCegarLoop]: trace histogram [40, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:20:25,631 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:20:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:20:25,631 INFO L82 PathProgramCache]: Analyzing trace with hash 464708920, now seen corresponding path program 7 times [2019-09-08 03:20:25,632 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:20:25,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:20:25,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:20:25,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:20:25,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:20:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:20:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 375 proven. 55 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2019-09-08 03:20:25,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:20:25,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:20:25,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:20:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:20:25,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 03:20:25,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:20:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 8 proven. 788 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-09-08 03:20:26,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:20:26,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-08 03:20:26,114 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 03:20:26,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 03:20:26,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:20:26,116 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 23 states. [2019-09-08 03:20:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:20:27,700 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2019-09-08 03:20:27,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-08 03:20:27,702 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 83 [2019-09-08 03:20:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:20:27,703 INFO L225 Difference]: With dead ends: 182 [2019-09-08 03:20:27,703 INFO L226 Difference]: Without dead ends: 111 [2019-09-08 03:20:27,705 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=4893, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 03:20:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-08 03:20:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2019-09-08 03:20:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-08 03:20:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2019-09-08 03:20:27,718 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 83 [2019-09-08 03:20:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:20:27,718 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2019-09-08 03:20:27,718 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 03:20:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2019-09-08 03:20:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-08 03:20:27,719 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:20:27,719 INFO L399 BasicCegarLoop]: trace histogram [55, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:20:27,719 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:20:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:20:27,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1946074422, now seen corresponding path program 8 times [2019-09-08 03:20:27,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:20:27,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:20:27,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:20:27,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:20:27,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:20:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:20:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 591 proven. 66 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2019-09-08 03:20:27,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:20:27,922 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:20:27,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:20:27,988 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:20:27,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:20:27,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 03:20:27,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:20:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 10 proven. 1526 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-09-08 03:20:28,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:20:28,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-09-08 03:20:28,245 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 03:20:28,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 03:20:28,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:20:28,247 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 26 states. [2019-09-08 03:20:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:20:30,327 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2019-09-08 03:20:30,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-08 03:20:30,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 106 [2019-09-08 03:20:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:20:30,329 INFO L225 Difference]: With dead ends: 223 [2019-09-08 03:20:30,329 INFO L226 Difference]: Without dead ends: 133 [2019-09-08 03:20:30,332 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=468, Invalid=7904, Unknown=0, NotChecked=0, Total=8372 [2019-09-08 03:20:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-08 03:20:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 117. [2019-09-08 03:20:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-08 03:20:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2019-09-08 03:20:30,345 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 106 [2019-09-08 03:20:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:20:30,346 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2019-09-08 03:20:30,346 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 03:20:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2019-09-08 03:20:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-08 03:20:30,347 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:20:30,347 INFO L399 BasicCegarLoop]: trace histogram [72, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:20:30,348 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:20:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:20:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1245127226, now seen corresponding path program 9 times [2019-09-08 03:20:30,348 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:20:30,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:20:30,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:20:30,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:20:30,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:20:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:20:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3126 backedges. 863 proven. 78 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2019-09-08 03:20:30,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:20:30,585 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:20:30,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:21:54,169 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-08 03:21:54,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:21:55,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-08 03:21:55,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:21:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3126 backedges. 851 proven. 78 refuted. 0 times theorem prover too weak. 2197 trivial. 0 not checked. [2019-09-08 03:21:55,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:21:55,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-08 03:21:55,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 03:21:55,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 03:21:55,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:21:55,377 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand 16 states. [2019-09-08 03:21:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:21:55,528 INFO L93 Difference]: Finished difference Result 235 states and 267 transitions. [2019-09-08 03:21:55,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 03:21:55,529 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 131 [2019-09-08 03:21:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:21:55,530 INFO L225 Difference]: With dead ends: 235 [2019-09-08 03:21:55,530 INFO L226 Difference]: Without dead ends: 124 [2019-09-08 03:21:55,531 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-08 03:21:55,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-08 03:21:55,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2019-09-08 03:21:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-09-08 03:21:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2019-09-08 03:21:55,543 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 131 [2019-09-08 03:21:55,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:21:55,544 INFO L475 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2019-09-08 03:21:55,544 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 03:21:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2019-09-08 03:21:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-08 03:21:55,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:21:55,546 INFO L399 BasicCegarLoop]: trace histogram [78, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:21:55,546 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:21:55,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:21:55,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1556197004, now seen corresponding path program 10 times [2019-09-08 03:21:55,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:21:55,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:21:55,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:55,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:21:55,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:21:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3609 backedges. 998 proven. 91 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2019-09-08 03:21:55,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:21:55,808 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:21:55,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:21:55,884 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:21:55,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:21:55,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 03:21:55,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:21:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3609 backedges. 12 proven. 3061 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2019-09-08 03:21:56,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:21:56,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2019-09-08 03:21:56,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 03:21:56,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 03:21:56,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2019-09-08 03:21:56,204 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 30 states. [2019-09-08 03:21:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:21:59,458 INFO L93 Difference]: Finished difference Result 282 states and 321 transitions. [2019-09-08 03:21:59,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2019-09-08 03:21:59,458 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 137 [2019-09-08 03:21:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:21:59,460 INFO L225 Difference]: With dead ends: 282 [2019-09-08 03:21:59,460 INFO L226 Difference]: Without dead ends: 165 [2019-09-08 03:21:59,468 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4816 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=630, Invalid=13890, Unknown=0, NotChecked=0, Total=14520 [2019-09-08 03:21:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-09-08 03:21:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 147. [2019-09-08 03:21:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-08 03:21:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2019-09-08 03:21:59,489 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 137 [2019-09-08 03:21:59,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:21:59,489 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2019-09-08 03:21:59,489 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 03:21:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2019-09-08 03:21:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-08 03:21:59,491 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:21:59,491 INFO L399 BasicCegarLoop]: trace histogram [98, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:21:59,492 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:21:59,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:21:59,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1842558363, now seen corresponding path program 11 times [2019-09-08 03:21:59,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:21:59,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:21:59,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:59,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:21:59,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:21:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:21:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 1371 proven. 105 refuted. 0 times theorem prover too weak. 4152 trivial. 0 not checked. [2019-09-08 03:21:59,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:21:59,861 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:21:59,881 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:22:48,019 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-08 03:22:48,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:22:48,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-08 03:22:48,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:22:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 2525 proven. 105 refuted. 0 times theorem prover too weak. 2998 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:22:48,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:22:48,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-08 03:22:48,162 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 03:22:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 03:22:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:22:48,163 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand 18 states. [2019-09-08 03:22:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:22:48,347 INFO L93 Difference]: Finished difference Result 296 states and 333 transitions. [2019-09-08 03:22:48,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 03:22:48,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 165 [2019-09-08 03:22:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:22:48,352 INFO L225 Difference]: With dead ends: 296 [2019-09-08 03:22:48,353 INFO L226 Difference]: Without dead ends: 155 [2019-09-08 03:22:48,353 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:22:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-09-08 03:22:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2019-09-08 03:22:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-08 03:22:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2019-09-08 03:22:48,388 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 165 [2019-09-08 03:22:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:22:48,388 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2019-09-08 03:22:48,388 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 03:22:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2019-09-08 03:22:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-08 03:22:48,390 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:22:48,390 INFO L399 BasicCegarLoop]: trace histogram [105, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:22:48,391 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:22:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:22:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1955584074, now seen corresponding path program 12 times [2019-09-08 03:22:48,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:22:48,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:22:48,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:22:48,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:22:48,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:22:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:22:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 1557 proven. 120 refuted. 0 times theorem prover too weak. 4707 trivial. 0 not checked. [2019-09-08 03:22:48,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:22:48,753 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:22:48,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:26:09,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-09-08 03:26:09,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:26:12,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-08 03:26:12,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:26:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 2866 proven. 120 refuted. 0 times theorem prover too weak. 3398 trivial. 0 not checked. [2019-09-08 03:26:12,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:26:12,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-08 03:26:12,876 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 03:26:12,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 03:26:12,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:26:12,877 INFO L87 Difference]: Start difference. First operand 154 states and 169 transitions. Second operand 19 states. [2019-09-08 03:26:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:26:13,113 INFO L93 Difference]: Finished difference Result 310 states and 347 transitions. [2019-09-08 03:26:13,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 03:26:13,113 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 172 [2019-09-08 03:26:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:26:13,114 INFO L225 Difference]: With dead ends: 310 [2019-09-08 03:26:13,114 INFO L226 Difference]: Without dead ends: 162 [2019-09-08 03:26:13,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:26:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-09-08 03:26:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2019-09-08 03:26:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-08 03:26:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2019-09-08 03:26:13,127 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 172 [2019-09-08 03:26:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:26:13,127 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2019-09-08 03:26:13,127 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 03:26:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2019-09-08 03:26:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-08 03:26:13,129 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:26:13,130 INFO L399 BasicCegarLoop]: trace histogram [112, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:26:13,130 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:26:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:26:13,130 INFO L82 PathProgramCache]: Analyzing trace with hash -688995653, now seen corresponding path program 13 times [2019-09-08 03:26:13,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:26:13,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:26:13,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:26:13,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:26:13,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:26:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:26:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7189 backedges. 1755 proven. 136 refuted. 0 times theorem prover too weak. 5298 trivial. 0 not checked. [2019-09-08 03:26:13,470 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:26:13,470 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:26:13,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:26:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:26:13,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-08 03:26:13,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:26:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7189 backedges. 14 proven. 6239 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2019-09-08 03:26:13,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:26:13,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2019-09-08 03:26:13,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 03:26:13,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 03:26:13,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:26:13,930 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand 35 states. [2019-09-08 03:26:18,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:26:18,666 INFO L93 Difference]: Finished difference Result 365 states and 409 transitions. [2019-09-08 03:26:18,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2019-09-08 03:26:18,667 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 179 [2019-09-08 03:26:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:26:18,669 INFO L225 Difference]: With dead ends: 365 [2019-09-08 03:26:18,669 INFO L226 Difference]: Without dead ends: 210 [2019-09-08 03:26:18,678 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9260 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=867, Invalid=25539, Unknown=0, NotChecked=0, Total=26406 [2019-09-08 03:26:18,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-09-08 03:26:18,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2019-09-08 03:26:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-08 03:26:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 206 transitions. [2019-09-08 03:26:18,696 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 206 transitions. Word has length 179 [2019-09-08 03:26:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:26:18,696 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 206 transitions. [2019-09-08 03:26:18,696 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 03:26:18,697 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 206 transitions. [2019-09-08 03:26:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-08 03:26:18,698 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:26:18,699 INFO L399 BasicCegarLoop]: trace histogram [136, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:26:18,699 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:26:18,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:26:18,699 INFO L82 PathProgramCache]: Analyzing trace with hash 901993268, now seen corresponding path program 14 times [2019-09-08 03:26:18,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:26:18,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:26:18,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:26:18,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:26:18,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:26:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:26:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10516 backedges. 2292 proven. 153 refuted. 0 times theorem prover too weak. 8071 trivial. 0 not checked. [2019-09-08 03:26:19,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:26:19,061 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:26:19,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:26:19,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:26:19,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:26:19,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-08 03:26:19,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:26:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10516 backedges. 16 proven. 9281 refuted. 0 times theorem prover too weak. 1219 trivial. 0 not checked. [2019-09-08 03:26:19,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:26:19,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2019-09-08 03:26:19,604 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-08 03:26:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-08 03:26:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 03:26:19,605 INFO L87 Difference]: Start difference. First operand 189 states and 206 transitions. Second operand 38 states. [2019-09-08 03:26:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:26:26,086 INFO L93 Difference]: Finished difference Result 424 states and 473 transitions. [2019-09-08 03:26:26,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2019-09-08 03:26:26,087 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 211 [2019-09-08 03:26:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:26:26,088 INFO L225 Difference]: With dead ends: 424 [2019-09-08 03:26:26,089 INFO L226 Difference]: Without dead ends: 241 [2019-09-08 03:26:26,093 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13140 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1026, Invalid=35264, Unknown=0, NotChecked=0, Total=36290 [2019-09-08 03:26:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-09-08 03:26:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 219. [2019-09-08 03:26:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-09-08 03:26:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 238 transitions. [2019-09-08 03:26:26,113 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 238 transitions. Word has length 211 [2019-09-08 03:26:26,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:26:26,113 INFO L475 AbstractCegarLoop]: Abstraction has 219 states and 238 transitions. [2019-09-08 03:26:26,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-08 03:26:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 238 transitions. [2019-09-08 03:26:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-09-08 03:26:26,115 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:26:26,115 INFO L399 BasicCegarLoop]: trace histogram [162, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:26:26,115 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:26:26,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:26:26,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1792762531, now seen corresponding path program 15 times [2019-09-08 03:26:26,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:26:26,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:26:26,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:26:26,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:26:26,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:26:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:26:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14814 backedges. 2915 proven. 171 refuted. 0 times theorem prover too weak. 11728 trivial. 0 not checked. [2019-09-08 03:26:26,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:26:26,503 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:26:26,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:31:35,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-08 03:31:35,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:31:50,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-08 03:31:50,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:31:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14814 backedges. 2961 proven. 171 refuted. 0 times theorem prover too weak. 11682 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (19)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:31:50,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:31:50,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-08 03:31:50,453 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 03:31:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 03:31:50,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:31:50,456 INFO L87 Difference]: Start difference. First operand 219 states and 238 transitions. Second operand 22 states. [2019-09-08 03:31:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:50,722 INFO L93 Difference]: Finished difference Result 442 states and 489 transitions. [2019-09-08 03:31:50,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 03:31:50,723 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 245 [2019-09-08 03:31:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:50,724 INFO L225 Difference]: With dead ends: 442 [2019-09-08 03:31:50,724 INFO L226 Difference]: Without dead ends: 229 [2019-09-08 03:31:50,728 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2019-09-08 03:31:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-09-08 03:31:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2019-09-08 03:31:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-09-08 03:31:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 247 transitions. [2019-09-08 03:31:50,750 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 247 transitions. Word has length 245 [2019-09-08 03:31:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:31:50,753 INFO L475 AbstractCegarLoop]: Abstraction has 228 states and 247 transitions. [2019-09-08 03:31:50,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 03:31:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 247 transitions. [2019-09-08 03:31:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-09-08 03:31:50,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:31:50,757 INFO L399 BasicCegarLoop]: trace histogram [171, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:31:50,758 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:31:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:31:50,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1846622154, now seen corresponding path program 16 times [2019-09-08 03:31:50,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:31:50,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:31:50,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:50,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:31:50,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:31:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:31:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16389 backedges. 3227 proven. 190 refuted. 0 times theorem prover too weak. 12972 trivial. 0 not checked. [2019-09-08 03:31:51,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:31:51,418 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:31:51,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:31:51,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:31:51,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:31:51,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-08 03:31:51,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:31:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16389 backedges. 18 proven. 14662 refuted. 0 times theorem prover too weak. 1709 trivial. 0 not checked. [2019-09-08 03:31:52,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:31:52,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2019-09-08 03:31:52,119 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-08 03:31:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-08 03:31:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 03:31:52,120 INFO L87 Difference]: Start difference. First operand 228 states and 247 transitions. Second operand 42 states. [2019-09-08 03:31:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:31:59,988 INFO L93 Difference]: Finished difference Result 507 states and 561 transitions. [2019-09-08 03:31:59,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2019-09-08 03:31:59,989 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 254 [2019-09-08 03:31:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:31:59,991 INFO L225 Difference]: With dead ends: 507 [2019-09-08 03:31:59,991 INFO L226 Difference]: Without dead ends: 285 [2019-09-08 03:31:59,994 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20020 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1260, Invalid=52332, Unknown=0, NotChecked=0, Total=53592 [2019-09-08 03:31:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-09-08 03:32:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 261. [2019-09-08 03:32:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2019-09-08 03:32:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 282 transitions. [2019-09-08 03:32:00,018 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 282 transitions. Word has length 254 [2019-09-08 03:32:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:32:00,019 INFO L475 AbstractCegarLoop]: Abstraction has 261 states and 282 transitions. [2019-09-08 03:32:00,019 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-08 03:32:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 282 transitions. [2019-09-08 03:32:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2019-09-08 03:32:00,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:32:00,021 INFO L399 BasicCegarLoop]: trace histogram [200, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:32:00,021 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:32:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:32:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash -251983810, now seen corresponding path program 17 times [2019-09-08 03:32:00,022 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:32:00,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:32:00,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:32:00,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:32:00,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:32:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:32:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22290 backedges. 3999 proven. 210 refuted. 0 times theorem prover too weak. 18081 trivial. 0 not checked. [2019-09-08 03:32:00,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:32:00,498 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:32:00,511 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1