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/array-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 11:49:02,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 11:49:02,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 11:49:02,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 11:49:02,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 11:49:02,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 11:49:02,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 11:49:02,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 11:49:02,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 11:49:02,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 11:49:02,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 11:49:02,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 11:49:02,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 11:49:02,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 11:49:02,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 11:49:02,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 11:49:02,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 11:49:02,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 11:49:02,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 11:49:02,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 11:49:02,876 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 [2019-09-07 11:49:02,901 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 11:49:02,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 11:49:02,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 11:49:02,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 11:49:02,903 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 11:49:02,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 11:49:02,904 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 11:49:02,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 11:49:02,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 11:49:02,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 11:49:02,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 11:49:02,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 11:49:02,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 11:49:02,905 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 11:49:02,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 11:49:02,906 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 11:49:02,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 11:49:02,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 11:49:02,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 11:49:02,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 11:49:02,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 11:49:02,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 11:49:02,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 11:49:02,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 11:49:02,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 11:49:02,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 11:49:02,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 11:49:02,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 11:49:02,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 11:49:02,936 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 11:49:02,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 11:49:02,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 11:49:02,951 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 11:49:02,951 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 11:49:02,952 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-1.i [2019-09-07 11:49:03,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/212040692/a4cd856e9f184f65be9c2089fa35e4c8/FLAGdf55b2980 [2019-09-07 11:49:03,422 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 11:49:03,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome2-1.i [2019-09-07 11:49:03,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/212040692/a4cd856e9f184f65be9c2089fa35e4c8/FLAGdf55b2980 [2019-09-07 11:49:03,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/212040692/a4cd856e9f184f65be9c2089fa35e4c8 [2019-09-07 11:49:03,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 11:49:03,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 11:49:03,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 11:49:03,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 11:49:03,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 11:49:03,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:49:03" (1/1) ... [2019-09-07 11:49:03,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7cbb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:03, skipping insertion in model container [2019-09-07 11:49:03,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:49:03" (1/1) ... [2019-09-07 11:49:03,861 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 11:49:03,875 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 11:49:04,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:49:04,049 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 11:49:04,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:49:04,105 INFO L192 MainTranslator]: Completed translation [2019-09-07 11:49:04,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04 WrapperNode [2019-09-07 11:49:04,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 11:49:04,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 11:49:04,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 11:49:04,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 11:49:04,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (1/1) ... [2019-09-07 11:49:04,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (1/1) ... [2019-09-07 11:49:04,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (1/1) ... [2019-09-07 11:49:04,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (1/1) ... [2019-09-07 11:49:04,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (1/1) ... [2019-09-07 11:49:04,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (1/1) ... [2019-09-07 11:49:04,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (1/1) ... [2019-09-07 11:49:04,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 11:49:04,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 11:49:04,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 11:49:04,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 11:49:04,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (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 [2019-09-07 11:49:04,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 11:49:04,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 11:49:04,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 11:49:04,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 11:49:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 11:49:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 11:49:04,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 11:49:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 11:49:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 11:49:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 11:49:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 11:49:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 11:49:04,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 11:49:04,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 11:49:04,613 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 11:49:04,613 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-07 11:49:04,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:49:04 BoogieIcfgContainer [2019-09-07 11:49:04,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 11:49:04,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 11:49:04,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 11:49:04,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 11:49:04,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 11:49:03" (1/3) ... [2019-09-07 11:49:04,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d7fe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:49:04, skipping insertion in model container [2019-09-07 11:49:04,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:49:04" (2/3) ... [2019-09-07 11:49:04,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d7fe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:49:04, skipping insertion in model container [2019-09-07 11:49:04,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:49:04" (3/3) ... [2019-09-07 11:49:04,622 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2019-09-07 11:49:04,629 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 11:49:04,636 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 11:49:04,651 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 11:49:04,681 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 11:49:04,681 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 11:49:04,682 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 11:49:04,682 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 11:49:04,682 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 11:49:04,682 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 11:49:04,682 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 11:49:04,682 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 11:49:04,683 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 11:49:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-07 11:49:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 11:49:04,705 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:49:04,705 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:49:04,707 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:49:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:49:04,713 INFO L82 PathProgramCache]: Analyzing trace with hash 696803616, now seen corresponding path program 1 times [2019-09-07 11:49:04,714 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:49:04,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:49:04,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:04,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:49:04,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:49:04,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:49:04,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 11:49:04,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 11:49:04,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 11:49:04,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 11:49:04,858 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-07 11:49:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:49:04,883 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-09-07 11:49:04,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 11:49:04,884 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-07 11:49:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:49:04,893 INFO L225 Difference]: With dead ends: 56 [2019-09-07 11:49:04,893 INFO L226 Difference]: Without dead ends: 27 [2019-09-07 11:49:04,896 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 [2019-09-07 11:49:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-07 11:49:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-07 11:49:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 11:49:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-09-07 11:49:04,940 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2019-09-07 11:49:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:49:04,940 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-09-07 11:49:04,940 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 11:49:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-09-07 11:49:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 11:49:04,942 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:49:04,942 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:49:04,942 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:49:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:49:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash 123133892, now seen corresponding path program 1 times [2019-09-07 11:49:04,943 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:49:04,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:49:04,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:04,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:49:04,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:49:05,012 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:49:05,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:49:05,016 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:49:05,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:49:05,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:49:05,017 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-09-07 11:49:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:49:05,134 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-09-07 11:49:05,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:49:05,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-09-07 11:49:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:49:05,137 INFO L225 Difference]: With dead ends: 54 [2019-09-07 11:49:05,137 INFO L226 Difference]: Without dead ends: 35 [2019-09-07 11:49:05,139 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:49:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-07 11:49:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-09-07 11:49:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 11:49:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-09-07 11:49:05,153 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2019-09-07 11:49:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:49:05,153 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-09-07 11:49:05,154 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:49:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-09-07 11:49:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 11:49:05,158 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:49:05,158 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:49:05,159 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:49:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:49:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash -204061721, now seen corresponding path program 1 times [2019-09-07 11:49:05,160 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:49:05,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:49:05,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:05,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:49:05,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-07 11:49:05,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:49:05,308 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 [2019-09-07 11:49:05,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:49:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:05,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:49:05,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:49:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:49:05,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:49:05,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-07 11:49:05,433 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:49:05,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:49:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:49:05,434 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2019-09-07 11:49:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:49:05,664 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2019-09-07 11:49:05,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:49:05,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-09-07 11:49:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:49:05,668 INFO L225 Difference]: With dead ends: 80 [2019-09-07 11:49:05,668 INFO L226 Difference]: Without dead ends: 59 [2019-09-07 11:49:05,669 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:49:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-07 11:49:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2019-09-07 11:49:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-07 11:49:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-09-07 11:49:05,681 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 25 [2019-09-07 11:49:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:49:05,682 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-09-07 11:49:05,682 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:49:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-09-07 11:49:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-07 11:49:05,684 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:49:05,684 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:49:05,684 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:49:05,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:49:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1317149946, now seen corresponding path program 1 times [2019-09-07 11:49:05,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:49:05,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:49:05,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:05,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:49:05,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-07 11:49:05,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:49:05,835 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) [2019-09-07 11:49:05,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:49:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:05,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:49:05,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:49:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-09-07 11:49:05,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:49:05,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-09-07 11:49:05,965 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 11:49:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 11:49:05,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:49:05,966 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 11 states. [2019-09-07 11:49:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:49:06,296 INFO L93 Difference]: Finished difference Result 142 states and 185 transitions. [2019-09-07 11:49:06,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 11:49:06,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2019-09-07 11:49:06,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:49:06,299 INFO L225 Difference]: With dead ends: 142 [2019-09-07 11:49:06,299 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 11:49:06,300 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:49:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 11:49:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2019-09-07 11:49:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 11:49:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2019-09-07 11:49:06,313 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 49 [2019-09-07 11:49:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:49:06,314 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2019-09-07 11:49:06,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 11:49:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2019-09-07 11:49:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 11:49:06,316 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:49:06,317 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:49:06,317 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:49:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:49:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash -822665612, now seen corresponding path program 2 times [2019-09-07 11:49:06,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:49:06,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:49:06,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:06,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:49:06,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-09-07 11:49:06,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:49:06,503 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-07 11:49:06,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:49:06,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:49:06,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:49:06,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 11:49:06,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:49:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2019-09-07 11:49:06,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:49:06,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2019-09-07 11:49:06,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 11:49:06,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 11:49:06,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:49:06,729 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 16 states. [2019-09-07 11:49:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:49:07,223 INFO L93 Difference]: Finished difference Result 234 states and 306 transitions. [2019-09-07 11:49:07,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 11:49:07,224 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 81 [2019-09-07 11:49:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:49:07,226 INFO L225 Difference]: With dead ends: 234 [2019-09-07 11:49:07,226 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 11:49:07,227 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2019-09-07 11:49:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 11:49:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2019-09-07 11:49:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 11:49:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2019-09-07 11:49:07,244 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 81 [2019-09-07 11:49:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:49:07,245 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2019-09-07 11:49:07,245 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 11:49:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2019-09-07 11:49:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 11:49:07,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:49:07,249 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:49:07,249 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:49:07,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:49:07,250 INFO L82 PathProgramCache]: Analyzing trace with hash 48136593, now seen corresponding path program 3 times [2019-09-07 11:49:07,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:49:07,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:49:07,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:07,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:49:07,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2019-09-07 11:49:07,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:49:07,475 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) [2019-09-07 11:49:07,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:49:07,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 11:49:07,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:49:07,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:49:07,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:49:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Stream closed [2019-09-07 11:49:07,589 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:49:07,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2019-09-07 11:49:07,590 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 11:49:07,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 11:49:07,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:49:07,591 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand 10 states. [2019-09-07 11:49:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:49:07,805 INFO L93 Difference]: Finished difference Result 420 states and 540 transitions. [2019-09-07 11:49:07,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 11:49:07,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 121 [2019-09-07 11:49:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:49:07,808 INFO L225 Difference]: With dead ends: 420 [2019-09-07 11:49:07,808 INFO L226 Difference]: Without dead ends: 330 [2019-09-07 11:49:07,810 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2019-09-07 11:49:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2019-09-07 11:49:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 126. [2019-09-07 11:49:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 11:49:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2019-09-07 11:49:07,830 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 121 [2019-09-07 11:49:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:49:07,831 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2019-09-07 11:49:07,831 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 11:49:07,831 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2019-09-07 11:49:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 11:49:07,838 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:49:07,838 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:49:07,838 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:49:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:49:07,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1446011601, now seen corresponding path program 4 times [2019-09-07 11:49:07,839 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:49:07,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:49:07,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:07,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:49:07,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2019-09-07 11:49:08,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:49:08,044 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 [2019-09-07 11:49:08,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:49:08,107 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:49:08,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:49:08,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:49:08,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:49:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2019-09-07 11:49:08,159 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:49:08,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2019-09-07 11:49:08,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 11:49:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 11:49:08,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:49:08,161 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand 11 states. [2019-09-07 11:49:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:49:08,562 INFO L93 Difference]: Finished difference Result 500 states and 645 transitions. [2019-09-07 11:49:08,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 11:49:08,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 121 [2019-09-07 11:49:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:49:08,566 INFO L225 Difference]: With dead ends: 500 [2019-09-07 11:49:08,566 INFO L226 Difference]: Without dead ends: 416 [2019-09-07 11:49:08,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-09-07 11:49:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2019-09-07 11:49:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 196. [2019-09-07 11:49:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-07 11:49:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 225 transitions. [2019-09-07 11:49:08,612 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 225 transitions. Word has length 121 [2019-09-07 11:49:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:49:08,613 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 225 transitions. [2019-09-07 11:49:08,613 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 11:49:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 225 transitions. [2019-09-07 11:49:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 11:49:08,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:49:08,618 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:49:08,618 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:49:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:49:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1600423597, now seen corresponding path program 5 times [2019-09-07 11:49:08,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:49:08,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:49:08,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:08,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:49:08,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:49:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:49:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-09-07 11:49:08,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:49:08,868 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 [2019-09-07 11:49:08,885 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:50:53,887 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 11:50:53,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:50:53,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:50:53,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:50:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2019-09-07 11:50:54,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:50:54,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2019-09-07 11:50:54,032 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 11:50:54,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 11:50:54,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:50:54,033 INFO L87 Difference]: Start difference. First operand 196 states and 225 transitions. Second operand 19 states. [2019-09-07 11:50:54,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:50:54,543 INFO L93 Difference]: Finished difference Result 620 states and 703 transitions. [2019-09-07 11:50:54,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 11:50:54,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 121 [2019-09-07 11:50:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:50:54,546 INFO L225 Difference]: With dead ends: 620 [2019-09-07 11:50:54,546 INFO L226 Difference]: Without dead ends: 457 [2019-09-07 11:50:54,549 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=744, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 11:50:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2019-09-07 11:50:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 218. [2019-09-07 11:50:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-09-07 11:50:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 249 transitions. [2019-09-07 11:50:54,577 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 249 transitions. Word has length 121 [2019-09-07 11:50:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:50:54,578 INFO L475 AbstractCegarLoop]: Abstraction has 218 states and 249 transitions. [2019-09-07 11:50:54,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 11:50:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 249 transitions. [2019-09-07 11:50:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 11:50:54,584 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:50:54,585 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:50:54,585 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:50:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:50:54,585 INFO L82 PathProgramCache]: Analyzing trace with hash -482377109, now seen corresponding path program 6 times [2019-09-07 11:50:54,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:50:54,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:50:54,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:50:54,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:50:54,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:50:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:50:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2019-09-07 11:50:54,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:50:54,898 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 [2019-09-07 11:50:54,923 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:52:23,800 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-07 11:52:23,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:52:23,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 11:52:23,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:52:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2019-09-07 11:52:24,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:52:24,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-09-07 11:52:24,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 11:52:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 11:52:24,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 11:52:24,046 INFO L87 Difference]: Start difference. First operand 218 states and 249 transitions. Second operand 33 states. [2019-09-07 11:52:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:52:25,172 INFO L93 Difference]: Finished difference Result 1598 states and 1766 transitions. [2019-09-07 11:52:25,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 11:52:25,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 137 [2019-09-07 11:52:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:52:25,182 INFO L225 Difference]: With dead ends: 1598 [2019-09-07 11:52:25,182 INFO L226 Difference]: Without dead ends: 1417 [2019-09-07 11:52:25,186 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 11:52:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2019-09-07 11:52:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 428. [2019-09-07 11:52:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2019-09-07 11:52:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 489 transitions. [2019-09-07 11:52:25,239 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 489 transitions. Word has length 137 [2019-09-07 11:52:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:52:25,241 INFO L475 AbstractCegarLoop]: Abstraction has 428 states and 489 transitions. [2019-09-07 11:52:25,241 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 11:52:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 489 transitions. [2019-09-07 11:52:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-09-07 11:52:25,244 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:52:25,245 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:52:25,245 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:52:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:52:25,245 INFO L82 PathProgramCache]: Analyzing trace with hash 275962022, now seen corresponding path program 7 times [2019-09-07 11:52:25,246 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:52:25,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:52:25,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:52:25,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:52:25,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:52:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:52:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1328 refuted. 0 times theorem prover too weak. 2242 trivial. 0 not checked. [2019-09-07 11:52:26,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:52:26,210 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 [2019-09-07 11:52:26,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:52:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:52:26,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 11:52:26,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:52:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2670 trivial. 0 not checked. [2019-09-07 11:52:26,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:52:26,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2019-09-07 11:52:26,951 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-07 11:52:26,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-07 11:52:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 11:52:26,955 INFO L87 Difference]: Start difference. First operand 428 states and 489 transitions. Second operand 63 states. [2019-09-07 11:52:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:52:30,215 INFO L93 Difference]: Finished difference Result 2358 states and 2691 transitions. [2019-09-07 11:52:30,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 11:52:30,215 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 257 [2019-09-07 11:52:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:52:30,223 INFO L225 Difference]: With dead ends: 2358 [2019-09-07 11:52:30,224 INFO L226 Difference]: Without dead ends: 1997 [2019-09-07 11:52:30,229 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4374 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2019-09-07 11:52:30,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2019-09-07 11:52:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 848. [2019-09-07 11:52:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-09-07 11:52:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 969 transitions. [2019-09-07 11:52:30,337 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 969 transitions. Word has length 257 [2019-09-07 11:52:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:52:30,337 INFO L475 AbstractCegarLoop]: Abstraction has 848 states and 969 transitions. [2019-09-07 11:52:30,337 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-07 11:52:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 969 transitions. [2019-09-07 11:52:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2019-09-07 11:52:30,352 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:52:30,353 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:52:30,353 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:52:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:52:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1270204234, now seen corresponding path program 8 times [2019-09-07 11:52:30,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:52:30,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:52:30,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:52:30,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:52:30,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:52:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:52:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14340 backedges. 0 proven. 5363 refuted. 0 times theorem prover too weak. 8977 trivial. 0 not checked. [2019-09-07 11:52:32,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:52:32,269 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:52:32,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:52:32,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:52:32,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:52:32,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 62 conjunts are in the unsatisfiable core [2019-09-07 11:52:32,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:52:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14340 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10740 trivial. 0 not checked. [2019-09-07 11:52:34,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:52:34,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 63] total 123 [2019-09-07 11:52:34,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-09-07 11:52:34,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-09-07 11:52:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2019-09-07 11:52:34,101 INFO L87 Difference]: Start difference. First operand 848 states and 969 transitions. Second operand 123 states. [2019-09-07 11:52:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:52:44,401 INFO L93 Difference]: Finished difference Result 7398 states and 8061 transitions. [2019-09-07 11:52:44,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2019-09-07 11:52:44,402 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 497 [2019-09-07 11:52:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:52:44,427 INFO L225 Difference]: With dead ends: 7398 [2019-09-07 11:52:44,427 INFO L226 Difference]: Without dead ends: 6677 [2019-09-07 11:52:44,437 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17754 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2019-09-07 11:52:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6677 states. [2019-09-07 11:52:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6677 to 1688. [2019-09-07 11:52:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1688 states. [2019-09-07 11:52:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 1929 transitions. [2019-09-07 11:52:44,664 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 1929 transitions. Word has length 497 [2019-09-07 11:52:44,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:52:44,666 INFO L475 AbstractCegarLoop]: Abstraction has 1688 states and 1929 transitions. [2019-09-07 11:52:44,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 123 states. [2019-09-07 11:52:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 1929 transitions. [2019-09-07 11:52:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2019-09-07 11:52:44,702 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:52:44,703 INFO L399 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 120, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:52:44,703 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:52:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:52:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2028173678, now seen corresponding path program 9 times [2019-09-07 11:52:44,704 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:52:44,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:52:44,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:52:44,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:52:44,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:52:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:52:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 57480 backedges. 0 proven. 21533 refuted. 0 times theorem prover too weak. 35947 trivial. 0 not checked. [2019-09-07 11:52:51,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:52:51,530 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) [2019-09-07 11:52:51,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:53:02,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 11:53:02,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:53:02,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:53:03,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:53:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 57480 backedges. 941 proven. 7 refuted. 0 times theorem prover too weak. 56532 trivial. 0 not checked. [2019-09-07 11:53:04,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:53:04,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 6] total 126 [2019-09-07 11:53:04,131 INFO L454 AbstractCegarLoop]: Interpolant automaton has 126 states [2019-09-07 11:53:04,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2019-09-07 11:53:04,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7633, Invalid=8117, Unknown=0, NotChecked=0, Total=15750 [2019-09-07 11:53:04,135 INFO L87 Difference]: Start difference. First operand 1688 states and 1929 transitions. Second operand 126 states. [2019-09-07 11:53:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:53:23,629 INFO L93 Difference]: Finished difference Result 33494 states and 34107 transitions. [2019-09-07 11:53:23,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2019-09-07 11:53:23,629 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 977 [2019-09-07 11:53:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:53:23,716 INFO L225 Difference]: With dead ends: 33494 [2019-09-07 11:53:23,716 INFO L226 Difference]: Without dead ends: 32053 [2019-09-07 11:53:23,727 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8686 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=23131, Invalid=38621, Unknown=0, NotChecked=0, Total=61752 [2019-09-07 11:53:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32053 states. [2019-09-07 11:53:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32053 to 1710. [2019-09-07 11:53:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1710 states. [2019-09-07 11:53:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 1953 transitions. [2019-09-07 11:53:24,565 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 1953 transitions. Word has length 977 [2019-09-07 11:53:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:53:24,566 INFO L475 AbstractCegarLoop]: Abstraction has 1710 states and 1953 transitions. [2019-09-07 11:53:24,566 INFO L476 AbstractCegarLoop]: Interpolant automaton has 126 states. [2019-09-07 11:53:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 1953 transitions. [2019-09-07 11:53:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2019-09-07 11:53:24,577 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:53:24,578 INFO L399 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 122, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:53:24,578 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:53:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:53:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash 439695346, now seen corresponding path program 10 times [2019-09-07 11:53:24,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:53:24,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:53:24,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:53:24,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:53:24,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:53:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:53:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 59414 backedges. 0 proven. 22250 refuted. 0 times theorem prover too weak. 37164 trivial. 0 not checked. [2019-09-07 11:53:31,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:53:31,397 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 [2019-09-07 11:53:31,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:53:31,700 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:53:31,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:53:31,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 11:53:31,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:53:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 59414 backedges. 1305 proven. 1335 refuted. 0 times theorem prover too weak. 56774 trivial. 0 not checked. [2019-09-07 11:53:32,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:53:32,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 11] total 132 [2019-09-07 11:53:32,301 INFO L454 AbstractCegarLoop]: Interpolant automaton has 132 states [2019-09-07 11:53:32,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2019-09-07 11:53:32,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8374, Invalid=8918, Unknown=0, NotChecked=0, Total=17292 [2019-09-07 11:53:32,306 INFO L87 Difference]: Start difference. First operand 1710 states and 1953 transitions. Second operand 132 states. [2019-09-07 11:53:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:53:58,029 INFO L93 Difference]: Finished difference Result 3945 states and 4452 transitions. [2019-09-07 11:53:58,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2019-09-07 11:53:58,030 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 993 [2019-09-07 11:53:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:53:58,037 INFO L225 Difference]: With dead ends: 3945 [2019-09-07 11:53:58,038 INFO L226 Difference]: Without dead ends: 2486 [2019-09-07 11:53:58,045 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1483 GetRequests, 1109 SyntacticMatches, 0 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33487 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=47214, Invalid=93786, Unknown=0, NotChecked=0, Total=141000 [2019-09-07 11:53:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2019-09-07 11:53:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2109. [2019-09-07 11:53:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2109 states. [2019-09-07 11:53:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 2357 transitions. [2019-09-07 11:53:58,823 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 2357 transitions. Word has length 993 [2019-09-07 11:53:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:53:58,824 INFO L475 AbstractCegarLoop]: Abstraction has 2109 states and 2357 transitions. [2019-09-07 11:53:58,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 132 states. [2019-09-07 11:53:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 2357 transitions. [2019-09-07 11:53:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1010 [2019-09-07 11:53:58,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:53:58,837 INFO L399 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 124, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:53:58,837 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:53:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:53:58,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1357065456, now seen corresponding path program 1 times [2019-09-07 11:53:58,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:53:58,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:53:58,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:53:58,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:53:58,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:53:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:54:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 61380 backedges. 0 proven. 22987 refuted. 0 times theorem prover too weak. 38393 trivial. 0 not checked. [2019-09-07 11:54:05,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:54:05,342 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 [2019-09-07 11:54:05,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:54:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:54:05,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 2555 conjuncts, 126 conjunts are in the unsatisfiable core [2019-09-07 11:54:05,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:54:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 61380 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 46004 trivial. 0 not checked. [2019-09-07 11:54:11,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:54:11,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 127] total 250 [2019-09-07 11:54:11,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 250 states [2019-09-07 11:54:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2019-09-07 11:54:11,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30878, Invalid=31372, Unknown=0, NotChecked=0, Total=62250 [2019-09-07 11:54:11,652 INFO L87 Difference]: Start difference. First operand 2109 states and 2357 transitions. Second operand 250 states. [2019-09-07 11:56:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:19,583 INFO L93 Difference]: Finished difference Result 92217 states and 93698 transitions. [2019-09-07 11:56:19,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2019-09-07 11:56:19,583 INFO L78 Accepts]: Start accepts. Automaton has 250 states. Word has length 1009 [2019-09-07 11:56:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:19,724 INFO L225 Difference]: With dead ends: 92217 [2019-09-07 11:56:19,724 INFO L226 Difference]: Without dead ends: 90363 [2019-09-07 11:56:19,748 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1380 GetRequests, 885 SyntacticMatches, 0 SemanticMatches, 495 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75756 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=92628, Invalid=153884, Unknown=0, NotChecked=0, Total=246512 [2019-09-07 11:56:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90363 states. [2019-09-07 11:56:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90363 to 4200. [2019-09-07 11:56:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2019-09-07 11:56:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 4694 transitions. [2019-09-07 11:56:26,842 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 4694 transitions. Word has length 1009 [2019-09-07 11:56:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:26,843 INFO L475 AbstractCegarLoop]: Abstraction has 4200 states and 4694 transitions. [2019-09-07 11:56:26,843 INFO L476 AbstractCegarLoop]: Interpolant automaton has 250 states. [2019-09-07 11:56:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 4694 transitions. [2019-09-07 11:56:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1994 [2019-09-07 11:56:26,879 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:26,880 INFO L399 BasicCegarLoop]: trace histogram [247, 247, 247, 247, 247, 247, 246, 246, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:26,880 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1732500893, now seen corresponding path program 2 times [2019-09-07 11:56:26,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:26,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:26,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:26,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:26,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 243789 backedges. 0 proven. 91375 refuted. 0 times theorem prover too weak. 152414 trivial. 0 not checked. [2019-09-07 11:56:51,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:51,715 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 [2019-09-07 11:56:51,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:56:52,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:56:52,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:52,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 5015 conjuncts, 249 conjunts are in the unsatisfiable core [2019-09-07 11:56:52,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:57:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 243789 backedges. 0 proven. 61009 refuted. 0 times theorem prover too weak. 182780 trivial. 0 not checked. [2019-09-07 11:57:15,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:57:15,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [248, 250] total 496 [2019-09-07 11:57:15,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 496 states [2019-09-07 11:57:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 496 interpolants. [2019-09-07 11:57:15,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122267, Invalid=123253, Unknown=0, NotChecked=0, Total=245520 [2019-09-07 11:57:15,351 INFO L87 Difference]: Start difference. First operand 4200 states and 4694 transitions. Second operand 496 states.