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-examples/standard_copy4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:34:14,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:34:14,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:34:14,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 09:34:14,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:34:14,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:34:14,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:34:14,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:34:14,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:34:14,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:34:14,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:34:14,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:34:14,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:34:14,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:34:14,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:34:14,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:34:14,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:34:14,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:34:14,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:34:14,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:34:14,874 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 09:34:14,888 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:34:14,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:34:14,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:34:14,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:34:14,889 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:34:14,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:34:14,890 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:34:14,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:34:14,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:34:14,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:34:14,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:34:14,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:34:14,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:34:14,891 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:34:14,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:34:14,891 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:34:14,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:34:14,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:34:14,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:34:14,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:34:14,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:34:14,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:34:14,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:34:14,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:34:14,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:34:14,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:34:14,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:34:14,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:34:14,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:34:14,927 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:34:14,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:34:14,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:34:14,952 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:34:14,952 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:34:14,953 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2019-09-07 09:34:15,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2178b031/7a31aec27de040cbae28011c309113c0/FLAG323b672ef [2019-09-07 09:34:15,509 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:34:15,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2019-09-07 09:34:15,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2178b031/7a31aec27de040cbae28011c309113c0/FLAG323b672ef [2019-09-07 09:34:15,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2178b031/7a31aec27de040cbae28011c309113c0 [2019-09-07 09:34:15,905 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:34:15,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:34:15,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:34:15,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:34:15,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:34:15,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:34:15" (1/1) ... [2019-09-07 09:34:15,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481cb625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:15, skipping insertion in model container [2019-09-07 09:34:15,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:34:15" (1/1) ... [2019-09-07 09:34:15,924 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:34:15,942 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:34:16,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:34:16,154 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:34:16,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:34:16,197 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:34:16,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16 WrapperNode [2019-09-07 09:34:16,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:34:16,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:34:16,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:34:16,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:34:16,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (1/1) ... [2019-09-07 09:34:16,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (1/1) ... [2019-09-07 09:34:16,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (1/1) ... [2019-09-07 09:34:16,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (1/1) ... [2019-09-07 09:34:16,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (1/1) ... [2019-09-07 09:34:16,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (1/1) ... [2019-09-07 09:34:16,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (1/1) ... [2019-09-07 09:34:16,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:34:16,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:34:16,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:34:16,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:34:16,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (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 09:34:16,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:34:16,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:34:16,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:34:16,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:34:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:34:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:34:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:34:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:34:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:34:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:34:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:34:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:34:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:34:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:34:16,685 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:34:16,686 INFO L283 CfgBuilder]: Removed 6 assume(true) statements. [2019-09-07 09:34:16,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:34:16 BoogieIcfgContainer [2019-09-07 09:34:16,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:34:16,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:34:16,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:34:16,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:34:16,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:34:15" (1/3) ... [2019-09-07 09:34:16,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c32cf48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:34:16, skipping insertion in model container [2019-09-07 09:34:16,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:34:16" (2/3) ... [2019-09-07 09:34:16,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c32cf48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:34:16, skipping insertion in model container [2019-09-07 09:34:16,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:34:16" (3/3) ... [2019-09-07 09:34:16,696 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2019-09-07 09:34:16,708 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:34:16,720 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:34:16,752 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:34:16,826 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:34:16,827 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:34:16,827 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:34:16,827 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:34:16,827 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:34:16,827 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:34:16,828 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:34:16,828 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:34:16,828 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:34:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-09-07 09:34:16,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 09:34:16,854 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:16,855 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] [2019-09-07 09:34:16,857 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1010407240, now seen corresponding path program 1 times [2019-09-07 09:34:16,863 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:16,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:16,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:16,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:16,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:17,011 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 09:34:17,014 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:34:17,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:34:17,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:34:17,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:34:17,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:34:17,036 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-09-07 09:34:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:17,064 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2019-09-07 09:34:17,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:34:17,066 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2019-09-07 09:34:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:17,075 INFO L225 Difference]: With dead ends: 64 [2019-09-07 09:34:17,075 INFO L226 Difference]: Without dead ends: 31 [2019-09-07 09:34:17,079 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 09:34:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-07 09:34:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-07 09:34:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 09:34:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-09-07 09:34:17,124 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-09-07 09:34:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:17,125 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-09-07 09:34:17,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:34:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-09-07 09:34:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-07 09:34:17,127 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:17,127 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] [2019-09-07 09:34:17,127 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash 555030978, now seen corresponding path program 1 times [2019-09-07 09:34:17,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:17,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:17,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:17,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:17,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:17,198 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 09:34:17,198 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:34:17,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:34:17,200 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:34:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:34:17,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:34:17,201 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 3 states. [2019-09-07 09:34:17,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:17,252 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-09-07 09:34:17,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:34:17,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-09-07 09:34:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:17,255 INFO L225 Difference]: With dead ends: 56 [2019-09-07 09:34:17,257 INFO L226 Difference]: Without dead ends: 33 [2019-09-07 09:34:17,259 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 09:34:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-07 09:34:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-07 09:34:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 09:34:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-09-07 09:34:17,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2019-09-07 09:34:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:17,276 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-09-07 09:34:17,276 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:34:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-09-07 09:34:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-07 09:34:17,279 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:17,279 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] [2019-09-07 09:34:17,280 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1099948320, now seen corresponding path program 1 times [2019-09-07 09:34:17,281 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:17,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:17,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:17,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:17,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:34:17,390 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:34:17,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:34:17,391 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:34:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:34:17,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:34:17,394 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 3 states. [2019-09-07 09:34:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:17,479 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2019-09-07 09:34:17,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:34:17,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-09-07 09:34:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:17,485 INFO L225 Difference]: With dead ends: 60 [2019-09-07 09:34:17,485 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 09:34:17,486 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 09:34:17,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 09:34:17,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-09-07 09:34:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-07 09:34:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-09-07 09:34:17,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 23 [2019-09-07 09:34:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:17,502 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-09-07 09:34:17,502 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:34:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-09-07 09:34:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 09:34:17,504 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:17,505 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, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:17,505 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:17,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1986876888, now seen corresponding path program 1 times [2019-09-07 09:34:17,506 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:17,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:17,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:17,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:17,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 09:34:17,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:17,583 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) [2019-09-07 09:34:17,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:17,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:34:17,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:17,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 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 09:34:17,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:17,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:34:17,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:34:17,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:34:17,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:34:17,718 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2019-09-07 09:34:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:17,749 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2019-09-07 09:34:17,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:34:17,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-09-07 09:34:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:17,751 INFO L225 Difference]: With dead ends: 66 [2019-09-07 09:34:17,751 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 09:34:17,752 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:34:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 09:34:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-09-07 09:34:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-07 09:34:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-09-07 09:34:17,762 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2019-09-07 09:34:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:17,763 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-09-07 09:34:17,763 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:34:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-09-07 09:34:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-07 09:34:17,765 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:17,765 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:17,766 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1213402486, now seen corresponding path program 2 times [2019-09-07 09:34:17,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:17,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:17,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:17,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:17,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-07 09:34:17,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:17,868 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:34:17,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:17,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:34:17,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:17,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:34:17,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-07 09:34:17,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:17,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:34:17,966 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:34:17,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:34:17,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:34:17,967 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2019-09-07 09:34:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:18,080 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2019-09-07 09:34:18,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:34:18,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2019-09-07 09:34:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:18,082 INFO L225 Difference]: With dead ends: 73 [2019-09-07 09:34:18,082 INFO L226 Difference]: Without dead ends: 50 [2019-09-07 09:34:18,083 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:34:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-07 09:34:18,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-09-07 09:34:18,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-07 09:34:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-09-07 09:34:18,090 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 33 [2019-09-07 09:34:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:18,091 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-09-07 09:34:18,091 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:34:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-09-07 09:34:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-07 09:34:18,092 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:18,092 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:18,093 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:18,093 INFO L82 PathProgramCache]: Analyzing trace with hash -496193938, now seen corresponding path program 3 times [2019-09-07 09:34:18,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:18,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:18,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:18,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:18,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:34:18,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:18,159 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 09:34:18,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:34:18,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:34:18,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:18,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:34:18,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:34:18,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:18,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 09:34:18,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:34:18,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:34:18,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:34:18,259 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2019-09-07 09:34:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:18,409 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2019-09-07 09:34:18,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:34:18,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-09-07 09:34:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:18,411 INFO L225 Difference]: With dead ends: 96 [2019-09-07 09:34:18,411 INFO L226 Difference]: Without dead ends: 61 [2019-09-07 09:34:18,412 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:34:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-07 09:34:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2019-09-07 09:34:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 09:34:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-09-07 09:34:18,420 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 41 [2019-09-07 09:34:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:18,420 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-09-07 09:34:18,420 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:34:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-09-07 09:34:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 09:34:18,422 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:18,422 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:18,423 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:18,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1761508476, now seen corresponding path program 4 times [2019-09-07 09:34:18,423 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:18,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:18,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:18,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:18,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 09:34:18,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:18,505 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 09:34:18,519 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:18,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:34:18,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:18,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:34:18,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 09:34:18,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:18,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:34:18,584 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:34:18,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:34:18,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:34:18,585 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 7 states. [2019-09-07 09:34:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:18,618 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2019-09-07 09:34:18,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:34:18,618 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-09-07 09:34:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:18,620 INFO L225 Difference]: With dead ends: 102 [2019-09-07 09:34:18,620 INFO L226 Difference]: Without dead ends: 59 [2019-09-07 09:34:18,621 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:34:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-07 09:34:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-09-07 09:34:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 09:34:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-09-07 09:34:18,628 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 51 [2019-09-07 09:34:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:18,628 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-09-07 09:34:18,628 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:34:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-09-07 09:34:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-07 09:34:18,630 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:18,630 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:18,631 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:18,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1571995614, now seen corresponding path program 5 times [2019-09-07 09:34:18,631 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:18,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:18,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:18,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:18,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-09-07 09:34:18,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:18,734 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 09:34:18,748 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:34:19,577 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:34:19,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:19,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:34:19,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-09-07 09:34:19,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:19,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:34:19,616 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:34:19,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:34:19,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:34:19,617 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 7 states. [2019-09-07 09:34:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:19,728 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2019-09-07 09:34:19,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:34:19,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2019-09-07 09:34:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:19,731 INFO L225 Difference]: With dead ends: 105 [2019-09-07 09:34:19,731 INFO L226 Difference]: Without dead ends: 70 [2019-09-07 09:34:19,732 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:34:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-07 09:34:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-09-07 09:34:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 09:34:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2019-09-07 09:34:19,746 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 53 [2019-09-07 09:34:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:19,746 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2019-09-07 09:34:19,747 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:34:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2019-09-07 09:34:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 09:34:19,748 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:19,749 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:19,749 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash 94516506, now seen corresponding path program 6 times [2019-09-07 09:34:19,750 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:19,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:19,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:19,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:19,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-07 09:34:19,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:19,890 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) [2019-09-07 09:34:19,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:20,060 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-07 09:34:20,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:20,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:34:20,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-07 09:34:20,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:20,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:34:20,131 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:34:20,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:34:20,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:34:20,132 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 12 states. [2019-09-07 09:34:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:20,291 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2019-09-07 09:34:20,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:34:20,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2019-09-07 09:34:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:20,293 INFO L225 Difference]: With dead ends: 132 [2019-09-07 09:34:20,293 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 09:34:20,294 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:34:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 09:34:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2019-09-07 09:34:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 09:34:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2019-09-07 09:34:20,301 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 61 [2019-09-07 09:34:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:20,302 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2019-09-07 09:34:20,302 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:34:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2019-09-07 09:34:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 09:34:20,303 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:20,304 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:20,304 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1790106832, now seen corresponding path program 7 times [2019-09-07 09:34:20,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:20,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:20,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:20,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:20,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 09:34:20,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:20,382 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 09:34:20,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:20,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:34:20,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 09:34:20,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:20,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:34:20,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:34:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:34:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:34:20,485 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 9 states. [2019-09-07 09:34:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:20,526 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2019-09-07 09:34:20,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:34:20,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2019-09-07 09:34:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:20,527 INFO L225 Difference]: With dead ends: 138 [2019-09-07 09:34:20,527 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 09:34:20,528 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:34:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 09:34:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-09-07 09:34:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-07 09:34:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2019-09-07 09:34:20,536 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 71 [2019-09-07 09:34:20,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:20,536 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2019-09-07 09:34:20,536 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:34:20,536 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2019-09-07 09:34:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-07 09:34:20,538 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:20,538 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:20,538 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:20,539 INFO L82 PathProgramCache]: Analyzing trace with hash 667575502, now seen corresponding path program 8 times [2019-09-07 09:34:20,539 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:20,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:20,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:20,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-09-07 09:34:20,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:20,659 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) [2019-09-07 09:34:20,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:20,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:34:20,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:20,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:34:20,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 09:34:20,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:20,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 09:34:20,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:34:20,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:34:20,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:34:20,932 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2019-09-07 09:34:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:21,134 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2019-09-07 09:34:21,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:34:21,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2019-09-07 09:34:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:21,137 INFO L225 Difference]: With dead ends: 152 [2019-09-07 09:34:21,137 INFO L226 Difference]: Without dead ends: 93 [2019-09-07 09:34:21,138 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:34:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-07 09:34:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2019-09-07 09:34:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 09:34:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2019-09-07 09:34:21,152 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 73 [2019-09-07 09:34:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:21,153 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2019-09-07 09:34:21,153 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:34:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2019-09-07 09:34:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 09:34:21,154 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:21,156 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:21,156 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash 693043684, now seen corresponding path program 9 times [2019-09-07 09:34:21,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:21,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:21,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:21,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:21,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-09-07 09:34:21,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:21,263 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 09:34:21,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:34:23,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 09:34:23,212 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:23,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:34:23,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:34:23,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:23,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2019-09-07 09:34:23,285 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:34:23,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:34:23,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:34:23,286 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 12 states. [2019-09-07 09:34:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:23,462 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2019-09-07 09:34:23,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:34:23,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2019-09-07 09:34:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:23,464 INFO L225 Difference]: With dead ends: 157 [2019-09-07 09:34:23,464 INFO L226 Difference]: Without dead ends: 104 [2019-09-07 09:34:23,466 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:34:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-07 09:34:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-07 09:34:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 09:34:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2019-09-07 09:34:23,485 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 83 [2019-09-07 09:34:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:23,485 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2019-09-07 09:34:23,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:34:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2019-09-07 09:34:23,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-07 09:34:23,487 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:23,487 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:23,487 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:23,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1948405716, now seen corresponding path program 10 times [2019-09-07 09:34:23,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:23,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:23,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:23,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:23,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 09:34:23,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:23,606 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 09:34:23,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:23,671 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:34:23,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:23,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:34:23,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:34:23,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:23,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:34:23,719 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:34:23,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:34:23,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:34:23,719 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand 11 states. [2019-09-07 09:34:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:23,761 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2019-09-07 09:34:23,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:34:23,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2019-09-07 09:34:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:23,763 INFO L225 Difference]: With dead ends: 190 [2019-09-07 09:34:23,764 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 09:34:23,764 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:34:23,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 09:34:23,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-09-07 09:34:23,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 09:34:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2019-09-07 09:34:23,771 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 99 [2019-09-07 09:34:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:23,772 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2019-09-07 09:34:23,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:34:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2019-09-07 09:34:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 09:34:23,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:23,773 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:23,773 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:23,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1634932850, now seen corresponding path program 11 times [2019-09-07 09:34:23,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:23,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:23,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:23,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:23,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 09:34:23,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:23,885 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) [2019-09-07 09:34:23,898 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:07,994 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-07 09:35:07,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:35:08,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:35:08,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 09:35:08,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:08,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 09:35:08,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:35:08,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:35:08,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:35:08,092 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 12 states. [2019-09-07 09:35:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:08,137 INFO L93 Difference]: Finished difference Result 192 states and 202 transitions. [2019-09-07 09:35:08,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:35:08,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2019-09-07 09:35:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:08,138 INFO L225 Difference]: With dead ends: 192 [2019-09-07 09:35:08,138 INFO L226 Difference]: Without dead ends: 109 [2019-09-07 09:35:08,139 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:35:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-07 09:35:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2019-09-07 09:35:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-07 09:35:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2019-09-07 09:35:08,145 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 101 [2019-09-07 09:35:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:08,145 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2019-09-07 09:35:08,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:35:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2019-09-07 09:35:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-07 09:35:08,147 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:08,147 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:08,147 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1035219344, now seen corresponding path program 12 times [2019-09-07 09:35:08,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:08,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:08,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:08,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:35:08,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-09-07 09:35:08,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:08,278 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) [2019-09-07 09:35:08,295 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:13,404 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 09:35:13,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:35:13,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:35:13,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:35:13,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:13,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-09-07 09:35:13,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:35:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:35:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:35:13,568 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 21 states. [2019-09-07 09:35:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:13,804 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2019-09-07 09:35:13,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:35:13,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2019-09-07 09:35:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:13,806 INFO L225 Difference]: With dead ends: 206 [2019-09-07 09:35:13,806 INFO L226 Difference]: Without dead ends: 123 [2019-09-07 09:35:13,807 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:35:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-07 09:35:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2019-09-07 09:35:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-07 09:35:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2019-09-07 09:35:13,813 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 103 [2019-09-07 09:35:13,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:13,813 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2019-09-07 09:35:13,813 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:35:13,814 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2019-09-07 09:35:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-07 09:35:13,815 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:13,815 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:13,815 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:13,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:13,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1827044314, now seen corresponding path program 13 times [2019-09-07 09:35:13,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:13,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:13,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:13,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:35:13,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-09-07 09:35:13,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:13,931 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 09:35:13,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:35:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:13,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:35:13,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-09-07 09:35:14,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:14,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-09-07 09:35:14,155 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:35:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:35:14,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:35:14,158 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand 23 states. [2019-09-07 09:35:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:14,403 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2019-09-07 09:35:14,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:35:14,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 113 [2019-09-07 09:35:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:14,405 INFO L225 Difference]: With dead ends: 224 [2019-09-07 09:35:14,405 INFO L226 Difference]: Without dead ends: 133 [2019-09-07 09:35:14,406 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:35:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-07 09:35:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2019-09-07 09:35:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 09:35:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2019-09-07 09:35:14,412 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 113 [2019-09-07 09:35:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:14,412 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2019-09-07 09:35:14,412 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:35:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2019-09-07 09:35:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 09:35:14,414 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:14,414 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:14,414 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:14,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1159998660, now seen corresponding path program 14 times [2019-09-07 09:35:14,415 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:14,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:14,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:14,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:35:14,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 421 trivial. 0 not checked. [2019-09-07 09:35:14,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:14,570 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:14,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:35:14,645 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:35:14,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:35:14,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:35:14,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-09-07 09:35:14,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:14,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 09:35:14,831 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:35:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:35:14,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:35:14,832 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 25 states. [2019-09-07 09:35:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:15,112 INFO L93 Difference]: Finished difference Result 242 states and 256 transitions. [2019-09-07 09:35:15,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:35:15,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2019-09-07 09:35:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:15,113 INFO L225 Difference]: With dead ends: 242 [2019-09-07 09:35:15,114 INFO L226 Difference]: Without dead ends: 143 [2019-09-07 09:35:15,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:35:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-07 09:35:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2019-09-07 09:35:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-07 09:35:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2019-09-07 09:35:15,120 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 123 [2019-09-07 09:35:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:15,121 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2019-09-07 09:35:15,121 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:35:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2019-09-07 09:35:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-07 09:35:15,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:15,123 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:15,123 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash 353468114, now seen corresponding path program 15 times [2019-09-07 09:35:15,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:15,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:15,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:15,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:35:15,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-09-07 09:35:15,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:15,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:35:15,311 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:50,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:35:50,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:35:50,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:35:50,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 21 proven. 121 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2019-09-07 09:35:50,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:50,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 17 [2019-09-07 09:35:50,306 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:35:50,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:35:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:35:50,306 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 17 states. [2019-09-07 09:35:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:50,525 INFO L93 Difference]: Finished difference Result 237 states and 253 transitions. [2019-09-07 09:35:50,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 09:35:50,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 133 [2019-09-07 09:35:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:50,527 INFO L225 Difference]: With dead ends: 237 [2019-09-07 09:35:50,527 INFO L226 Difference]: Without dead ends: 154 [2019-09-07 09:35:50,527 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:35:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-07 09:35:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-09-07 09:35:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-07 09:35:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 159 transitions. [2019-09-07 09:35:50,536 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 159 transitions. Word has length 133 [2019-09-07 09:35:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:50,537 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 159 transitions. [2019-09-07 09:35:50,537 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:35:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 159 transitions. [2019-09-07 09:35:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-09-07 09:35:50,538 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:50,539 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:50,539 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash 943124674, now seen corresponding path program 16 times [2019-09-07 09:35:50,539 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:50,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:50,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:50,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:35:50,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-09-07 09:35:50,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:50,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:50,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:35:50,845 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:35:50,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:35:50,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:35:50,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:35:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-09-07 09:35:51,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:35:51,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2019-09-07 09:35:51,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 09:35:51,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 09:35:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:35:51,154 INFO L87 Difference]: Start difference. First operand 154 states and 159 transitions. Second operand 29 states. [2019-09-07 09:35:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:35:51,495 INFO L93 Difference]: Finished difference Result 292 states and 306 transitions. [2019-09-07 09:35:51,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:35:51,496 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 149 [2019-09-07 09:35:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:35:51,498 INFO L225 Difference]: With dead ends: 292 [2019-09-07 09:35:51,498 INFO L226 Difference]: Without dead ends: 169 [2019-09-07 09:35:51,499 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2019-09-07 09:35:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-07 09:35:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2019-09-07 09:35:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-07 09:35:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 169 transitions. [2019-09-07 09:35:51,505 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 169 transitions. Word has length 149 [2019-09-07 09:35:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:35:51,505 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 169 transitions. [2019-09-07 09:35:51,506 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 09:35:51,506 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 169 transitions. [2019-09-07 09:35:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-07 09:35:51,507 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:35:51,507 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:35:51,508 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:35:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:35:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2142907608, now seen corresponding path program 17 times [2019-09-07 09:35:51,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:35:51,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:35:51,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:51,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:35:51,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:35:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:35:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-09-07 09:35:51,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:35:51,692 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:35:51,704 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:37:42,639 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-09-07 09:37:42,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:42,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:37:42,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2019-09-07 09:37:42,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:42,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-09-07 09:37:42,982 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:37:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:37:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:37:42,983 INFO L87 Difference]: Start difference. First operand 164 states and 169 transitions. Second operand 31 states. [2019-09-07 09:37:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:43,317 INFO L93 Difference]: Finished difference Result 310 states and 324 transitions. [2019-09-07 09:37:43,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:37:43,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 159 [2019-09-07 09:37:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:43,319 INFO L225 Difference]: With dead ends: 310 [2019-09-07 09:37:43,319 INFO L226 Difference]: Without dead ends: 179 [2019-09-07 09:37:43,320 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:37:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-07 09:37:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2019-09-07 09:37:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-09-07 09:37:43,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2019-09-07 09:37:43,327 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 159 [2019-09-07 09:37:43,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:43,327 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2019-09-07 09:37:43,327 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:37:43,327 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2019-09-07 09:37:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-07 09:37:43,329 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:43,329 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:43,330 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:43,330 INFO L82 PathProgramCache]: Analyzing trace with hash -766737042, now seen corresponding path program 18 times [2019-09-07 09:37:43,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:43,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:43,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:43,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:43,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-07 09:37:43,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:43,531 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:37:43,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:39:05,826 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-07 09:39:05,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:39:05,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 09:39:05,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:39:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2019-09-07 09:39:06,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:39:06,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 35 [2019-09-07 09:39:06,208 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-07 09:39:06,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-07 09:39:06,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 09:39:06,209 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 35 states. [2019-09-07 09:39:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:39:06,895 INFO L93 Difference]: Finished difference Result 329 states and 344 transitions. [2019-09-07 09:39:06,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-07 09:39:06,896 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 169 [2019-09-07 09:39:06,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:39:06,898 INFO L225 Difference]: With dead ends: 329 [2019-09-07 09:39:06,898 INFO L226 Difference]: Without dead ends: 190 [2019-09-07 09:39:06,899 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1923, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 09:39:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-09-07 09:39:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2019-09-07 09:39:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-09-07 09:39:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2019-09-07 09:39:06,906 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2019-09-07 09:39:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:39:06,907 INFO L475 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2019-09-07 09:39:06,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-07 09:39:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2019-09-07 09:39:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-09-07 09:39:06,909 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:39:06,909 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:39:06,909 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:39:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:39:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1497380642, now seen corresponding path program 19 times [2019-09-07 09:39:06,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:39:06,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:39:06,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:06,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:39:06,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:39:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-09-07 09:39:07,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:39:07,136 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:39:07,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:39:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:39:07,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:39:07,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:39:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:39:07,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:39:07,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:39:07,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:39:07,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:39:07,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:39:07,303 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 20 states. [2019-09-07 09:39:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:39:07,370 INFO L93 Difference]: Finished difference Result 336 states and 346 transitions. [2019-09-07 09:39:07,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:39:07,371 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 181 [2019-09-07 09:39:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:39:07,372 INFO L225 Difference]: With dead ends: 336 [2019-09-07 09:39:07,372 INFO L226 Difference]: Without dead ends: 189 [2019-09-07 09:39:07,373 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:39:07,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-09-07 09:39:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-09-07 09:39:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-09-07 09:39:07,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 193 transitions. [2019-09-07 09:39:07,380 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 193 transitions. Word has length 181 [2019-09-07 09:39:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:39:07,380 INFO L475 AbstractCegarLoop]: Abstraction has 188 states and 193 transitions. [2019-09-07 09:39:07,380 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:39:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 193 transitions. [2019-09-07 09:39:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-09-07 09:39:07,383 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:39:07,383 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:39:07,383 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:39:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:39:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash 857695296, now seen corresponding path program 20 times [2019-09-07 09:39:07,385 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:39:07,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:39:07,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:07,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:39:07,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:39:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2019-09-07 09:39:07,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:39:07,796 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:39:07,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:39:07,886 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:39:07,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:39:07,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:39:07,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:39:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-09-07 09:39:08,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:39:08,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-09-07 09:39:08,253 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 09:39:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 09:39:08,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:39:08,254 INFO L87 Difference]: Start difference. First operand 188 states and 193 transitions. Second operand 37 states. [2019-09-07 09:39:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:39:08,706 INFO L93 Difference]: Finished difference Result 350 states and 364 transitions. [2019-09-07 09:39:08,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 09:39:08,712 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 183 [2019-09-07 09:39:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:39:08,713 INFO L225 Difference]: With dead ends: 350 [2019-09-07 09:39:08,713 INFO L226 Difference]: Without dead ends: 203 [2019-09-07 09:39:08,714 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:39:08,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-09-07 09:39:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2019-09-07 09:39:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-09-07 09:39:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2019-09-07 09:39:08,721 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 183 [2019-09-07 09:39:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:39:08,722 INFO L475 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2019-09-07 09:39:08,722 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 09:39:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2019-09-07 09:39:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-09-07 09:39:08,724 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:39:08,724 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:39:08,724 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:39:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:39:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1470044886, now seen corresponding path program 21 times [2019-09-07 09:39:08,725 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:39:08,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:39:08,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:08,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:39:08,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:39:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1191 trivial. 0 not checked. [2019-09-07 09:39:09,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:39:09,012 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:39:09,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:40:49,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-07 09:40:49,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:40:49,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-07 09:40:49,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:40:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 68 proven. 289 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2019-09-07 09:40:49,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:40:49,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 25 [2019-09-07 09:40:49,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:40:49,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:40:49,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:40:49,656 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 25 states. [2019-09-07 09:40:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:40:50,509 INFO L93 Difference]: Finished difference Result 333 states and 349 transitions. [2019-09-07 09:40:50,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:40:50,510 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 193 [2019-09-07 09:40:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:40:50,512 INFO L225 Difference]: With dead ends: 333 [2019-09-07 09:40:50,512 INFO L226 Difference]: Without dead ends: 214 [2019-09-07 09:40:50,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=719, Invalid=1261, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 09:40:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-09-07 09:40:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2019-09-07 09:40:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-09-07 09:40:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 219 transitions. [2019-09-07 09:40:50,522 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 219 transitions. Word has length 193 [2019-09-07 09:40:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:40:50,523 INFO L475 AbstractCegarLoop]: Abstraction has 214 states and 219 transitions. [2019-09-07 09:40:50,523 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:40:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 219 transitions. [2019-09-07 09:40:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-07 09:40:50,526 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:40:50,527 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:40:50,527 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:40:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:40:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash -20675386, now seen corresponding path program 22 times [2019-09-07 09:40:50,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:40:50,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:40:50,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:50,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:40:50,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:40:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2019-09-07 09:40:50,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:40:50,942 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:40:50,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:40:51,090 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:40:51,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:40:51,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:40:51,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:40:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2019-09-07 09:40:51,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:40:51,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:40:51,151 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:40:51,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:40:51,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:40:51,153 INFO L87 Difference]: Start difference. First operand 214 states and 219 transitions. Second operand 22 states. [2019-09-07 09:40:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:40:51,227 INFO L93 Difference]: Finished difference Result 388 states and 398 transitions. [2019-09-07 09:40:51,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:40:51,228 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 209 [2019-09-07 09:40:51,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:40:51,229 INFO L225 Difference]: With dead ends: 388 [2019-09-07 09:40:51,229 INFO L226 Difference]: Without dead ends: 217 [2019-09-07 09:40:51,230 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:40:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-09-07 09:40:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2019-09-07 09:40:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-09-07 09:40:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2019-09-07 09:40:51,238 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 209 [2019-09-07 09:40:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:40:51,238 INFO L475 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2019-09-07 09:40:51,238 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:40:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2019-09-07 09:40:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-07 09:40:51,239 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:40:51,240 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:40:51,241 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:40:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:40:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1185609956, now seen corresponding path program 23 times [2019-09-07 09:40:51,241 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:40:51,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:40:51,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:51,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:40:51,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:40:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:40:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2019-09-07 09:40:51,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:40:51,666 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:40:51,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:43:46,187 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 09:43:46,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:46,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:43:46,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2019-09-07 09:43:46,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:46,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2019-09-07 09:43:46,719 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-07 09:43:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-07 09:43:46,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 09:43:46,721 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 42 states. [2019-09-07 09:43:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:47,223 INFO L93 Difference]: Finished difference Result 402 states and 416 transitions. [2019-09-07 09:43:47,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-07 09:43:47,224 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 211 [2019-09-07 09:43:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:47,225 INFO L225 Difference]: With dead ends: 402 [2019-09-07 09:43:47,225 INFO L226 Difference]: Without dead ends: 231 [2019-09-07 09:43:47,227 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2019-09-07 09:43:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-09-07 09:43:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 226. [2019-09-07 09:43:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-09-07 09:43:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 231 transitions. [2019-09-07 09:43:47,235 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 231 transitions. Word has length 211 [2019-09-07 09:43:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:47,235 INFO L475 AbstractCegarLoop]: Abstraction has 226 states and 231 transitions. [2019-09-07 09:43:47,235 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-07 09:43:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 231 transitions. [2019-09-07 09:43:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-07 09:43:47,237 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:47,237 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:47,237 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:47,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1234406790, now seen corresponding path program 24 times [2019-09-07 09:43:47,238 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:47,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:47,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:47,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:47,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-09-07 09:43:47,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:47,564 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:47,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:46:18,717 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-07 09:46:18,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:46:18,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:46:18,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:46:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-09-07 09:46:19,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:46:19,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2019-09-07 09:46:19,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 09:46:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 09:46:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 09:46:19,245 INFO L87 Difference]: Start difference. First operand 226 states and 231 transitions. Second operand 44 states. [2019-09-07 09:46:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:46:19,785 INFO L93 Difference]: Finished difference Result 420 states and 434 transitions. [2019-09-07 09:46:19,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 09:46:19,787 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 221 [2019-09-07 09:46:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:46:19,789 INFO L225 Difference]: With dead ends: 420 [2019-09-07 09:46:19,789 INFO L226 Difference]: Without dead ends: 241 [2019-09-07 09:46:19,790 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 09:46:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-09-07 09:46:19,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 236. [2019-09-07 09:46:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-09-07 09:46:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 241 transitions. [2019-09-07 09:46:19,798 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 241 transitions. Word has length 221 [2019-09-07 09:46:19,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:46:19,799 INFO L475 AbstractCegarLoop]: Abstraction has 236 states and 241 transitions. [2019-09-07 09:46:19,799 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 09:46:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 241 transitions. [2019-09-07 09:46:19,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-09-07 09:46:19,800 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:46:19,801 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:46:19,801 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:46:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:46:19,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1197353104, now seen corresponding path program 25 times [2019-09-07 09:46:19,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:46:19,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:46:19,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:19,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:46:19,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2019-09-07 09:46:20,163 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:46:20,163 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:46:20,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:46:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:20,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:46:20,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:46:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (26)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:46:20,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:46:20,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 09:46:20,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:46:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:46:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:46:20,376 INFO L87 Difference]: Start difference. First operand 236 states and 241 transitions. Second operand 25 states. [2019-09-07 09:46:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:46:20,453 INFO L93 Difference]: Finished difference Result 426 states and 436 transitions. [2019-09-07 09:46:20,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:46:20,454 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 231 [2019-09-07 09:46:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:46:20,455 INFO L225 Difference]: With dead ends: 426 [2019-09-07 09:46:20,456 INFO L226 Difference]: Without dead ends: 239 [2019-09-07 09:46:20,456 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:46:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-09-07 09:46:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2019-09-07 09:46:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-09-07 09:46:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 243 transitions. [2019-09-07 09:46:20,478 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 243 transitions. Word has length 231 [2019-09-07 09:46:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:46:20,479 INFO L475 AbstractCegarLoop]: Abstraction has 238 states and 243 transitions. [2019-09-07 09:46:20,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:46:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 243 transitions. [2019-09-07 09:46:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-07 09:46:20,481 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:46:20,481 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:46:20,481 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:46:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:46:20,481 INFO L82 PathProgramCache]: Analyzing trace with hash 705008174, now seen corresponding path program 26 times [2019-09-07 09:46:20,482 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:46:20,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:46:20,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:20,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:46:20,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2248 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2019-09-07 09:46:20,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:46:20,844 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:46:20,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:46:20,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:46:20,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:46:20,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:46:21,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:46:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2248 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2019-09-07 09:46:21,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:46:21,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-09-07 09:46:21,607 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-07 09:46:21,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-07 09:46:21,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:46:21,609 INFO L87 Difference]: Start difference. First operand 238 states and 243 transitions. Second operand 47 states. [2019-09-07 09:46:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:46:22,110 INFO L93 Difference]: Finished difference Result 440 states and 454 transitions. [2019-09-07 09:46:22,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-07 09:46:22,110 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 233 [2019-09-07 09:46:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:46:22,112 INFO L225 Difference]: With dead ends: 440 [2019-09-07 09:46:22,112 INFO L226 Difference]: Without dead ends: 253 [2019-09-07 09:46:22,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:46:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-09-07 09:46:22,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 248. [2019-09-07 09:46:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-09-07 09:46:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 253 transitions. [2019-09-07 09:46:22,124 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 253 transitions. Word has length 233 [2019-09-07 09:46:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:46:22,124 INFO L475 AbstractCegarLoop]: Abstraction has 248 states and 253 transitions. [2019-09-07 09:46:22,124 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-07 09:46:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 253 transitions. [2019-09-07 09:46:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-09-07 09:46:22,126 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:46:22,126 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:46:22,126 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:46:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:46:22,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1528498364, now seen corresponding path program 27 times [2019-09-07 09:46:22,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:46:22,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:46:22,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:22,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:46:22,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2465 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2019-09-07 09:46:22,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:46:22,570 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:46:22,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000