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_init1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:44:19,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:44:19,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:44:19,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:44:19,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:44:19,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:44:19,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:44:19,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:44:19,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:44:19,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:44:19,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:44:19,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:44:19,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:44:19,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:44:19,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:44:19,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:44:19,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:44:19,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:44:19,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:44:19,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:44:19,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:44:19,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:44:19,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:44:19,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:44:19,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:44:19,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:44:19,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:44:19,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:44:19,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:44:19,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:44:19,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:44:19,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:44:19,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:44:19,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:44:19,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:44:19,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:44:19,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:44:20,018 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:44:20,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:44:20,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:44:20,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:44:20,020 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:44:20,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:44:20,021 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:44:20,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:44:20,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:44:20,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:44:20,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:44:20,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:44:20,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:44:20,024 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:44:20,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:44:20,024 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:44:20,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:44:20,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:44:20,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:44:20,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:44:20,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:44:20,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:20,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:44:20,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:44:20,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:44:20,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:44:20,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:44:20,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:44:20,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:44:20,355 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:44:20,371 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:44:20,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:44:20,378 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:44:20,378 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:44:20,379 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2019-10-14 21:44:20,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/622ea7923/94ecb6e12b7347748086188986786abd/FLAG9d6fba0bd [2019-10-14 21:44:20,941 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:44:20,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init1_ground-1.i [2019-10-14 21:44:20,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/622ea7923/94ecb6e12b7347748086188986786abd/FLAG9d6fba0bd [2019-10-14 21:44:21,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/622ea7923/94ecb6e12b7347748086188986786abd [2019-10-14 21:44:21,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:44:21,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:44:21,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:21,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:44:21,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:44:21,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dea371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21, skipping insertion in model container [2019-10-14 21:44:21,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,345 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:44:21,365 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:44:21,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:21,610 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:44:21,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:21,661 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:44:21,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21 WrapperNode [2019-10-14 21:44:21,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:21,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:44:21,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:44:21,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:44:21,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (1/1) ... [2019-10-14 21:44:21,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:44:21,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:44:21,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:44:21,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:44:21,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:21,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:44:21,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:44:21,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:44:21,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:44:21,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:44:21,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:44:21,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:44:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:44:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:44:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:44:21,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:44:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:44:21,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:44:22,115 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:44:22,115 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:44:22,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:22 BoogieIcfgContainer [2019-10-14 21:44:22,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:44:22,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:44:22,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:44:22,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:44:22,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:44:21" (1/3) ... [2019-10-14 21:44:22,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b473fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:22, skipping insertion in model container [2019-10-14 21:44:22,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:21" (2/3) ... [2019-10-14 21:44:22,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b473fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:22, skipping insertion in model container [2019-10-14 21:44:22,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:22" (3/3) ... [2019-10-14 21:44:22,125 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-1.i [2019-10-14 21:44:22,138 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:44:22,146 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:44:22,160 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:44:22,198 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:44:22,201 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:44:22,202 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:44:22,202 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:44:22,202 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:44:22,202 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:44:22,202 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:44:22,203 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:44:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-14 21:44:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 21:44:22,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:22,246 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:22,248 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash -441053002, now seen corresponding path program 1 times [2019-10-14 21:44:22,267 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:22,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509472966] [2019-10-14 21:44:22,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:22,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509472966] [2019-10-14 21:44:22,492 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:22,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:44:22,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313025106] [2019-10-14 21:44:22,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:44:22,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:22,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:44:22,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:22,512 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-14 21:44:22,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:22,593 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-10-14 21:44:22,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:44:22,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-14 21:44:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:22,603 INFO L225 Difference]: With dead ends: 39 [2019-10-14 21:44:22,604 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 21:44:22,607 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 21:44:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-14 21:44:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 21:44:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-10-14 21:44:22,644 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-10-14 21:44:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:22,645 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-10-14 21:44:22,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:44:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-10-14 21:44:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 21:44:22,646 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:22,646 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:22,647 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:22,647 INFO L82 PathProgramCache]: Analyzing trace with hash 303899570, now seen corresponding path program 1 times [2019-10-14 21:44:22,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:22,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772799264] [2019-10-14 21:44:22,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:22,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772799264] [2019-10-14 21:44:22,715 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:22,715 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:22,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403864729] [2019-10-14 21:44:22,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:22,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:22,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:22,718 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-10-14 21:44:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:22,781 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-14 21:44:22,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:22,782 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-14 21:44:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:22,783 INFO L225 Difference]: With dead ends: 30 [2019-10-14 21:44:22,783 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 21:44:22,784 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:22,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 21:44:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 21:44:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 21:44:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-14 21:44:22,791 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2019-10-14 21:44:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:22,792 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-14 21:44:22,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-14 21:44:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:44:22,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:22,793 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:22,794 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:22,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1260126610, now seen corresponding path program 1 times [2019-10-14 21:44:22,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:22,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659755644] [2019-10-14 21:44:22,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:22,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:22,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659755644] [2019-10-14 21:44:22,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566827738] [2019-10-14 21:44:22,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:22,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:22,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:22,996 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:22,996 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:44:22,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663077006] [2019-10-14 21:44:22,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:44:22,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:22,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:44:22,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:22,999 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2019-10-14 21:44:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:23,094 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-10-14 21:44:23,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:44:23,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-10-14 21:44:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:23,096 INFO L225 Difference]: With dead ends: 31 [2019-10-14 21:44:23,096 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:44:23,097 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:44:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:44:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:44:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:44:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-14 21:44:23,103 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-10-14 21:44:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:23,103 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-14 21:44:23,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:44:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-14 21:44:23,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:44:23,104 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:23,104 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:23,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,309 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:23,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1794669362, now seen corresponding path program 2 times [2019-10-14 21:44:23,310 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:23,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115688639] [2019-10-14 21:44:23,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:23,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115688639] [2019-10-14 21:44:23,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76023458] [2019-10-14 21:44:23,419 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,470 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:23,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:23,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:23,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:23,496 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:23,496 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:44:23,497 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889671634] [2019-10-14 21:44:23,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:44:23,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:23,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:44:23,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:23,500 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2019-10-14 21:44:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:23,577 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-10-14 21:44:23,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:44:23,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-10-14 21:44:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:23,579 INFO L225 Difference]: With dead ends: 32 [2019-10-14 21:44:23,579 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 21:44:23,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 21:44:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 21:44:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:44:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-14 21:44:23,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2019-10-14 21:44:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:23,586 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-14 21:44:23,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:44:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-10-14 21:44:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:44:23,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:23,588 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:23,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,791 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2004063982, now seen corresponding path program 3 times [2019-10-14 21:44:23,793 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:23,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116062336] [2019-10-14 21:44:23,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:23,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:23,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116062336] [2019-10-14 21:44:23,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675071489] [2019-10-14 21:44:23,901 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:23,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:44:23,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:23,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:44:23,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:23,976 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:23,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:44:23,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703043270] [2019-10-14 21:44:23,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:44:23,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:44:23,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:23,978 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2019-10-14 21:44:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:24,043 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-10-14 21:44:24,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:44:24,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-10-14 21:44:24,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:24,047 INFO L225 Difference]: With dead ends: 33 [2019-10-14 21:44:24,047 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:44:24,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:44:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 21:44:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 21:44:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-10-14 21:44:24,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2019-10-14 21:44:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:24,055 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-10-14 21:44:24,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:44:24,057 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-10-14 21:44:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:44:24,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:24,058 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:24,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:24,260 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:24,260 INFO L82 PathProgramCache]: Analyzing trace with hash -94637390, now seen corresponding path program 4 times [2019-10-14 21:44:24,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:24,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983149988] [2019-10-14 21:44:24,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:24,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:24,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:24,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983149988] [2019-10-14 21:44:24,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543326180] [2019-10-14 21:44:24,369 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:24,419 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:24,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:24,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:44:24,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:24,446 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:24,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:44:24,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304412736] [2019-10-14 21:44:24,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:44:24,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:44:24,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:24,448 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-10-14 21:44:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:24,517 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-10-14 21:44:24,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:44:24,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-10-14 21:44:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:24,519 INFO L225 Difference]: With dead ends: 34 [2019-10-14 21:44:24,519 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:44:24,520 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:44:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:44:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:44:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-14 21:44:24,531 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2019-10-14 21:44:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:24,532 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-14 21:44:24,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:44:24,532 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-14 21:44:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:44:24,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:24,533 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:24,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:24,734 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -729870482, now seen corresponding path program 5 times [2019-10-14 21:44:24,735 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:24,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-14 21:44:24,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:24,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:24,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:24,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012568566] [2019-10-14 21:44:24,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41658281] [2019-10-14 21:44:24,833 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:24,873 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:44:24,873 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:24,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:44:24,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:24,893 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:24,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:44:24,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944815343] [2019-10-14 21:44:24,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:44:24,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:44:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:24,896 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-10-14 21:44:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:24,972 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-10-14 21:44:24,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:44:24,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-10-14 21:44:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:24,973 INFO L225 Difference]: With dead ends: 35 [2019-10-14 21:44:24,974 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:44:24,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:24,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:44:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:44:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:44:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-14 21:44:24,979 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2019-10-14 21:44:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:24,980 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-14 21:44:24,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:44:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-14 21:44:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:44:24,981 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:24,981 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:25,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,186 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:25,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1052740146, now seen corresponding path program 6 times [2019-10-14 21:44:25,187 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:25,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315895409] [2019-10-14 21:44:25,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315895409] [2019-10-14 21:44:25,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213286934] [2019-10-14 21:44:25,319 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,367 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:44:25,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:25,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:44:25,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,393 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:25,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:44:25,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956991451] [2019-10-14 21:44:25,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:44:25,394 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:25,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:44:25,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:25,395 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2019-10-14 21:44:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:25,480 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-10-14 21:44:25,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:44:25,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-10-14 21:44:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:25,481 INFO L225 Difference]: With dead ends: 36 [2019-10-14 21:44:25,481 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:44:25,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:44:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:44:25,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 21:44:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:44:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-14 21:44:25,487 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2019-10-14 21:44:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:25,488 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-14 21:44:25,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:44:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-14 21:44:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:44:25,489 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:25,489 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:25,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,694 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash 479094766, now seen corresponding path program 7 times [2019-10-14 21:44:25,695 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:25,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328831374] [2019-10-14 21:44:25,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:25,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328831374] [2019-10-14 21:44:25,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103637238] [2019-10-14 21:44:25,809 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:25,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:44:25,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:25,882 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:25,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:44:25,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341079393] [2019-10-14 21:44:25,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:44:25,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:44:25,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:25,884 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2019-10-14 21:44:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:25,979 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-10-14 21:44:25,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:44:25,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-10-14 21:44:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:25,981 INFO L225 Difference]: With dead ends: 37 [2019-10-14 21:44:25,981 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:44:25,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:44:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:44:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:44:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-10-14 21:44:25,991 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2019-10-14 21:44:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:25,991 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-10-14 21:44:25,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:44:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-10-14 21:44:25,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:44:25,992 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:25,992 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:26,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,193 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:26,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:26,194 INFO L82 PathProgramCache]: Analyzing trace with hash -124042830, now seen corresponding path program 8 times [2019-10-14 21:44:26,194 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:26,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403687571] [2019-10-14 21:44:26,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:26,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403687571] [2019-10-14 21:44:26,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726716285] [2019-10-14 21:44:26,319 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:26,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:26,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:44:26,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:26,380 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:26,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:44:26,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611163183] [2019-10-14 21:44:26,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:44:26,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:26,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:44:26,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:26,382 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-10-14 21:44:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:26,451 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-10-14 21:44:26,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:44:26,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-10-14 21:44:26,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:26,452 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:44:26,453 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:44:26,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:44:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:44:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:44:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:44:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-10-14 21:44:26,458 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2019-10-14 21:44:26,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:26,458 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-10-14 21:44:26,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:44:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-10-14 21:44:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:44:26,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:26,459 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:26,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,661 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1641439122, now seen corresponding path program 9 times [2019-10-14 21:44:26,662 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:26,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654570653] [2019-10-14 21:44:26,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:26,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:26,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654570653] [2019-10-14 21:44:26,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246940687] [2019-10-14 21:44:26,778 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:26,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:44:26,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:26,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:44:26,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:26,856 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:26,856 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:44:26,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265306095] [2019-10-14 21:44:26,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:44:26,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:44:26,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:26,858 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2019-10-14 21:44:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:26,935 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-10-14 21:44:26,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:44:26,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-10-14 21:44:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:26,938 INFO L225 Difference]: With dead ends: 39 [2019-10-14 21:44:26,938 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:44:26,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:44:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:44:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:44:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:44:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-10-14 21:44:26,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2019-10-14 21:44:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:26,949 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-10-14 21:44:26,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:44:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-10-14 21:44:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:44:26,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:26,950 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:27,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,155 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1436083918, now seen corresponding path program 10 times [2019-10-14 21:44:27,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:27,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441475533] [2019-10-14 21:44:27,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,156 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:27,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441475533] [2019-10-14 21:44:27,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278486027] [2019-10-14 21:44:27,299 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,331 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:27,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:27,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:44:27,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:27,352 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:27,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:44:27,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859887019] [2019-10-14 21:44:27,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:44:27,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:44:27,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:27,354 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 15 states. [2019-10-14 21:44:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:27,452 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-10-14 21:44:27,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:44:27,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-10-14 21:44:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:27,454 INFO L225 Difference]: With dead ends: 40 [2019-10-14 21:44:27,454 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 21:44:27,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:44:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 21:44:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 21:44:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:44:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-10-14 21:44:27,461 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2019-10-14 21:44:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:27,461 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-10-14 21:44:27,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:44:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-10-14 21:44:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:44:27,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:27,462 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:27,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,666 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:27,667 INFO L82 PathProgramCache]: Analyzing trace with hash 634960110, now seen corresponding path program 11 times [2019-10-14 21:44:27,667 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:27,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564721875] [2019-10-14 21:44:27,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:27,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:27,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564721875] [2019-10-14 21:44:27,811 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281804421] [2019-10-14 21:44:27,811 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:27,893 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 21:44:27,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:27,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:44:27,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:27,921 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:27,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:44:27,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816765524] [2019-10-14 21:44:27,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:44:27,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:44:27,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:44:27,929 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 16 states. [2019-10-14 21:44:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:28,024 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-10-14 21:44:28,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:44:28,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-10-14 21:44:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:28,026 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:44:28,026 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:44:28,027 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:44:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:44:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 21:44:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:44:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-10-14 21:44:28,031 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2019-10-14 21:44:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:28,032 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-10-14 21:44:28,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:44:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-10-14 21:44:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:44:28,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:28,033 INFO L380 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:28,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,237 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:28,238 INFO L82 PathProgramCache]: Analyzing trace with hash 412815538, now seen corresponding path program 12 times [2019-10-14 21:44:28,238 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:28,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107636719] [2019-10-14 21:44:28,239 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,239 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:28,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107636719] [2019-10-14 21:44:28,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743912256] [2019-10-14 21:44:28,394 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,472 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:44:28,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:28,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:44:28,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:28,490 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:28,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-14 21:44:28,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684894828] [2019-10-14 21:44:28,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:44:28,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:44:28,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:44:28,492 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2019-10-14 21:44:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:28,532 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-10-14 21:44:28,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:44:28,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2019-10-14 21:44:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:28,533 INFO L225 Difference]: With dead ends: 42 [2019-10-14 21:44:28,534 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:44:28,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:44:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:44:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 21:44:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:44:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-10-14 21:44:28,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2019-10-14 21:44:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:28,539 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-10-14 21:44:28,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:44:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-10-14 21:44:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:44:28,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:28,540 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:28,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,745 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2116268398, now seen corresponding path program 13 times [2019-10-14 21:44:28,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:28,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553209205] [2019-10-14 21:44:28,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:28,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:28,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553209205] [2019-10-14 21:44:28,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181303584] [2019-10-14 21:44:28,914 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:28,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:44:28,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:28,994 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:28,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:44:28,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531532078] [2019-10-14 21:44:28,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:44:28,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:44:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:44:28,996 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 18 states. [2019-10-14 21:44:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:29,086 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-10-14 21:44:29,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:44:29,087 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2019-10-14 21:44:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:29,087 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:44:29,087 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:44:29,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:44:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:44:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 21:44:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:44:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-10-14 21:44:29,093 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2019-10-14 21:44:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:29,093 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-10-14 21:44:29,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:44:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-10-14 21:44:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:44:29,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:29,094 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:29,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:29,295 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:29,296 INFO L82 PathProgramCache]: Analyzing trace with hash -911267790, now seen corresponding path program 14 times [2019-10-14 21:44:29,296 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:29,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543467874] [2019-10-14 21:44:29,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:29,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543467874] [2019-10-14 21:44:29,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979526246] [2019-10-14 21:44:29,503 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:29,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:29,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:29,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:44:29,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:29,595 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:29,597 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:44:29,598 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222535904] [2019-10-14 21:44:29,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:44:29,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:44:29,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:44:29,600 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 19 states. [2019-10-14 21:44:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:29,716 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-10-14 21:44:29,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:44:29,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2019-10-14 21:44:29,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:29,718 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:44:29,718 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:44:29,719 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:44:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:44:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 21:44:29,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:44:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-10-14 21:44:29,735 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2019-10-14 21:44:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:29,736 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-10-14 21:44:29,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:44:29,736 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-10-14 21:44:29,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:44:29,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:29,738 INFO L380 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:29,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:29,939 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:29,939 INFO L82 PathProgramCache]: Analyzing trace with hash -275609106, now seen corresponding path program 15 times [2019-10-14 21:44:29,939 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:29,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254883860] [2019-10-14 21:44:29,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:29,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:30,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254883860] [2019-10-14 21:44:30,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203979076] [2019-10-14 21:44:30,179 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:30,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:44:30,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:30,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:44:30,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:30,399 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:30,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 21:44:30,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684371757] [2019-10-14 21:44:30,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:44:30,400 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:30,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:44:30,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:44:30,401 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 20 states. [2019-10-14 21:44:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:30,532 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-10-14 21:44:30,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:44:30,532 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2019-10-14 21:44:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:30,533 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:44:30,533 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:44:30,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:44:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:44:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:44:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:44:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-10-14 21:44:30,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2019-10-14 21:44:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:30,539 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-10-14 21:44:30,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:44:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-10-14 21:44:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:44:30,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:30,541 INFO L380 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:30,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:30,745 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:30,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2045026382, now seen corresponding path program 16 times [2019-10-14 21:44:30,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:30,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261179168] [2019-10-14 21:44:30,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:30,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:30,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:31,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261179168] [2019-10-14 21:44:31,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762056404] [2019-10-14 21:44:31,009 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:31,093 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:31,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:31,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:44:31,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:31,131 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:31,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:44:31,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112270607] [2019-10-14 21:44:31,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:44:31,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:44:31,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:44:31,134 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 21 states. [2019-10-14 21:44:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:31,285 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-10-14 21:44:31,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:44:31,286 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-10-14 21:44:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:31,287 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:44:31,287 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:44:31,288 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:44:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:44:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-14 21:44:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:44:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-14 21:44:31,296 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2019-10-14 21:44:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:31,303 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-14 21:44:31,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:44:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-14 21:44:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:44:31,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:31,305 INFO L380 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:31,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:31,513 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:31,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1062387090, now seen corresponding path program 17 times [2019-10-14 21:44:31,513 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:31,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394936732] [2019-10-14 21:44:31,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:31,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:31,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:31,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394936732] [2019-10-14 21:44:31,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666065855] [2019-10-14 21:44:31,730 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:31,835 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 21:44:31,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:31,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:44:31,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:31,865 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:31,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:44:31,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037915414] [2019-10-14 21:44:31,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:44:31,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:44:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:44:31,866 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 22 states. [2019-10-14 21:44:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:31,975 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-10-14 21:44:31,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:44:31,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-10-14 21:44:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:31,977 INFO L225 Difference]: With dead ends: 47 [2019-10-14 21:44:31,977 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:44:31,978 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:44:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:44:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 21:44:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:44:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-10-14 21:44:31,989 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2019-10-14 21:44:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:31,989 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-10-14 21:44:31,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:44:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-10-14 21:44:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:44:31,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:31,990 INFO L380 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:32,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:32,197 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash -665340110, now seen corresponding path program 18 times [2019-10-14 21:44:32,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:32,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559791869] [2019-10-14 21:44:32,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:32,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:32,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:32,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559791869] [2019-10-14 21:44:32,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831182753] [2019-10-14 21:44:32,456 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:32,743 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-14 21:44:32,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:32,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:44:32,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:32,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:32,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 21:44:32,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539055099] [2019-10-14 21:44:32,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:44:32,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:44:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:44:32,770 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 23 states. [2019-10-14 21:44:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:32,862 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-10-14 21:44:32,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:44:32,863 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2019-10-14 21:44:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:32,863 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:44:32,864 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:44:32,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:44:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:44:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 21:44:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 21:44:32,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-14 21:44:32,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2019-10-14 21:44:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:32,868 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-14 21:44:32,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:44:32,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-14 21:44:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:44:32,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:32,869 INFO L380 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:33,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:33,070 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1241785618, now seen corresponding path program 19 times [2019-10-14 21:44:33,071 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:33,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987296419] [2019-10-14 21:44:33,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:33,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:33,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:33,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987296419] [2019-10-14 21:44:33,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336206604] [2019-10-14 21:44:33,333 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:33,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:44:33,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:33,404 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:33,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:44:33,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484341279] [2019-10-14 21:44:33,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:44:33,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:33,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:44:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:44:33,405 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 24 states. [2019-10-14 21:44:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:33,514 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2019-10-14 21:44:33,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:44:33,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2019-10-14 21:44:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:33,515 INFO L225 Difference]: With dead ends: 49 [2019-10-14 21:44:33,515 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:44:33,516 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:44:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:44:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 21:44:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:44:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-10-14 21:44:33,520 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2019-10-14 21:44:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:33,520 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-10-14 21:44:33,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:44:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-10-14 21:44:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:44:33,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:33,521 INFO L380 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:33,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:33,722 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:33,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1931727182, now seen corresponding path program 20 times [2019-10-14 21:44:33,723 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:33,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61376729] [2019-10-14 21:44:33,723 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:33,723 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:33,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:34,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61376729] [2019-10-14 21:44:34,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256756798] [2019-10-14 21:44:34,052 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:34,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:34,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:34,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:44:34,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:34,146 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:34,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:44:34,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072368672] [2019-10-14 21:44:34,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:44:34,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:34,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:44:34,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:44:34,147 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2019-10-14 21:44:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:34,287 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-10-14 21:44:34,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:44:34,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2019-10-14 21:44:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:34,289 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:44:34,289 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:44:34,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:44:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:44:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-14 21:44:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:44:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-10-14 21:44:34,293 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2019-10-14 21:44:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:34,294 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-10-14 21:44:34,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:44:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-10-14 21:44:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:44:34,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:34,295 INFO L380 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:34,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:34,498 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1845079186, now seen corresponding path program 21 times [2019-10-14 21:44:34,499 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:34,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235775469] [2019-10-14 21:44:34,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:34,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:34,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:34,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235775469] [2019-10-14 21:44:34,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422338157] [2019-10-14 21:44:34,771 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:35,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 21:44:35,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:35,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:44:35,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:35,482 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:35,482 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 21:44:35,482 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580643146] [2019-10-14 21:44:35,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:44:35,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:35,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:44:35,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:44:35,483 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 26 states. [2019-10-14 21:44:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:35,586 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-10-14 21:44:35,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:44:35,587 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2019-10-14 21:44:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:35,588 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:44:35,588 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:44:35,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:44:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:44:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:44:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:44:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-10-14 21:44:35,597 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2019-10-14 21:44:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:35,598 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-10-14 21:44:35,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:44:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-10-14 21:44:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:44:35,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:35,600 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:35,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:35,801 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash 841008690, now seen corresponding path program 22 times [2019-10-14 21:44:35,801 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:35,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244756715] [2019-10-14 21:44:35,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:35,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:35,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:36,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244756715] [2019-10-14 21:44:36,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879838126] [2019-10-14 21:44:36,107 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:36,172 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:36,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:36,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:44:36,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:36,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:36,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:44:36,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403790870] [2019-10-14 21:44:36,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:44:36,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:44:36,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:44:36,191 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 27 states. [2019-10-14 21:44:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:36,322 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-10-14 21:44:36,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:44:36,323 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2019-10-14 21:44:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:36,324 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:44:36,324 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:44:36,325 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:44:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:44:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 21:44:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:44:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-14 21:44:36,330 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2019-10-14 21:44:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:36,330 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-14 21:44:36,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:44:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-14 21:44:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:44:36,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:36,331 INFO L380 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:36,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:36,532 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:36,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1789613074, now seen corresponding path program 23 times [2019-10-14 21:44:36,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:36,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681890040] [2019-10-14 21:44:36,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:36,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:36,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:36,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681890040] [2019-10-14 21:44:36,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698160629] [2019-10-14 21:44:36,913 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:37,233 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 21:44:37,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:37,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:44:37,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:37,252 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:37,253 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:37,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:44:37,253 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451697988] [2019-10-14 21:44:37,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:44:37,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:44:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:44:37,256 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 28 states. [2019-10-14 21:44:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:37,357 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-10-14 21:44:37,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:44:37,358 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2019-10-14 21:44:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:37,359 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:44:37,359 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:44:37,360 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:44:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:44:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-14 21:44:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:44:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-10-14 21:44:37,364 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2019-10-14 21:44:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:37,365 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-10-14 21:44:37,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:44:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-10-14 21:44:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:44:37,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:37,366 INFO L380 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:37,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:37,567 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:37,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1734509134, now seen corresponding path program 24 times [2019-10-14 21:44:37,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:37,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131168325] [2019-10-14 21:44:37,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:37,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:37,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:37,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131168325] [2019-10-14 21:44:37,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060921567] [2019-10-14 21:44:37,932 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:38,449 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:44:38,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:38,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 21:44:38,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:38,466 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:38,466 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-14 21:44:38,466 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949190995] [2019-10-14 21:44:38,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:44:38,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:38,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:44:38,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:44:38,469 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 29 states. [2019-10-14 21:44:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:38,616 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-10-14 21:44:38,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:44:38,616 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2019-10-14 21:44:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:38,617 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:44:38,617 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:44:38,618 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:44:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:44:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 21:44:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:44:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-10-14 21:44:38,621 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2019-10-14 21:44:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:38,621 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-10-14 21:44:38,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:44:38,622 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-10-14 21:44:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:44:38,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:38,622 INFO L380 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:38,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:38,828 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash -26286994, now seen corresponding path program 25 times [2019-10-14 21:44:38,829 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:38,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482086062] [2019-10-14 21:44:38,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:38,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:38,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:39,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482086062] [2019-10-14 21:44:39,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232382092] [2019-10-14 21:44:39,170 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:39,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:44:39,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:39,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:39,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:44:39,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122555509] [2019-10-14 21:44:39,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:44:39,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:39,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:44:39,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:44:39,243 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2019-10-14 21:44:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:39,389 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2019-10-14 21:44:39,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:44:39,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2019-10-14 21:44:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:39,390 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:44:39,390 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:44:39,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:44:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:44:39,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:44:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:44:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-10-14 21:44:39,393 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2019-10-14 21:44:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:39,394 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-10-14 21:44:39,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:44:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-10-14 21:44:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:44:39,394 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:39,394 INFO L380 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:39,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:39,598 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1388991794, now seen corresponding path program 26 times [2019-10-14 21:44:39,599 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:39,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523062360] [2019-10-14 21:44:39,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:39,600 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:39,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:39,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523062360] [2019-10-14 21:44:39,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132539342] [2019-10-14 21:44:39,951 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:40,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:40,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:40,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:44:40,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:40,043 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:40,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:44:40,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968922073] [2019-10-14 21:44:40,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:44:40,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:44:40,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:44:40,045 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 31 states. [2019-10-14 21:44:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:40,216 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-10-14 21:44:40,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:44:40,217 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2019-10-14 21:44:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:40,218 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:44:40,218 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:44:40,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:44:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:44:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-14 21:44:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:44:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-10-14 21:44:40,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2019-10-14 21:44:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:40,222 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-10-14 21:44:40,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:44:40,222 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-10-14 21:44:40,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:44:40,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:40,223 INFO L380 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:40,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:40,424 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1982006034, now seen corresponding path program 27 times [2019-10-14 21:44:40,425 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:40,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271681781] [2019-10-14 21:44:40,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:40,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:40,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:41,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271681781] [2019-10-14 21:44:41,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673041425] [2019-10-14 21:44:41,046 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:43,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-14 21:44:43,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:43,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:44:43,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:43,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:43,294 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-14 21:44:43,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689363589] [2019-10-14 21:44:43,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:44:43,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:43,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:44:43,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:44:43,299 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 32 states. [2019-10-14 21:44:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:43,462 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-10-14 21:44:43,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:44:43,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2019-10-14 21:44:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:43,463 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:44:43,463 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:44:43,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:44:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:44:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:44:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:44:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-10-14 21:44:43,467 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2019-10-14 21:44:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:43,467 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-10-14 21:44:43,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:44:43,467 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-10-14 21:44:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:44:43,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:43,468 INFO L380 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:43,668 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:43,669 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash 891243698, now seen corresponding path program 28 times [2019-10-14 21:44:43,669 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:43,670 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248849003] [2019-10-14 21:44:43,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:43,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:43,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:44,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248849003] [2019-10-14 21:44:44,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991328049] [2019-10-14 21:44:44,077 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:44,141 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:44,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:44,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:44:44,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:44,157 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:44,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 21:44:44,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367299255] [2019-10-14 21:44:44,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:44:44,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:44:44,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:44:44,159 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 33 states. [2019-10-14 21:44:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:44,325 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-10-14 21:44:44,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:44:44,325 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2019-10-14 21:44:44,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:44,326 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:44:44,326 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:44:44,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:44:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:44:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-14 21:44:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:44:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-10-14 21:44:44,330 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2019-10-14 21:44:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:44,330 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-10-14 21:44:44,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:44:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-10-14 21:44:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:44:44,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:44,331 INFO L380 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:44,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:44,532 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:44,532 INFO L82 PathProgramCache]: Analyzing trace with hash -232327826, now seen corresponding path program 29 times [2019-10-14 21:44:44,533 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:44,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646069868] [2019-10-14 21:44:44,533 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:44,534 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:44,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:45,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646069868] [2019-10-14 21:44:45,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790042692] [2019-10-14 21:44:45,099 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:45,975 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-14 21:44:45,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:45,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:44:45,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:45,995 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:45,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-10-14 21:44:45,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450570782] [2019-10-14 21:44:45,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 21:44:45,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:45,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 21:44:45,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:44:45,997 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 34 states. [2019-10-14 21:44:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:46,062 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-10-14 21:44:46,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:44:46,063 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2019-10-14 21:44:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:46,064 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:44:46,064 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:44:46,065 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:44:46,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:44:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 21:44:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:44:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-10-14 21:44:46,069 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2019-10-14 21:44:46,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:46,070 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-10-14 21:44:46,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 21:44:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-10-14 21:44:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:44:46,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:46,070 INFO L380 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:46,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:46,273 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash -703306702, now seen corresponding path program 30 times [2019-10-14 21:44:46,274 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:46,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368324158] [2019-10-14 21:44:46,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:46,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:46,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:46,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368324158] [2019-10-14 21:44:46,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589932139] [2019-10-14 21:44:46,727 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:49,373 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-14 21:44:49,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:49,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 21:44:49,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:49,409 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:49,410 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-10-14 21:44:49,410 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73234674] [2019-10-14 21:44:49,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:44:49,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:49,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:44:49,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:44:49,411 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 35 states. [2019-10-14 21:44:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:49,587 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-10-14 21:44:49,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:44:49,588 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-10-14 21:44:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:49,589 INFO L225 Difference]: With dead ends: 60 [2019-10-14 21:44:49,589 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:44:49,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:44:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:44:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-14 21:44:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:44:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-10-14 21:44:49,593 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2019-10-14 21:44:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:49,594 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-10-14 21:44:49,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:44:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-10-14 21:44:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:44:49,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:49,595 INFO L380 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:49,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:49,802 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1876217326, now seen corresponding path program 31 times [2019-10-14 21:44:49,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:49,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708169152] [2019-10-14 21:44:49,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:49,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:49,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:50,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708169152] [2019-10-14 21:44:50,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593517545] [2019-10-14 21:44:50,263 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:50,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 21:44:50,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:50,352 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:50,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-14 21:44:50,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909682125] [2019-10-14 21:44:50,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:44:50,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:50,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:44:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:44:50,354 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 36 states. [2019-10-14 21:44:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:50,430 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-10-14 21:44:50,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:44:50,431 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2019-10-14 21:44:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:50,431 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:44:50,432 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:44:50,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:44:50,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:44:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-14 21:44:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:44:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-10-14 21:44:50,435 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2019-10-14 21:44:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:50,436 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-10-14 21:44:50,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:44:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-10-14 21:44:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:44:50,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:50,436 INFO L380 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:50,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:50,637 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:50,638 INFO L82 PathProgramCache]: Analyzing trace with hash 237083570, now seen corresponding path program 32 times [2019-10-14 21:44:50,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:50,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507437960] [2019-10-14 21:44:50,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:50,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:50,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:51,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507437960] [2019-10-14 21:44:51,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468701396] [2019-10-14 21:44:51,150 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:51,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:51,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:51,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:44:51,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:51,241 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:51,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-14 21:44:51,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514276513] [2019-10-14 21:44:51,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:44:51,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:51,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:44:51,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:44:51,244 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 37 states. [2019-10-14 21:44:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:51,452 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2019-10-14 21:44:51,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:44:51,452 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2019-10-14 21:44:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:51,453 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:44:51,453 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:44:51,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:44:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:44:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 21:44:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:44:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-10-14 21:44:51,458 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2019-10-14 21:44:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:51,458 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-10-14 21:44:51,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:44:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-10-14 21:44:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:44:51,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:51,459 INFO L380 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:51,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:51,663 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash 963544686, now seen corresponding path program 33 times [2019-10-14 21:44:51,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:51,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127955064] [2019-10-14 21:44:51,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:51,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:51,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:52,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127955064] [2019-10-14 21:44:52,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161948238] [2019-10-14 21:44:52,364 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:01,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-14 21:45:01,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:01,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 21:45:01,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:01,293 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:01,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2019-10-14 21:45:01,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266801199] [2019-10-14 21:45:01,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:45:01,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:01,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:45:01,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:45:01,295 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2019-10-14 21:45:01,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:01,500 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2019-10-14 21:45:01,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-14 21:45:01,501 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2019-10-14 21:45:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:01,502 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:45:01,502 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:45:01,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:45:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:45:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 21:45:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:45:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-10-14 21:45:01,506 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2019-10-14 21:45:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:01,507 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-10-14 21:45:01,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:45:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-10-14 21:45:01,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:45:01,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:01,507 INFO L380 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:01,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:01,717 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2009002802, now seen corresponding path program 34 times [2019-10-14 21:45:01,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:01,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585474575] [2019-10-14 21:45:01,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:01,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:01,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:02,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585474575] [2019-10-14 21:45:02,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194567292] [2019-10-14 21:45:02,256 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:02,330 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:02,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:02,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 21:45:02,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:02,367 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:02,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-10-14 21:45:02,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438205813] [2019-10-14 21:45:02,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 21:45:02,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:02,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 21:45:02,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:45:02,369 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 39 states. [2019-10-14 21:45:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:02,546 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2019-10-14 21:45:02,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:45:02,546 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2019-10-14 21:45:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:02,547 INFO L225 Difference]: With dead ends: 64 [2019-10-14 21:45:02,547 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:45:02,548 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:45:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:45:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-14 21:45:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:45:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-10-14 21:45:02,551 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2019-10-14 21:45:02,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:02,552 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-10-14 21:45:02,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 21:45:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-10-14 21:45:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:45:02,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:02,552 INFO L380 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:02,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:02,753 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:02,754 INFO L82 PathProgramCache]: Analyzing trace with hash 58466030, now seen corresponding path program 35 times [2019-10-14 21:45:02,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:02,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224447177] [2019-10-14 21:45:02,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:02,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:02,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:03,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224447177] [2019-10-14 21:45:03,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817358591] [2019-10-14 21:45:03,572 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:04,243 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-14 21:45:04,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:04,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2019-10-14 21:45:04,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:04,262 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:04,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2019-10-14 21:45:04,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696557396] [2019-10-14 21:45:04,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:45:04,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:45:04,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:45:04,264 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 40 states. [2019-10-14 21:45:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:04,463 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2019-10-14 21:45:04,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 21:45:04,464 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2019-10-14 21:45:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:04,465 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:45:04,465 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:45:04,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:45:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:45:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-14 21:45:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:45:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-10-14 21:45:04,469 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2019-10-14 21:45:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:04,470 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-10-14 21:45:04,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:45:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-10-14 21:45:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:45:04,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:04,471 INFO L380 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:04,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:04,676 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:04,677 INFO L82 PathProgramCache]: Analyzing trace with hash -278631758, now seen corresponding path program 36 times [2019-10-14 21:45:04,677 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:04,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209065981] [2019-10-14 21:45:04,678 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:04,678 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:04,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:05,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209065981] [2019-10-14 21:45:05,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960057617] [2019-10-14 21:45:05,321 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true