/usr/bin/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-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:48:39,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:48:39,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:48:39,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:48:39,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:48:39,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:48:39,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:48:39,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:48:39,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:48:39,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:48:39,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:48:39,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:48:39,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:48:39,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:48:39,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:48:39,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:48:39,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:48:39,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:48:39,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:48:39,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:48:39,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:48:39,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:48:39,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:48:39,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:48:39,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:48:39,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:48:39,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:48:39,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:48:39,909 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 [2019-11-06 18:48:39,944 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:48:39,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:48:39,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:48:39,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:48:39,949 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:48:39,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:48:39,950 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:48:39,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:48:39,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:48:39,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:48:39,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:48:39,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:48:39,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:48:39,954 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:48:39,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:48:39,954 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:48:39,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:48:39,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:48:39,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:48:39,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:48:39,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:48:39,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:48:39,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:48:39,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:48:39,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:48:39,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:48:39,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:48:39,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:48:39,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:48:40,252 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:48:40,266 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:48:40,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:48:40,272 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:48:40,272 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:48:40,273 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-11-06 18:48:40,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2110c1a/36759ab5c046448d9e34bdf077b9276f/FLAG72017a2ec [2019-11-06 18:48:40,760 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:48:40,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-11-06 18:48:40,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2110c1a/36759ab5c046448d9e34bdf077b9276f/FLAG72017a2ec [2019-11-06 18:48:41,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b2110c1a/36759ab5c046448d9e34bdf077b9276f [2019-11-06 18:48:41,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:48:41,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:48:41,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:48:41,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:48:41,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:48:41,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@186ced83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41, skipping insertion in model container [2019-11-06 18:48:41,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,192 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:48:41,207 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:48:41,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:48:41,393 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:48:41,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:48:41,435 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:48:41,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41 WrapperNode [2019-11-06 18:48:41,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:48:41,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:48:41,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:48:41,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:48:41,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (1/1) ... [2019-11-06 18:48:41,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:48:41,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:48:41,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:48:41,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:48:41,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (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 [2019-11-06 18:48:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:48:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:48:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:48:41,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:48:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:48:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:48:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:48:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:48:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:48:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:48:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:48:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:48:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:48:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:48:41,858 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:48:41,859 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:48:41,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:48:41 BoogieIcfgContainer [2019-11-06 18:48:41,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:48:41,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:48:41,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:48:41,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:48:41,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:48:41" (1/3) ... [2019-11-06 18:48:41,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36330990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:48:41, skipping insertion in model container [2019-11-06 18:48:41,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:41" (2/3) ... [2019-11-06 18:48:41,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36330990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:48:41, skipping insertion in model container [2019-11-06 18:48:41,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:48:41" (3/3) ... [2019-11-06 18:48:41,889 INFO L109 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2019-11-06 18:48:41,903 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:48:41,926 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:48:41,948 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:48:41,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:48:41,985 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:48:41,985 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:48:41,986 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:48:41,986 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:48:41,986 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:48:41,986 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:48:41,986 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:48:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-06 18:48:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:48:42,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:42,011 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:42,013 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash 547567586, now seen corresponding path program 1 times [2019-11-06 18:48:42,025 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:42,025 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899966404] [2019-11-06 18:48:42,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:42,181 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899966404] [2019-11-06 18:48:42,182 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:48:42,182 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:48:42,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718072513] [2019-11-06 18:48:42,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:48:42,188 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:42,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:48:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:48:42,205 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-06 18:48:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:42,299 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2019-11-06 18:48:42,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:48:42,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-06 18:48:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:42,310 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:48:42,310 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 18:48:42,314 INFO L630 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 [2019-11-06 18:48:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 18:48:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-06 18:48:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:48:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-06 18:48:42,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-06 18:48:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:42,357 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-06 18:48:42,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:48:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-06 18:48:42,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:48:42,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:42,359 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:42,359 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1443476915, now seen corresponding path program 1 times [2019-11-06 18:48:42,360 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:42,361 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711197758] [2019-11-06 18:48:42,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:42,442 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711197758] [2019-11-06 18:48:42,443 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:48:42,443 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:48:42,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115494329] [2019-11-06 18:48:42,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:48:42,447 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:42,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:48:42,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:48:42,448 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2019-11-06 18:48:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:42,578 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-11-06 18:48:42,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:48:42,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-06 18:48:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:42,581 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:48:42,582 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:48:42,583 INFO L630 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 [2019-11-06 18:48:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:48:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-11-06 18:48:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 18:48:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-06 18:48:42,594 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-11-06 18:48:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:42,595 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-06 18:48:42,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:48:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-06 18:48:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:48:42,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:42,596 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:42,596 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1901506806, now seen corresponding path program 1 times [2019-11-06 18:48:42,597 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:42,598 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549954073] [2019-11-06 18:48:42,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:42,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549954073] [2019-11-06 18:48:42,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372854338] [2019-11-06 18:48:42,685 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 [2019-11-06 18:48:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:48:42,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:42,807 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:42,807 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:48:42,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275848474] [2019-11-06 18:48:42,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:48:42,812 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:42,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:48:42,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:48:42,814 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-06 18:48:42,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:42,941 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-11-06 18:48:42,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:48:42,941 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-06 18:48:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:42,943 INFO L225 Difference]: With dead ends: 49 [2019-11-06 18:48:42,943 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:48:42,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:48:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:48:42,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2019-11-06 18:48:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:48:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-06 18:48:42,951 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2019-11-06 18:48:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:42,951 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-06 18:48:42,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:48:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-06 18:48:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:48:42,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:42,953 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:43,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:43,158 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:43,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1958890195, now seen corresponding path program 2 times [2019-11-06 18:48:43,159 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:43,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975250137] [2019-11-06 18:48:43,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:43,269 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975250137] [2019-11-06 18:48:43,269 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985701409] [2019-11-06 18:48:43,269 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 [2019-11-06 18:48:43,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:43,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:43,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:48:43,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:43,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:43,337 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:48:43,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902290515] [2019-11-06 18:48:43,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:48:43,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:43,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:48:43,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:48:43,339 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2019-11-06 18:48:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:43,469 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2019-11-06 18:48:43,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:48:43,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-06 18:48:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:43,472 INFO L225 Difference]: With dead ends: 57 [2019-11-06 18:48:43,473 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:48:43,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:48:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:48:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2019-11-06 18:48:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:48:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-06 18:48:43,487 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2019-11-06 18:48:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:43,488 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-06 18:48:43,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:48:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-06 18:48:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:48:43,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:43,489 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:43,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:43,691 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2070448086, now seen corresponding path program 3 times [2019-11-06 18:48:43,692 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:43,693 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016607124] [2019-11-06 18:48:43,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:43,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016607124] [2019-11-06 18:48:43,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720053909] [2019-11-06 18:48:43,809 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 [2019-11-06 18:48:43,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:48:43,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:43,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:48:43,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:43,874 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:43,874 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:48:43,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401419736] [2019-11-06 18:48:43,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:48:43,875 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:43,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:48:43,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:48:43,876 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2019-11-06 18:48:44,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:44,001 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2019-11-06 18:48:44,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:48:44,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-06 18:48:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:44,004 INFO L225 Difference]: With dead ends: 65 [2019-11-06 18:48:44,004 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:48:44,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:48:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:48:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2019-11-06 18:48:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:48:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-06 18:48:44,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2019-11-06 18:48:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:44,012 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-06 18:48:44,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:48:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-06 18:48:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:48:44,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:44,014 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:44,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:44,219 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1186891763, now seen corresponding path program 4 times [2019-11-06 18:48:44,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:44,221 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474782936] [2019-11-06 18:48:44,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:44,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474782936] [2019-11-06 18:48:44,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52834080] [2019-11-06 18:48:44,344 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 [2019-11-06 18:48:44,397 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:44,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:44,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:48:44,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:44,432 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:44,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:48:44,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482716251] [2019-11-06 18:48:44,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:48:44,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:44,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:48:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:48:44,434 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 9 states. [2019-11-06 18:48:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:44,562 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2019-11-06 18:48:44,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:48:44,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-06 18:48:44,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:44,564 INFO L225 Difference]: With dead ends: 73 [2019-11-06 18:48:44,564 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 18:48:44,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:48:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 18:48:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2019-11-06 18:48:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:48:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-11-06 18:48:44,572 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2019-11-06 18:48:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:44,573 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-11-06 18:48:44,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:48:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-11-06 18:48:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:48:44,574 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:44,574 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:44,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:44,778 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:44,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1279936842, now seen corresponding path program 5 times [2019-11-06 18:48:44,779 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:44,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491984437] [2019-11-06 18:48:44,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:44,943 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491984437] [2019-11-06 18:48:44,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177917991] [2019-11-06 18:48:44,944 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 [2019-11-06 18:48:45,051 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:48:45,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:45,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:48:45,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:45,069 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:45,069 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:48:45,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616111510] [2019-11-06 18:48:45,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:48:45,070 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:45,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:48:45,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:48:45,071 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 10 states. [2019-11-06 18:48:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:45,350 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2019-11-06 18:48:45,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:48:45,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-06 18:48:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:45,352 INFO L225 Difference]: With dead ends: 81 [2019-11-06 18:48:45,352 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 18:48:45,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:48:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 18:48:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2019-11-06 18:48:45,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:48:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-06 18:48:45,360 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2019-11-06 18:48:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:45,360 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-06 18:48:45,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:48:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-06 18:48:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:48:45,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:45,361 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:45,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:45,573 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash -614493459, now seen corresponding path program 6 times [2019-11-06 18:48:45,574 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:45,574 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177763746] [2019-11-06 18:48:45,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:45,702 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177763746] [2019-11-06 18:48:45,703 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34883662] [2019-11-06 18:48:45,703 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 [2019-11-06 18:48:45,788 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:48:45,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:45,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:48:45,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:45,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:45,819 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:48:45,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151893078] [2019-11-06 18:48:45,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:48:45,820 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:45,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:48:45,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:45,821 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 11 states. [2019-11-06 18:48:45,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:46,000 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2019-11-06 18:48:46,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:48:46,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-11-06 18:48:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:46,002 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:48:46,002 INFO L226 Difference]: Without dead ends: 77 [2019-11-06 18:48:46,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-06 18:48:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2019-11-06 18:48:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:48:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-11-06 18:48:46,009 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 32 [2019-11-06 18:48:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:46,010 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-11-06 18:48:46,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:48:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-11-06 18:48:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:48:46,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:46,011 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:46,215 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:46,216 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1717321110, now seen corresponding path program 7 times [2019-11-06 18:48:46,217 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:46,217 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909617987] [2019-11-06 18:48:46,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:46,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909617987] [2019-11-06 18:48:46,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489024971] [2019-11-06 18:48:46,321 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 [2019-11-06 18:48:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:46,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:48:46,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:46,397 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:46,397 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:48:46,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583869199] [2019-11-06 18:48:46,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:48:46,398 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:46,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:48:46,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:48:46,399 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 12 states. [2019-11-06 18:48:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:46,614 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2019-11-06 18:48:46,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:48:46,615 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-06 18:48:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:46,617 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:48:46,617 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:48:46,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:48:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:48:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 43. [2019-11-06 18:48:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:48:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2019-11-06 18:48:46,624 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 35 [2019-11-06 18:48:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:46,625 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2019-11-06 18:48:46,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:48:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2019-11-06 18:48:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:48:46,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:46,626 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:46,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:46,830 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 443942349, now seen corresponding path program 8 times [2019-11-06 18:48:46,831 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:46,831 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329622687] [2019-11-06 18:48:46,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:46,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329622687] [2019-11-06 18:48:46,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622364876] [2019-11-06 18:48:46,953 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 [2019-11-06 18:48:47,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:47,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:47,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:48:47,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:47,034 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:47,034 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:48:47,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447726546] [2019-11-06 18:48:47,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:48:47,035 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:47,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:48:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:48:47,036 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 13 states. [2019-11-06 18:48:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:47,222 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2019-11-06 18:48:47,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:48:47,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-11-06 18:48:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:47,224 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:48:47,224 INFO L226 Difference]: Without dead ends: 93 [2019-11-06 18:48:47,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:48:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-06 18:48:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2019-11-06 18:48:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:48:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-11-06 18:48:47,231 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 38 [2019-11-06 18:48:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:47,232 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-11-06 18:48:47,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:48:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-11-06 18:48:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:48:47,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:47,233 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:47,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:47,438 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash 788915082, now seen corresponding path program 9 times [2019-11-06 18:48:47,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:47,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136521768] [2019-11-06 18:48:47,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:47,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136521768] [2019-11-06 18:48:47,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270682380] [2019-11-06 18:48:47,560 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 [2019-11-06 18:48:48,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 18:48:48,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:48,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:48:48,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:48,115 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:48,115 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:48:48,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432633541] [2019-11-06 18:48:48,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:48:48,116 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:48,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:48:48,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:48,119 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 14 states. [2019-11-06 18:48:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:48,351 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2019-11-06 18:48:48,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:48:48,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-11-06 18:48:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:48,353 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:48:48,353 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:48:48,354 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:48:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 49. [2019-11-06 18:48:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:48:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2019-11-06 18:48:48,361 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 41 [2019-11-06 18:48:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:48,361 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2019-11-06 18:48:48,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:48:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2019-11-06 18:48:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:48:48,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:48,363 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:48,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:48,569 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash 14864557, now seen corresponding path program 10 times [2019-11-06 18:48:48,569 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:48,570 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526214722] [2019-11-06 18:48:48,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:48,714 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526214722] [2019-11-06 18:48:48,714 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913058140] [2019-11-06 18:48:48,714 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 [2019-11-06 18:48:48,789 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:48,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:48,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:48:48,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:48,818 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:48,818 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:48:48,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020385415] [2019-11-06 18:48:48,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:48:48,819 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:48,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:48:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:48,820 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 15 states. [2019-11-06 18:48:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:49,105 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2019-11-06 18:48:49,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:48:49,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2019-11-06 18:48:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:49,107 INFO L225 Difference]: With dead ends: 121 [2019-11-06 18:48:49,107 INFO L226 Difference]: Without dead ends: 109 [2019-11-06 18:48:49,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-06 18:48:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 52. [2019-11-06 18:48:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:48:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2019-11-06 18:48:49,115 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 44 [2019-11-06 18:48:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:49,116 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2019-11-06 18:48:49,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:48:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2019-11-06 18:48:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:48:49,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:49,117 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:49,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:49,321 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:49,322 INFO L82 PathProgramCache]: Analyzing trace with hash -44913494, now seen corresponding path program 11 times [2019-11-06 18:48:49,322 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:49,322 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340144589] [2019-11-06 18:48:49,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:49,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340144589] [2019-11-06 18:48:49,505 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141176669] [2019-11-06 18:48:49,505 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 [2019-11-06 18:48:51,532 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:48:51,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:51,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:48:51,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:51,558 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:51,559 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:48:51,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321103342] [2019-11-06 18:48:51,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:48:51,560 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:48:51,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:48:51,560 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 16 states. [2019-11-06 18:48:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:51,821 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2019-11-06 18:48:51,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:48:51,821 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2019-11-06 18:48:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:51,823 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:48:51,823 INFO L226 Difference]: Without dead ends: 117 [2019-11-06 18:48:51,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:48:51,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-06 18:48:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2019-11-06 18:48:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:48:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2019-11-06 18:48:51,830 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 47 [2019-11-06 18:48:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:51,830 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2019-11-06 18:48:51,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:48:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2019-11-06 18:48:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:48:51,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:51,832 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:52,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:52,045 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:52,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1518597005, now seen corresponding path program 12 times [2019-11-06 18:48:52,046 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:52,046 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525894360] [2019-11-06 18:48:52,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:52,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525894360] [2019-11-06 18:48:52,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310226428] [2019-11-06 18:48:52,228 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 [2019-11-06 18:48:53,056 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:48:53,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:53,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:48:53,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:53,088 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:53,088 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-11-06 18:48:53,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613175544] [2019-11-06 18:48:53,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:48:53,089 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:53,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:48:53,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:48:53,090 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 17 states. [2019-11-06 18:48:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:53,405 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2019-11-06 18:48:53,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:48:53,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-11-06 18:48:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:53,407 INFO L225 Difference]: With dead ends: 137 [2019-11-06 18:48:53,407 INFO L226 Difference]: Without dead ends: 125 [2019-11-06 18:48:53,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:48:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-06 18:48:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 58. [2019-11-06 18:48:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:48:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2019-11-06 18:48:53,420 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 50 [2019-11-06 18:48:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:53,421 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2019-11-06 18:48:53,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:48:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2019-11-06 18:48:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:48:53,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:53,424 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:53,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:53,625 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:53,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1139547594, now seen corresponding path program 13 times [2019-11-06 18:48:53,626 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:53,626 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128315505] [2019-11-06 18:48:53,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:53,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128315505] [2019-11-06 18:48:53,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394221806] [2019-11-06 18:48:53,827 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 [2019-11-06 18:48:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:53,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:48:53,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:53,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:53,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:48:53,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816328548] [2019-11-06 18:48:53,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:48:53,935 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:53,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:48:53,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:48:53,936 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 18 states. [2019-11-06 18:48:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:54,231 INFO L93 Difference]: Finished difference Result 145 states and 192 transitions. [2019-11-06 18:48:54,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:48:54,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2019-11-06 18:48:54,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:54,233 INFO L225 Difference]: With dead ends: 145 [2019-11-06 18:48:54,233 INFO L226 Difference]: Without dead ends: 133 [2019-11-06 18:48:54,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:48:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-06 18:48:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2019-11-06 18:48:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:48:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-11-06 18:48:54,245 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 53 [2019-11-06 18:48:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:54,245 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-11-06 18:48:54,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:48:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-11-06 18:48:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:48:54,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:54,248 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:54,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:54,452 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 347565677, now seen corresponding path program 14 times [2019-11-06 18:48:54,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:54,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715534879] [2019-11-06 18:48:54,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:54,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715534879] [2019-11-06 18:48:54,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148443952] [2019-11-06 18:48:54,653 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 [2019-11-06 18:48:54,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:54,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:54,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:48:54,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:54,736 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:54,736 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:48:54,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707818302] [2019-11-06 18:48:54,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:48:54,737 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:54,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:48:54,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:48:54,738 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 19 states. [2019-11-06 18:48:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:55,047 INFO L93 Difference]: Finished difference Result 153 states and 203 transitions. [2019-11-06 18:48:55,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:48:55,047 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2019-11-06 18:48:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:55,049 INFO L225 Difference]: With dead ends: 153 [2019-11-06 18:48:55,049 INFO L226 Difference]: Without dead ends: 141 [2019-11-06 18:48:55,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:48:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-06 18:48:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 64. [2019-11-06 18:48:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:48:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2019-11-06 18:48:55,055 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 56 [2019-11-06 18:48:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:55,056 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2019-11-06 18:48:55,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:48:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2019-11-06 18:48:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 18:48:55,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:55,057 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:55,261 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:55,261 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1330366742, now seen corresponding path program 15 times [2019-11-06 18:48:55,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:55,262 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996029460] [2019-11-06 18:48:55,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:55,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996029460] [2019-11-06 18:48:55,471 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463659139] [2019-11-06 18:48:55,471 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 [2019-11-06 18:48:58,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-06 18:48:58,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:58,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:48:58,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:58,686 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:58,686 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-06 18:48:58,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743705525] [2019-11-06 18:48:58,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:48:58,687 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:58,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:48:58,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:58,688 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 20 states. [2019-11-06 18:48:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:59,043 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2019-11-06 18:48:59,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:48:59,044 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2019-11-06 18:48:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:59,045 INFO L225 Difference]: With dead ends: 161 [2019-11-06 18:48:59,045 INFO L226 Difference]: Without dead ends: 149 [2019-11-06 18:48:59,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:59,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-06 18:48:59,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2019-11-06 18:48:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:48:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2019-11-06 18:48:59,052 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 59 [2019-11-06 18:48:59,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:59,052 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2019-11-06 18:48:59,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:48:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2019-11-06 18:48:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 18:48:59,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:59,053 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:59,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:59,259 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:59,259 INFO L82 PathProgramCache]: Analyzing trace with hash 509296973, now seen corresponding path program 16 times [2019-11-06 18:48:59,259 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:59,260 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606234808] [2019-11-06 18:48:59,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:59,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606234808] [2019-11-06 18:48:59,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877765924] [2019-11-06 18:48:59,447 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 [2019-11-06 18:48:59,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:59,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:59,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:48:59,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:59,533 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:59,533 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:48:59,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061824455] [2019-11-06 18:48:59,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:48:59,534 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:59,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:48:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:48:59,535 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 21 states. [2019-11-06 18:48:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:59,865 INFO L93 Difference]: Finished difference Result 169 states and 225 transitions. [2019-11-06 18:48:59,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:48:59,866 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 62 [2019-11-06 18:48:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:59,867 INFO L225 Difference]: With dead ends: 169 [2019-11-06 18:48:59,867 INFO L226 Difference]: Without dead ends: 157 [2019-11-06 18:48:59,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:48:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-06 18:48:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 70. [2019-11-06 18:48:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:48:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2019-11-06 18:48:59,874 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 62 [2019-11-06 18:48:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:59,874 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2019-11-06 18:48:59,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:48:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2019-11-06 18:48:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:48:59,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:59,875 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:00,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:00,079 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:00,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2146633718, now seen corresponding path program 17 times [2019-11-06 18:49:00,080 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:00,080 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451075120] [2019-11-06 18:49:00,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:00,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451075120] [2019-11-06 18:49:00,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776938227] [2019-11-06 18:49:00,327 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 [2019-11-06 18:49:22,781 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-06 18:49:22,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:22,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:49:22,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:22,820 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:22,820 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-11-06 18:49:22,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637193355] [2019-11-06 18:49:22,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:49:22,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:49:22,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:49:22,823 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 22 states. [2019-11-06 18:49:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:23,225 INFO L93 Difference]: Finished difference Result 177 states and 236 transitions. [2019-11-06 18:49:23,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:49:23,225 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2019-11-06 18:49:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:23,228 INFO L225 Difference]: With dead ends: 177 [2019-11-06 18:49:23,229 INFO L226 Difference]: Without dead ends: 165 [2019-11-06 18:49:23,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:49:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-06 18:49:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 73. [2019-11-06 18:49:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:49:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2019-11-06 18:49:23,239 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 65 [2019-11-06 18:49:23,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:23,241 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2019-11-06 18:49:23,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:49:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2019-11-06 18:49:23,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 18:49:23,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:23,242 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:23,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:23,443 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:23,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1204644909, now seen corresponding path program 18 times [2019-11-06 18:49:23,443 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:23,443 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838098263] [2019-11-06 18:49:23,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:23,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838098263] [2019-11-06 18:49:23,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494792585] [2019-11-06 18:49:23,686 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