/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:41:29,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:41:29,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:41:29,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:41:29,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:41:29,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:41:29,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:41:29,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:41:29,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:41:29,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:41:29,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:41:29,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:41:29,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:41:29,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:41:29,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:41:29,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:41:29,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:41:29,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:41:29,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:41:29,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:41:29,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:41:29,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:41:29,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:41:29,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:41:29,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:41:29,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:41:29,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:41:29,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:41:29,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:41:29,998 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:41:29,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:41:30,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:41:30,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:41:30,003 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:41:30,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:41:30,004 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:41:30,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:41:30,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:41:30,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:41:30,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:41:30,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:41:30,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:41:30,006 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:41:30,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:41:30,007 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:41:30,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:41:30,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:41:30,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:41:30,007 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:41:30,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:41:30,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:41:30,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:41:30,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:41:30,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:41:30,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:41:30,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:41:30,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:41:30,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:41:30,275 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:41:30,298 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:41:30,302 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:41:30,303 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:41:30,304 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:41:30,305 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2019-11-06 18:41:30,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f92f462/88513dd89be841d9b456a85196695ca6/FLAG6140c64b8 [2019-11-06 18:41:30,825 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:41:30,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-1.i [2019-11-06 18:41:30,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f92f462/88513dd89be841d9b456a85196695ca6/FLAG6140c64b8 [2019-11-06 18:41:31,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f92f462/88513dd89be841d9b456a85196695ca6 [2019-11-06 18:41:31,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:41:31,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:41:31,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:31,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:41:31,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:41:31,228 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2109e484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31, skipping insertion in model container [2019-11-06 18:41:31,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,239 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:41:31,258 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:41:31,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:31,434 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:41:31,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:41:31,482 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:41:31,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31 WrapperNode [2019-11-06 18:41:31,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:41:31,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:41:31,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:41:31,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:41:31,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (1/1) ... [2019-11-06 18:41:31,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:41:31,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:41:31,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:41:31,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:41:31,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:41:31,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:41:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:41:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:41:31,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:41:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:41:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:41:31,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:41:31,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:41:31,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:41:31,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:41:32,065 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:41:32,066 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-06 18:41:32,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:32 BoogieIcfgContainer [2019-11-06 18:41:32,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:41:32,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:41:32,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:41:32,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:41:32,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:41:31" (1/3) ... [2019-11-06 18:41:32,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43417118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:32, skipping insertion in model container [2019-11-06 18:41:32,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:31" (2/3) ... [2019-11-06 18:41:32,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43417118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:41:32, skipping insertion in model container [2019-11-06 18:41:32,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:41:32" (3/3) ... [2019-11-06 18:41:32,076 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-1.i [2019-11-06 18:41:32,086 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:41:32,094 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:41:32,105 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:41:32,130 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:41:32,130 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:41:32,130 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:41:32,131 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:41:32,131 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:41:32,131 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:41:32,131 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:41:32,131 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:41:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-06 18:41:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:41:32,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:32,154 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:32,156 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash -2095174276, now seen corresponding path program 1 times [2019-11-06 18:41:32,172 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:32,172 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705566065] [2019-11-06 18:41:32,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:41:32,351 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705566065] [2019-11-06 18:41:32,352 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:32,353 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:41:32,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205939947] [2019-11-06 18:41:32,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:41:32,359 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:32,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:41:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:41:32,378 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-06 18:41:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:32,586 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-11-06 18:41:32,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:41:32,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-06 18:41:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:32,602 INFO L225 Difference]: With dead ends: 70 [2019-11-06 18:41:32,603 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:41:32,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:41:32,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:41:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 18:41:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:41:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-06 18:41:32,666 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-11-06 18:41:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:32,668 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-06 18:41:32,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:41:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-06 18:41:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:41:32,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:32,671 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:32,672 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1625097866, now seen corresponding path program 1 times [2019-11-06 18:41:32,673 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:32,674 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270254037] [2019-11-06 18:41:32,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:41:32,807 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270254037] [2019-11-06 18:41:32,808 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:32,808 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:32,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830494360] [2019-11-06 18:41:32,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:32,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:32,811 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2019-11-06 18:41:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:32,919 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-11-06 18:41:32,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:32,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:41:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:32,921 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:41:32,921 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:41:32,922 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:41:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:41:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:41:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-11-06 18:41:32,930 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2019-11-06 18:41:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:32,930 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-11-06 18:41:32,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:32,931 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-11-06 18:41:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:41:32,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:32,932 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:32,932 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:32,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:32,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1623092332, now seen corresponding path program 1 times [2019-11-06 18:41:32,933 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:32,933 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242063175] [2019-11-06 18:41:32,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:41:33,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242063175] [2019-11-06 18:41:33,040 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:41:33,040 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:41:33,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519083145] [2019-11-06 18:41:33,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:41:33,041 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:41:33,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:33,043 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2019-11-06 18:41:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:33,218 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2019-11-06 18:41:33,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:41:33,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-06 18:41:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:33,220 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:41:33,220 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:41:33,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:41:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:41:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-11-06 18:41:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:41:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-11-06 18:41:33,236 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2019-11-06 18:41:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:33,236 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-11-06 18:41:33,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:41:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-11-06 18:41:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:41:33,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:33,239 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:33,240 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:33,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1928668694, now seen corresponding path program 1 times [2019-11-06 18:41:33,240 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:33,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272716946] [2019-11-06 18:41:33,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:33,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272716946] [2019-11-06 18:41:33,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654891573] [2019-11-06 18:41:33,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:33,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:33,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:33,496 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:33,496 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:41:33,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707952632] [2019-11-06 18:41:33,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:41:33,497 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:33,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:41:33,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:33,498 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2019-11-06 18:41:33,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:33,608 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-11-06 18:41:33,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:41:33,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-06 18:41:33,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:33,609 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:41:33,609 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:41:33,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:41:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:41:33,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-06 18:41:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:41:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-11-06 18:41:33,618 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2019-11-06 18:41:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:33,619 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-11-06 18:41:33,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:41:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-11-06 18:41:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:41:33,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:33,622 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:33,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:33,824 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:33,824 INFO L82 PathProgramCache]: Analyzing trace with hash 359479048, now seen corresponding path program 2 times [2019-11-06 18:41:33,824 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:33,825 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192712934] [2019-11-06 18:41:33,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:33,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192712934] [2019-11-06 18:41:33,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978275328] [2019-11-06 18:41:33,904 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:33,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:33,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:33,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:41:33,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:33,999 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:34,002 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:41:34,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982515090] [2019-11-06 18:41:34,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:41:34,004 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:34,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:41:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:41:34,005 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2019-11-06 18:41:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:34,111 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2019-11-06 18:41:34,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:41:34,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2019-11-06 18:41:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:34,113 INFO L225 Difference]: With dead ends: 76 [2019-11-06 18:41:34,113 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:41:34,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:41:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:41:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-06 18:41:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:41:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-06 18:41:34,120 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 37 [2019-11-06 18:41:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:34,121 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-06 18:41:34,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:41:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-06 18:41:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:41:34,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:34,122 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:34,326 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:34,326 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:34,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:34,326 INFO L82 PathProgramCache]: Analyzing trace with hash 246203558, now seen corresponding path program 3 times [2019-11-06 18:41:34,327 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:34,327 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286481750] [2019-11-06 18:41:34,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:41:34,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286481750] [2019-11-06 18:41:34,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023323910] [2019-11-06 18:41:34,404 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:34,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:41:34,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:34,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:41:34,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:41:34,502 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:34,502 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:41:34,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667361438] [2019-11-06 18:41:34,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:41:34,504 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:34,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:41:34,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:34,505 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2019-11-06 18:41:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:34,748 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2019-11-06 18:41:34,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:41:34,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-11-06 18:41:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:34,749 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:41:34,751 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 18:41:34,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 18:41:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2019-11-06 18:41:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:41:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-06 18:41:34,768 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 39 [2019-11-06 18:41:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:34,768 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-06 18:41:34,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:41:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-06 18:41:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:41:34,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:34,772 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:34,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:34,976 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash 575548698, now seen corresponding path program 4 times [2019-11-06 18:41:34,977 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:34,977 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570889584] [2019-11-06 18:41:34,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:41:35,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570889584] [2019-11-06 18:41:35,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179309676] [2019-11-06 18:41:35,119 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:35,173 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:35,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:35,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:41:35,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:41:35,194 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:35,194 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:41:35,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928317620] [2019-11-06 18:41:35,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:41:35,195 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:41:35,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:35,196 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 9 states. [2019-11-06 18:41:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:35,289 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2019-11-06 18:41:35,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:41:35,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2019-11-06 18:41:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:35,290 INFO L225 Difference]: With dead ends: 100 [2019-11-06 18:41:35,291 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:41:35,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:41:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:41:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-11-06 18:41:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:41:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-11-06 18:41:35,298 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 51 [2019-11-06 18:41:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:35,298 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-11-06 18:41:35,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:41:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-11-06 18:41:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:41:35,300 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:35,300 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:35,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:35,504 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:35,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash -801206728, now seen corresponding path program 5 times [2019-11-06 18:41:35,504 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:35,505 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281035591] [2019-11-06 18:41:35,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:41:35,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281035591] [2019-11-06 18:41:35,648 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152327486] [2019-11-06 18:41:35,648 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:36,165 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:41:36,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:36,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:41:36,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-06 18:41:36,227 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:36,227 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:41:36,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78085866] [2019-11-06 18:41:36,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:41:36,228 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:36,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:41:36,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:36,229 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 12 states. [2019-11-06 18:41:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:36,431 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2019-11-06 18:41:36,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:41:36,432 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2019-11-06 18:41:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:36,433 INFO L225 Difference]: With dead ends: 117 [2019-11-06 18:41:36,433 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 18:41:36,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 18:41:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2019-11-06 18:41:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-06 18:41:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-06 18:41:36,451 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2019-11-06 18:41:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:36,454 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-06 18:41:36,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:41:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-06 18:41:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:41:36,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:36,459 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:36,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:36,660 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash -371655764, now seen corresponding path program 6 times [2019-11-06 18:41:36,660 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:36,660 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142990981] [2019-11-06 18:41:36,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 18:41:36,784 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142990981] [2019-11-06 18:41:36,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463493636] [2019-11-06 18:41:36,785 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:37,000 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:41:37,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:37,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:41:37,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:41:37,049 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:37,049 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:41:37,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277399232] [2019-11-06 18:41:37,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:41:37,050 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:37,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:41:37,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:41:37,051 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 14 states. [2019-11-06 18:41:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:37,300 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2019-11-06 18:41:37,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:41:37,300 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 65 [2019-11-06 18:41:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:37,302 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:41:37,302 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:41:37,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:41:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:41:37,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2019-11-06 18:41:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:41:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2019-11-06 18:41:37,311 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 65 [2019-11-06 18:41:37,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:37,311 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2019-11-06 18:41:37,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:41:37,311 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2019-11-06 18:41:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 18:41:37,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:37,315 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:37,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:37,516 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash 996125472, now seen corresponding path program 7 times [2019-11-06 18:41:37,517 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:37,517 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678314673] [2019-11-06 18:41:37,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 18:41:37,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678314673] [2019-11-06 18:41:37,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860900282] [2019-11-06 18:41:37,648 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:37,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:41:37,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 18:41:37,755 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:37,756 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:41:37,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859480482] [2019-11-06 18:41:37,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:41:37,757 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:37,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:41:37,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:37,757 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 12 states. [2019-11-06 18:41:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:37,864 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2019-11-06 18:41:37,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:41:37,864 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2019-11-06 18:41:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:37,865 INFO L225 Difference]: With dead ends: 146 [2019-11-06 18:41:37,865 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:41:37,866 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:41:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:41:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-06 18:41:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-06 18:41:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-11-06 18:41:37,873 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 77 [2019-11-06 18:41:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:37,873 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-11-06 18:41:37,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:41:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-11-06 18:41:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-06 18:41:37,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:37,875 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:38,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:38,086 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:38,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:38,087 INFO L82 PathProgramCache]: Analyzing trace with hash -869743938, now seen corresponding path program 8 times [2019-11-06 18:41:38,087 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:38,087 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539245001] [2019-11-06 18:41:38,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 18:41:38,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539245001] [2019-11-06 18:41:38,224 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106192875] [2019-11-06 18:41:38,224 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:38,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:41:38,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:38,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:41:38,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 18:41:38,383 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:38,383 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:41:38,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693102437] [2019-11-06 18:41:38,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:41:38,385 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:38,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:41:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:41:38,386 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 13 states. [2019-11-06 18:41:38,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:38,504 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2019-11-06 18:41:38,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:41:38,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2019-11-06 18:41:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:38,505 INFO L225 Difference]: With dead ends: 148 [2019-11-06 18:41:38,506 INFO L226 Difference]: Without dead ends: 87 [2019-11-06 18:41:38,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:41:38,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-06 18:41:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-06 18:41:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 18:41:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2019-11-06 18:41:38,518 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 79 [2019-11-06 18:41:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:38,518 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2019-11-06 18:41:38,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:41:38,522 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2019-11-06 18:41:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:41:38,523 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:38,523 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:38,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:38,740 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:38,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1326082780, now seen corresponding path program 9 times [2019-11-06 18:41:38,741 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:38,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987950772] [2019-11-06 18:41:38,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-06 18:41:38,881 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987950772] [2019-11-06 18:41:38,881 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837347004] [2019-11-06 18:41:38,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:39,337 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 18:41:39,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:39,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:41:39,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-06 18:41:39,425 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:39,425 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-11-06 18:41:39,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600391876] [2019-11-06 18:41:39,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:41:39,427 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:41:39,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:41:39,428 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 18 states. [2019-11-06 18:41:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:39,758 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2019-11-06 18:41:39,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:41:39,758 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-06 18:41:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:39,759 INFO L225 Difference]: With dead ends: 165 [2019-11-06 18:41:39,759 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 18:41:39,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:41:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 18:41:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2019-11-06 18:41:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-06 18:41:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-11-06 18:41:39,767 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 81 [2019-11-06 18:41:39,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:39,767 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-11-06 18:41:39,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:41:39,767 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-11-06 18:41:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 18:41:39,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:39,769 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:39,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:39,974 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:39,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1218403760, now seen corresponding path program 10 times [2019-11-06 18:41:39,975 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:39,975 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463262896] [2019-11-06 18:41:39,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-06 18:41:40,160 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463262896] [2019-11-06 18:41:40,160 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450307611] [2019-11-06 18:41:40,160 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:40,238 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:41:40,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:41:40,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:41:40,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:41:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-06 18:41:40,271 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:41:40,271 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:41:40,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129664474] [2019-11-06 18:41:40,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:41:40,273 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:41:40,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:41:40,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:41:40,274 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 15 states. [2019-11-06 18:41:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:41:40,388 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2019-11-06 18:41:40,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:41:40,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 93 [2019-11-06 18:41:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:41:40,390 INFO L225 Difference]: With dead ends: 172 [2019-11-06 18:41:40,390 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:41:40,391 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:41:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:41:40,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2019-11-06 18:41:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-06 18:41:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2019-11-06 18:41:40,410 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 93 [2019-11-06 18:41:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:41:40,410 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2019-11-06 18:41:40,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:41:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2019-11-06 18:41:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 18:41:40,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:41:40,412 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:41:40,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:41:40,615 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:41:40,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:41:40,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1577927186, now seen corresponding path program 11 times [2019-11-06 18:41:40,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:41:40,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821867997] [2019-11-06 18:41:40,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:41:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:41:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-06 18:41:40,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821867997] [2019-11-06 18:41:40,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547520376] [2019-11-06 18:41:40,800 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