java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:07,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:07,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:07,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:07,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:07,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:07,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:07,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:07,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:07,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:07,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:07,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:07,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:07,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:07,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:07,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:07,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:07,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:07,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:07,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:07,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:07,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:07,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:07,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:07,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:47:07,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:07,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:07,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:07,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:47:07,836 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:07,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:07,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:07,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:07,841 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:07,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:07,841 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:07,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:07,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:07,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:07,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:07,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:07,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:07,844 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:07,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:07,844 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:07,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:07,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:07,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:07,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:07,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:07,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:07,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:07,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:07,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:07,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:07,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:07,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:07,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:08,126 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:08,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:08,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:08,148 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:08,148 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:08,149 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i [2019-10-14 21:47:08,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cde51677/bdf1e52dba6346fba2234c797bd9a5cd/FLAG2bec66e3c [2019-10-14 21:47:08,701 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:08,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i [2019-10-14 21:47:08,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cde51677/bdf1e52dba6346fba2234c797bd9a5cd/FLAG2bec66e3c [2019-10-14 21:47:09,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cde51677/bdf1e52dba6346fba2234c797bd9a5cd [2019-10-14 21:47:09,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:09,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:09,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:09,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:09,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:09,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb457ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09, skipping insertion in model container [2019-10-14 21:47:09,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,102 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:09,123 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:09,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:09,354 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:09,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:09,396 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:09,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09 WrapperNode [2019-10-14 21:47:09,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:09,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:09,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:09,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:09,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (1/1) ... [2019-10-14 21:47:09,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:09,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:09,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:09,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:09,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:09,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:09,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:09,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:47:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:09,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:09,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:09,874 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:09,875 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:47:09,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:09 BoogieIcfgContainer [2019-10-14 21:47:09,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:09,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:09,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:09,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:09,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:09" (1/3) ... [2019-10-14 21:47:09,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce01ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:09, skipping insertion in model container [2019-10-14 21:47:09,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:09" (2/3) ... [2019-10-14 21:47:09,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce01ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:09, skipping insertion in model container [2019-10-14 21:47:09,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:09" (3/3) ... [2019-10-14 21:47:09,884 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_vector_difference_ground.i [2019-10-14 21:47:09,894 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:09,901 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:09,913 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:09,938 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:09,938 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:09,938 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:09,939 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:09,939 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:09,939 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:09,939 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:09,939 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-14 21:47:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:47:09,963 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:09,964 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:09,966 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:09,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1498727252, now seen corresponding path program 1 times [2019-10-14 21:47:09,981 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:09,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902737464] [2019-10-14 21:47:09,981 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:09,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:09,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:10,154 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902737464] [2019-10-14 21:47:10,155 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:10,155 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:10,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662990992] [2019-10-14 21:47:10,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:10,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:10,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:10,179 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-14 21:47:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:10,287 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2019-10-14 21:47:10,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:10,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:47:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:10,298 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:47:10,299 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 21:47:10,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 21:47:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 21:47:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:47:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 21:47:10,345 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2019-10-14 21:47:10,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:10,345 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 21:47:10,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 21:47:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:47:10,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:10,347 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:10,347 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:10,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:10,348 INFO L82 PathProgramCache]: Analyzing trace with hash 756064934, now seen corresponding path program 1 times [2019-10-14 21:47:10,348 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:10,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913587755] [2019-10-14 21:47:10,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:10,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:10,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:10,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913587755] [2019-10-14 21:47:10,429 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:10,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:10,430 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229411279] [2019-10-14 21:47:10,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:10,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:10,433 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2019-10-14 21:47:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:10,528 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-10-14 21:47:10,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:10,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:47:10,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:10,530 INFO L225 Difference]: With dead ends: 37 [2019-10-14 21:47:10,530 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:47:10,531 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:10,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:47:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 21:47:10,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:47:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 21:47:10,539 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-14 21:47:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:10,539 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 21:47:10,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 21:47:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:47:10,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:10,541 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:10,541 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:10,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:10,542 INFO L82 PathProgramCache]: Analyzing trace with hash 434016106, now seen corresponding path program 1 times [2019-10-14 21:47:10,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:10,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737314234] [2019-10-14 21:47:10,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:10,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:10,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:10,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737314234] [2019-10-14 21:47:10,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038454510] [2019-10-14 21:47:10,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:10,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:10,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:47:10,763 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:10,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:47:10,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172705965] [2019-10-14 21:47:10,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:47:10,772 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:47:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:10,774 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2019-10-14 21:47:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:10,883 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-10-14 21:47:10,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:47:10,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-14 21:47:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:10,885 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:47:10,885 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:47:10,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:47:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-14 21:47:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:47:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-14 21:47:10,893 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2019-10-14 21:47:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:10,893 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-14 21:47:10,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:47:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-14 21:47:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:47:10,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:10,895 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:11,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:11,108 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:11,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1099220258, now seen corresponding path program 2 times [2019-10-14 21:47:11,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:11,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444505725] [2019-10-14 21:47:11,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:11,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:11,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:47:11,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444505725] [2019-10-14 21:47:11,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257381340] [2019-10-14 21:47:11,196 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:11,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:11,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:11,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:47:11,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:47:11,278 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:11,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:47:11,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566444475] [2019-10-14 21:47:11,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:47:11,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:11,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:47:11,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:11,280 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2019-10-14 21:47:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:11,386 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-10-14 21:47:11,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:47:11,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-10-14 21:47:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:11,387 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:47:11,387 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:47:11,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:47:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:47:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:47:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 21:47:11,395 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2019-10-14 21:47:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:11,396 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 21:47:11,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:47:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 21:47:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:47:11,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:11,397 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:11,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:11,599 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:11,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1323870958, now seen corresponding path program 3 times [2019-10-14 21:47:11,600 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:11,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486782943] [2019-10-14 21:47:11,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:11,602 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:11,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:47:11,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486782943] [2019-10-14 21:47:11,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461591260] [2019-10-14 21:47:11,713 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:11,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:47:11,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:11,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:11,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:47:11,798 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:11,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:47:11,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257664865] [2019-10-14 21:47:11,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:47:11,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:47:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:11,803 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2019-10-14 21:47:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:11,898 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-10-14 21:47:11,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:47:11,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:47:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:11,900 INFO L225 Difference]: With dead ends: 49 [2019-10-14 21:47:11,900 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:47:11,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:47:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 21:47:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:47:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-14 21:47:11,914 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2019-10-14 21:47:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:11,915 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-14 21:47:11,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:47:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-14 21:47:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:47:11,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:11,918 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:12,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:12,122 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:12,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1351588766, now seen corresponding path program 4 times [2019-10-14 21:47:12,123 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:12,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326117568] [2019-10-14 21:47:12,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:12,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:12,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:47:12,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326117568] [2019-10-14 21:47:12,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838301476] [2019-10-14 21:47:12,284 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:12,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:12,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:12,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:47:12,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:47:12,364 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:12,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:47:12,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626847452] [2019-10-14 21:47:12,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:47:12,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:12,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:47:12,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:47:12,366 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2019-10-14 21:47:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:12,480 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2019-10-14 21:47:12,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:47:12,480 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-14 21:47:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:12,481 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:47:12,481 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:47:12,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:47:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:47:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:47:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:47:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 21:47:12,490 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2019-10-14 21:47:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:12,491 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 21:47:12,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:47:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 21:47:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:47:12,494 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:12,495 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:12,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:12,698 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2074456690, now seen corresponding path program 5 times [2019-10-14 21:47:12,699 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:12,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116816372] [2019-10-14 21:47:12,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:12,701 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:12,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:47:12,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116816372] [2019-10-14 21:47:12,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985898501] [2019-10-14 21:47:12,860 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:13,193 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:47:13,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:13,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:47:13,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:47:13,227 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:13,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:47:13,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177794285] [2019-10-14 21:47:13,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:13,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:13,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:13,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:13,229 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 10 states. [2019-10-14 21:47:13,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:13,361 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2019-10-14 21:47:13,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:47:13,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-10-14 21:47:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:13,362 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:47:13,362 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 21:47:13,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 21:47:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-10-14 21:47:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:47:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-10-14 21:47:13,369 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2019-10-14 21:47:13,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:13,369 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-10-14 21:47:13,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-10-14 21:47:13,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:47:13,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:13,371 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:13,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:13,582 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1266817510, now seen corresponding path program 6 times [2019-10-14 21:47:13,583 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:13,584 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106415970] [2019-10-14 21:47:13,584 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:13,584 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:13,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:47:13,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106415970] [2019-10-14 21:47:13,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344544634] [2019-10-14 21:47:13,694 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:13,900 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:47:13,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:13,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:13,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:47:13,918 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:13,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:47:13,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052674486] [2019-10-14 21:47:13,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:13,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:13,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:13,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:13,920 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 11 states. [2019-10-14 21:47:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:14,044 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-10-14 21:47:14,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:14,045 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-10-14 21:47:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:14,046 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:47:14,046 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:47:14,047 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:47:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:47:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:47:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-14 21:47:14,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2019-10-14 21:47:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:14,052 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-14 21:47:14,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-14 21:47:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:47:14,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:14,054 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:14,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:14,261 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1266096650, now seen corresponding path program 7 times [2019-10-14 21:47:14,262 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:14,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002320145] [2019-10-14 21:47:14,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:14,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:14,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:47:14,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002320145] [2019-10-14 21:47:14,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443133901] [2019-10-14 21:47:14,406 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:14,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:47:14,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:47:14,481 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:14,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:47:14,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374905149] [2019-10-14 21:47:14,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:47:14,485 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:47:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:47:14,485 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 12 states. [2019-10-14 21:47:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:14,588 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-10-14 21:47:14,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:47:14,588 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-10-14 21:47:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:14,589 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:47:14,589 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:47:14,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:47:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:47:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 21:47:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:47:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-10-14 21:47:14,596 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2019-10-14 21:47:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:14,596 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-10-14 21:47:14,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:47:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-10-14 21:47:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:47:14,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:14,597 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:14,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:14,802 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -786668394, now seen corresponding path program 8 times [2019-10-14 21:47:14,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:14,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192446594] [2019-10-14 21:47:14,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:14,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:14,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:47:14,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192446594] [2019-10-14 21:47:14,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014043280] [2019-10-14 21:47:14,993 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:15,053 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:15,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:15,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:47:15,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:47:15,088 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:15,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:47:15,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910342536] [2019-10-14 21:47:15,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:47:15,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:15,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:47:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:47:15,090 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 13 states. [2019-10-14 21:47:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:15,207 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-10-14 21:47:15,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:47:15,207 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-10-14 21:47:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:15,208 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:47:15,208 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:47:15,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:47:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:47:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 21:47:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:47:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2019-10-14 21:47:15,215 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 39 [2019-10-14 21:47:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:15,215 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2019-10-14 21:47:15,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:47:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2019-10-14 21:47:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:47:15,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:15,216 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:15,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:15,421 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:15,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1232763526, now seen corresponding path program 9 times [2019-10-14 21:47:15,422 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:15,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896977956] [2019-10-14 21:47:15,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:15,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:15,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 21:47:15,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896977956] [2019-10-14 21:47:15,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421330669] [2019-10-14 21:47:15,562 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:15,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:47:15,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:15,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:15,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:47:15,951 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:15,951 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:47:15,952 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776004510] [2019-10-14 21:47:15,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:15,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:15,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:15,953 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 14 states. [2019-10-14 21:47:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:16,096 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-10-14 21:47:16,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:47:16,096 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-10-14 21:47:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:16,097 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:47:16,097 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:47:16,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:47:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-10-14 21:47:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:47:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-10-14 21:47:16,104 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 42 [2019-10-14 21:47:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:16,104 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-10-14 21:47:16,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-10-14 21:47:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:47:16,105 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:16,105 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:16,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:16,306 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1346906350, now seen corresponding path program 10 times [2019-10-14 21:47:16,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:16,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115054460] [2019-10-14 21:47:16,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:16,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:16,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:16,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115054460] [2019-10-14 21:47:16,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221284027] [2019-10-14 21:47:16,467 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:16,540 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:16,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:16,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:47:16,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:16,591 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:16,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:47:16,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187455012] [2019-10-14 21:47:16,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:47:16,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:47:16,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:16,594 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2019-10-14 21:47:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:16,762 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2019-10-14 21:47:16,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:16,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2019-10-14 21:47:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:16,765 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:47:16,766 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:47:16,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:47:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-14 21:47:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:47:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-10-14 21:47:16,777 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 45 [2019-10-14 21:47:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:16,778 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-10-14 21:47:16,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:47:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-10-14 21:47:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:47:16,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:16,783 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:16,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:16,989 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1259262206, now seen corresponding path program 11 times [2019-10-14 21:47:16,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:16,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075619638] [2019-10-14 21:47:16,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:16,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:16,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:47:17,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075619638] [2019-10-14 21:47:17,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403241934] [2019-10-14 21:47:17,181 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:50,522 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:47:50,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:50,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:47:50,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:47:50,576 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:50,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:47:50,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310514869] [2019-10-14 21:47:50,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:47:50,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:50,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:47:50,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:50,578 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2019-10-14 21:47:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:50,723 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2019-10-14 21:47:50,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:47:50,723 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2019-10-14 21:47:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:50,725 INFO L225 Difference]: With dead ends: 81 [2019-10-14 21:47:50,725 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:47:50,726 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:47:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-10-14 21:47:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:47:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-10-14 21:47:50,732 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 48 [2019-10-14 21:47:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:50,732 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-10-14 21:47:50,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:47:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-10-14 21:47:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:47:50,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:50,734 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:50,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:50,943 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1692598898, now seen corresponding path program 12 times [2019-10-14 21:47:50,945 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:50,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886974861] [2019-10-14 21:47:50,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-14 21:47:51,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886974861] [2019-10-14 21:47:51,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42776475] [2019-10-14 21:47:51,111 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