/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:28:19,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:28:19,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:28:19,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:28:19,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:28:19,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:28:19,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:28:19,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:28:19,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:28:19,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:28:19,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:28:19,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:28:19,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:28:19,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:28:19,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:28:19,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:28:19,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:28:19,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:28:19,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:28:19,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:28:19,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:28:19,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:28:19,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:28:19,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:28:19,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:28:19,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:28:19,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:28:19,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:28:19,156 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 [2019-11-23 22:28:19,170 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:28:19,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:28:19,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:28:19,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:28:19,172 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:28:19,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:28:19,172 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:28:19,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:28:19,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:28:19,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:28:19,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:28:19,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:28:19,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:28:19,174 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:28:19,174 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:28:19,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:28:19,174 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:28:19,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:28:19,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:28:19,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:28:19,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:28:19,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:28:19,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:28:19,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:28:19,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:28:19,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:28:19,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:28:19,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:28:19,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:28:19,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:28:19,453 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:28:19,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:28:19,479 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:28:19,481 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:28:19,481 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:28:19,482 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-11-23 22:28:19,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4826ec655/018bacf751e14a22893ebc7d808d23f2/FLAG50dfc35e9 [2019-11-23 22:28:20,007 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:28:20,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-11-23 22:28:20,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4826ec655/018bacf751e14a22893ebc7d808d23f2/FLAG50dfc35e9 [2019-11-23 22:28:20,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4826ec655/018bacf751e14a22893ebc7d808d23f2 [2019-11-23 22:28:20,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:28:20,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:28:20,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:28:20,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:28:20,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:28:20,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4128cd2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20, skipping insertion in model container [2019-11-23 22:28:20,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:28:20,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:28:20,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:28:20,640 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:28:20,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:28:20,679 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:28:20,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20 WrapperNode [2019-11-23 22:28:20,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:28:20,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:28:20,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:28:20,681 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:28:20,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:28:20,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:28:20,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:28:20,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:28:20,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (1/1) ... [2019-11-23 22:28:20,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:28:20,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:28:20,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:28:20,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:28:20,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (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 [2019-11-23 22:28:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:28:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:28:20,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:28:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:28:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:28:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:28:21,269 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:28:21,269 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:28:21,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:21 BoogieIcfgContainer [2019-11-23 22:28:21,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:28:21,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:28:21,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:28:21,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:28:21,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:28:20" (1/3) ... [2019-11-23 22:28:21,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba23a64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:21, skipping insertion in model container [2019-11-23 22:28:21,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:20" (2/3) ... [2019-11-23 22:28:21,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba23a64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:21, skipping insertion in model container [2019-11-23 22:28:21,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:21" (3/3) ... [2019-11-23 22:28:21,281 INFO L109 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2019-11-23 22:28:21,289 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:28:21,296 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:28:21,306 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:28:21,327 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:28:21,327 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:28:21,327 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:28:21,327 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:28:21,328 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:28:21,328 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:28:21,328 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:28:21,328 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:28:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 22:28:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:28:21,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:21,347 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:21,348 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash -23080620, now seen corresponding path program 1 times [2019-11-23 22:28:21,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:21,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476821330] [2019-11-23 22:28:21,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:28:21,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476821330] [2019-11-23 22:28:21,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:21,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:28:21,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71918666] [2019-11-23 22:28:21,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:28:21,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:21,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:28:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:28:21,503 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-23 22:28:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:21,520 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2019-11-23 22:28:21,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:28:21,522 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-23 22:28:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:21,532 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:28:21,532 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:28:21,536 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:28:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:28:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:28:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:28:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 22:28:21,570 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2019-11-23 22:28:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:21,571 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 22:28:21,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:28:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 22:28:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:28:21,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:21,573 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:21,573 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:21,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1060874985, now seen corresponding path program 1 times [2019-11-23 22:28:21,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:21,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826425287] [2019-11-23 22:28:21,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:28:21,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826425287] [2019-11-23 22:28:21,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:21,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:28:21,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576628228] [2019-11-23 22:28:21,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:28:21,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:28:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:21,633 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 3 states. [2019-11-23 22:28:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:21,653 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-11-23 22:28:21,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:28:21,654 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:28:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:21,655 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:28:21,655 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:28:21,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:28:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:28:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:28:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2019-11-23 22:28:21,662 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2019-11-23 22:28:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:21,662 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2019-11-23 22:28:21,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:28:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2019-11-23 22:28:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:28:21,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:21,664 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:21,664 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -507200985, now seen corresponding path program 1 times [2019-11-23 22:28:21,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:21,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707281155] [2019-11-23 22:28:21,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:28:21,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707281155] [2019-11-23 22:28:21,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:21,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:28:21,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391359233] [2019-11-23 22:28:21,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:28:21,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:21,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:28:21,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:21,726 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 3 states. [2019-11-23 22:28:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:21,785 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-23 22:28:21,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:28:21,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:28:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:21,787 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:28:21,787 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:28:21,788 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:28:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-11-23 22:28:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:28:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-23 22:28:21,795 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2019-11-23 22:28:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:21,796 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-23 22:28:21,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:28:21,796 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-23 22:28:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:28:21,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:21,797 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] [2019-11-23 22:28:21,798 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1833868074, now seen corresponding path program 1 times [2019-11-23 22:28:21,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:21,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678436641] [2019-11-23 22:28:21,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:21,915 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678436641] [2019-11-23 22:28:21,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:21,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:28:21,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258427944] [2019-11-23 22:28:21,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:28:21,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:21,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:28:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:21,919 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2019-11-23 22:28:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:21,955 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-11-23 22:28:21,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:28:21,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-23 22:28:21,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:21,956 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:28:21,957 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:28:21,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:28:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 22:28:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:28:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-23 22:28:21,969 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2019-11-23 22:28:21,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:21,969 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-23 22:28:21,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:28:21,969 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-23 22:28:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:28:21,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:21,973 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] [2019-11-23 22:28:21,973 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:21,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1777663060, now seen corresponding path program 1 times [2019-11-23 22:28:21,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:21,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202785038] [2019-11-23 22:28:21,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:22,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202785038] [2019-11-23 22:28:22,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552454169] [2019-11-23 22:28:22,081 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 [2019-11-23 22:28:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:22,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:28:22,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:22,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:22,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:28:22,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252745735] [2019-11-23 22:28:22,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:28:22,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:28:22,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:28:22,193 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 5 states. [2019-11-23 22:28:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:22,222 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-11-23 22:28:22,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:28:22,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-23 22:28:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:22,224 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:28:22,224 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:28:22,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:28:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:28:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 22:28:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:28:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-23 22:28:22,233 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2019-11-23 22:28:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:22,234 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-23 22:28:22,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:28:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-23 22:28:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:28:22,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:22,236 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] [2019-11-23 22:28:22,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:22,439 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:22,440 INFO L82 PathProgramCache]: Analyzing trace with hash -861329106, now seen corresponding path program 2 times [2019-11-23 22:28:22,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:22,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494061556] [2019-11-23 22:28:22,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:22,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494061556] [2019-11-23 22:28:22,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861604847] [2019-11-23 22:28:22,556 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 [2019-11-23 22:28:22,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:22,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:22,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:22,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:22,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:22,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:28:22,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139847577] [2019-11-23 22:28:22,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:28:22,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:28:22,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:22,671 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2019-11-23 22:28:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:22,709 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2019-11-23 22:28:22,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:28:22,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-11-23 22:28:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:22,712 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:28:22,712 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:28:22,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:28:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-23 22:28:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:28:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2019-11-23 22:28:22,723 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 32 [2019-11-23 22:28:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:22,724 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2019-11-23 22:28:22,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:28:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2019-11-23 22:28:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:28:22,729 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:22,729 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] [2019-11-23 22:28:22,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:22,930 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash -732694992, now seen corresponding path program 3 times [2019-11-23 22:28:22,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:22,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169559722] [2019-11-23 22:28:22,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:28:23,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169559722] [2019-11-23 22:28:23,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53368671] [2019-11-23 22:28:23,034 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 [2019-11-23 22:28:23,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:28:23,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:23,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:28:23,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:28:23,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:23,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:28:23,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099220657] [2019-11-23 22:28:23,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:28:23,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:23,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:28:23,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:23,119 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 8 states. [2019-11-23 22:28:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:23,204 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2019-11-23 22:28:23,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:28:23,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2019-11-23 22:28:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:23,206 INFO L225 Difference]: With dead ends: 79 [2019-11-23 22:28:23,206 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:28:23,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:28:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2019-11-23 22:28:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 22:28:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-11-23 22:28:23,213 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 34 [2019-11-23 22:28:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:23,213 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-11-23 22:28:23,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:28:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-11-23 22:28:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 22:28:23,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:23,215 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-11-23 22:28:23,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:23,419 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1535236799, now seen corresponding path program 4 times [2019-11-23 22:28:23,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:23,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507468557] [2019-11-23 22:28:23,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:28:23,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507468557] [2019-11-23 22:28:23,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133087951] [2019-11-23 22:28:23,509 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 [2019-11-23 22:28:23,583 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:23,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:23,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:23,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 22:28:23,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:23,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:28:23,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012610052] [2019-11-23 22:28:23,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:28:23,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:28:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:23,625 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 10 states. [2019-11-23 22:28:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:23,725 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2019-11-23 22:28:23,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:23,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-23 22:28:23,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:23,728 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:28:23,729 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:28:23,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:28:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2019-11-23 22:28:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:28:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2019-11-23 22:28:23,741 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 45 [2019-11-23 22:28:23,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:23,742 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2019-11-23 22:28:23,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:28:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2019-11-23 22:28:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:28:23,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:23,745 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-11-23 22:28:23,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:23,956 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash -326050476, now seen corresponding path program 5 times [2019-11-23 22:28:23,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:23,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747572581] [2019-11-23 22:28:23,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 22:28:24,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747572581] [2019-11-23 22:28:24,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937822381] [2019-11-23 22:28:24,132 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 [2019-11-23 22:28:24,244 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:28:24,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:24,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:28:24,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 22:28:24,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:24,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:28:24,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960394457] [2019-11-23 22:28:24,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:28:24,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:24,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:28:24,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:24,310 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 12 states. [2019-11-23 22:28:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:24,437 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2019-11-23 22:28:24,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:28:24,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2019-11-23 22:28:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:24,439 INFO L225 Difference]: With dead ends: 119 [2019-11-23 22:28:24,439 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:28:24,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:28:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2019-11-23 22:28:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 22:28:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2019-11-23 22:28:24,450 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 56 [2019-11-23 22:28:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:24,450 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2019-11-23 22:28:24,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:28:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2019-11-23 22:28:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:28:24,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:24,452 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 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] [2019-11-23 22:28:24,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:24,664 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 54449435, now seen corresponding path program 6 times [2019-11-23 22:28:24,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:24,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852430086] [2019-11-23 22:28:24,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 22:28:24,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852430086] [2019-11-23 22:28:24,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003104556] [2019-11-23 22:28:24,800 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 [2019-11-23 22:28:24,875 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 22:28:24,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:24,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:28:24,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 22:28:24,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:24,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2019-11-23 22:28:24,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139883475] [2019-11-23 22:28:24,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:24,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:24,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:24,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:24,913 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 11 states. [2019-11-23 22:28:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:24,970 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2019-11-23 22:28:24,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:28:24,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2019-11-23 22:28:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:24,972 INFO L225 Difference]: With dead ends: 127 [2019-11-23 22:28:24,972 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:28:24,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:28:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-11-23 22:28:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:28:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2019-11-23 22:28:24,979 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 67 [2019-11-23 22:28:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:24,980 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2019-11-23 22:28:24,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2019-11-23 22:28:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:28:24,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:24,981 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:25,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,186 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2069670231, now seen corresponding path program 7 times [2019-11-23 22:28:25,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:25,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909424168] [2019-11-23 22:28:25,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:28:25,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909424168] [2019-11-23 22:28:25,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932050008] [2019-11-23 22:28:25,303 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 [2019-11-23 22:28:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:25,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:25,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:28:25,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:25,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:28:25,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723917851] [2019-11-23 22:28:25,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:25,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:25,428 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 11 states. [2019-11-23 22:28:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:25,487 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2019-11-23 22:28:25,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:25,488 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2019-11-23 22:28:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:25,489 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:28:25,489 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:28:25,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:28:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 22:28:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 22:28:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2019-11-23 22:28:25,512 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 71 [2019-11-23 22:28:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:25,513 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2019-11-23 22:28:25,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2019-11-23 22:28:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 22:28:25,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:25,517 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:25,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,722 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash 814816789, now seen corresponding path program 8 times [2019-11-23 22:28:25,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:25,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555973010] [2019-11-23 22:28:25,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:28:25,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555973010] [2019-11-23 22:28:25,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864886823] [2019-11-23 22:28:25,831 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 [2019-11-23 22:28:25,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:25,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:25,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:28:25,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:28:25,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:25,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:28:25,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060748990] [2019-11-23 22:28:25,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:28:25,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:28:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:25,930 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 12 states. [2019-11-23 22:28:25,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:25,965 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2019-11-23 22:28:25,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:28:25,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-11-23 22:28:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:25,968 INFO L225 Difference]: With dead ends: 132 [2019-11-23 22:28:25,968 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 22:28:25,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:25,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 22:28:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-11-23 22:28:25,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 22:28:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2019-11-23 22:28:25,974 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 73 [2019-11-23 22:28:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:25,975 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2019-11-23 22:28:25,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:28:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2019-11-23 22:28:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 22:28:25,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:25,976 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:26,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:26,180 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1786469203, now seen corresponding path program 9 times [2019-11-23 22:28:26,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:26,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002112777] [2019-11-23 22:28:26,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 22:28:26,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002112777] [2019-11-23 22:28:26,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24147738] [2019-11-23 22:28:26,314 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 [2019-11-23 22:28:26,374 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:28:26,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:26,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:26,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 22:28:26,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:26,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-11-23 22:28:26,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564055394] [2019-11-23 22:28:26,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:28:26,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:26,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:28:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:26,413 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 15 states. [2019-11-23 22:28:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:26,513 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2019-11-23 22:28:26,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:28:26,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2019-11-23 22:28:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:26,515 INFO L225 Difference]: With dead ends: 137 [2019-11-23 22:28:26,515 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:28:26,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:28:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-11-23 22:28:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:28:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2019-11-23 22:28:26,528 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 75 [2019-11-23 22:28:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:26,528 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2019-11-23 22:28:26,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:28:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2019-11-23 22:28:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:28:26,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:26,529 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:26,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:26,738 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1423401871, now seen corresponding path program 10 times [2019-11-23 22:28:26,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:26,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48808142] [2019-11-23 22:28:26,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 22:28:26,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48808142] [2019-11-23 22:28:26,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168386003] [2019-11-23 22:28:26,885 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 [2019-11-23 22:28:26,976 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:26,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:26,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:28:26,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 22:28:27,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:27,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2019-11-23 22:28:27,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331960138] [2019-11-23 22:28:27,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:28:27,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:27,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:28:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:27,060 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand 18 states. [2019-11-23 22:28:27,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:27,177 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2019-11-23 22:28:27,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:28:27,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-11-23 22:28:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:27,179 INFO L225 Difference]: With dead ends: 155 [2019-11-23 22:28:27,179 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:28:27,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:28:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2019-11-23 22:28:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 22:28:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2019-11-23 22:28:27,184 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 79 [2019-11-23 22:28:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:27,184 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2019-11-23 22:28:27,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:28:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2019-11-23 22:28:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 22:28:27,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:27,186 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:27,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:27,391 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:27,392 INFO L82 PathProgramCache]: Analyzing trace with hash 647910148, now seen corresponding path program 11 times [2019-11-23 22:28:27,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:27,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495125518] [2019-11-23 22:28:27,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-23 22:28:27,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495125518] [2019-11-23 22:28:27,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173693248] [2019-11-23 22:28:27,543 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:27,713 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:28:27,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:27,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:28:27,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-23 22:28:27,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:27,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2019-11-23 22:28:27,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470730730] [2019-11-23 22:28:27,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:28:27,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:28:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:27,795 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 18 states. [2019-11-23 22:28:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:27,882 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2019-11-23 22:28:27,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:28:27,883 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 90 [2019-11-23 22:28:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:27,884 INFO L225 Difference]: With dead ends: 163 [2019-11-23 22:28:27,884 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 22:28:27,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 22:28:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-23 22:28:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:28:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2019-11-23 22:28:27,889 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 90 [2019-11-23 22:28:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:27,889 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2019-11-23 22:28:27,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:28:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2019-11-23 22:28:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:28:27,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:27,890 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:28,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:28,095 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1749882872, now seen corresponding path program 12 times [2019-11-23 22:28:28,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:28,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4363984] [2019-11-23 22:28:28,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 22:28:28,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4363984] [2019-11-23 22:28:28,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426539334] [2019-11-23 22:28:28,509 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:28,826 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:28:28,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:28,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:28:28,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2019-11-23 22:28:28,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:28,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:28:28,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003408938] [2019-11-23 22:28:28,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:28:28,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:28,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:28:28,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:28,900 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 20 states. [2019-11-23 22:28:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:28,983 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2019-11-23 22:28:28,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:28:28,983 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2019-11-23 22:28:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:28,984 INFO L225 Difference]: With dead ends: 169 [2019-11-23 22:28:28,984 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 22:28:28,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 22:28:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2019-11-23 22:28:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 22:28:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2019-11-23 22:28:28,990 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 94 [2019-11-23 22:28:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:28,990 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2019-11-23 22:28:28,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:28:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2019-11-23 22:28:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-23 22:28:28,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:28,991 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 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] [2019-11-23 22:28:29,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:29,195 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:29,196 INFO L82 PathProgramCache]: Analyzing trace with hash -115639540, now seen corresponding path program 13 times [2019-11-23 22:28:29,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:29,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486904785] [2019-11-23 22:28:29,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:29,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486904785] [2019-11-23 22:28:29,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473175005] [2019-11-23 22:28:29,376 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:29,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:28:29,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:29,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:29,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:28:29,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361181739] [2019-11-23 22:28:29,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:28:29,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:28:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:28:29,507 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 17 states. [2019-11-23 22:28:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:29,551 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2019-11-23 22:28:29,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:29,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2019-11-23 22:28:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:29,553 INFO L225 Difference]: With dead ends: 172 [2019-11-23 22:28:29,553 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 22:28:29,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:28:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 22:28:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-11-23 22:28:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 22:28:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2019-11-23 22:28:29,558 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 98 [2019-11-23 22:28:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:29,558 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2019-11-23 22:28:29,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:28:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2019-11-23 22:28:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 22:28:29,560 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:29,560 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 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] [2019-11-23 22:28:29,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:29,764 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash 367132558, now seen corresponding path program 14 times [2019-11-23 22:28:29,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:29,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021440854] [2019-11-23 22:28:29,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:29,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021440854] [2019-11-23 22:28:29,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982791543] [2019-11-23 22:28:29,949 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:30,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:30,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:30,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:28:30,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:30,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:30,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:28:30,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560024752] [2019-11-23 22:28:30,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:28:30,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:28:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:30,112 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 18 states. [2019-11-23 22:28:30,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:30,176 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2019-11-23 22:28:30,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:28:30,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 100 [2019-11-23 22:28:30,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:30,177 INFO L225 Difference]: With dead ends: 174 [2019-11-23 22:28:30,177 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:28:30,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:28:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:28:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 22:28:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 22:28:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2019-11-23 22:28:30,181 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 100 [2019-11-23 22:28:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:30,184 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2019-11-23 22:28:30,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:28:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2019-11-23 22:28:30,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 22:28:30,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:30,185 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 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] [2019-11-23 22:28:30,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:30,389 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:30,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:30,390 INFO L82 PathProgramCache]: Analyzing trace with hash 454650768, now seen corresponding path program 15 times [2019-11-23 22:28:30,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:30,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537007132] [2019-11-23 22:28:30,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:28:30,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537007132] [2019-11-23 22:28:30,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349746100] [2019-11-23 22:28:30,598 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:30,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:28:30,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:30,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:28:30,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-11-23 22:28:30,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:30,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 22:28:30,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400918396] [2019-11-23 22:28:30,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:28:30,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:30,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:28:30,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:28:30,811 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 24 states. [2019-11-23 22:28:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:31,020 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2019-11-23 22:28:31,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:28:31,021 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 102 [2019-11-23 22:28:31,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:31,022 INFO L225 Difference]: With dead ends: 191 [2019-11-23 22:28:31,022 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 22:28:31,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:28:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 22:28:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2019-11-23 22:28:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:28:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2019-11-23 22:28:31,026 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 102 [2019-11-23 22:28:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:31,027 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2019-11-23 22:28:31,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:28:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2019-11-23 22:28:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:28:31,028 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:31,028 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:31,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:31,232 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:31,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1442664353, now seen corresponding path program 16 times [2019-11-23 22:28:31,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:31,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737105268] [2019-11-23 22:28:31,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:31,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737105268] [2019-11-23 22:28:31,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654908726] [2019-11-23 22:28:31,445 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:31,548 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:31,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:31,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 22:28:31,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:31,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:31,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 22:28:31,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667911089] [2019-11-23 22:28:31,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:28:31,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:31,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:28:31,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:31,581 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 20 states. [2019-11-23 22:28:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:31,647 INFO L93 Difference]: Finished difference Result 196 states and 240 transitions. [2019-11-23 22:28:31,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:28:31,648 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2019-11-23 22:28:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:31,649 INFO L225 Difference]: With dead ends: 196 [2019-11-23 22:28:31,649 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:28:31,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:28:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:28:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 22:28:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:28:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2019-11-23 22:28:31,654 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 113 [2019-11-23 22:28:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:31,654 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2019-11-23 22:28:31,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:28:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2019-11-23 22:28:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 22:28:31,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:31,656 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:31,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:31,860 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1794529181, now seen corresponding path program 17 times [2019-11-23 22:28:31,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:31,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286885336] [2019-11-23 22:28:31,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:32,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286885336] [2019-11-23 22:28:32,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969704028] [2019-11-23 22:28:32,074 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:33,075 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:28:33,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:33,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:28:33,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:33,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:33,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:28:33,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886493817] [2019-11-23 22:28:33,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:28:33,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:33,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:28:33,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:28:33,111 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand 21 states. [2019-11-23 22:28:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:33,178 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2019-11-23 22:28:33,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:28:33,178 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 115 [2019-11-23 22:28:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:33,179 INFO L225 Difference]: With dead ends: 198 [2019-11-23 22:28:33,179 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 22:28:33,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:28:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 22:28:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-11-23 22:28:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 22:28:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2019-11-23 22:28:33,184 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 115 [2019-11-23 22:28:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:33,184 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2019-11-23 22:28:33,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:28:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2019-11-23 22:28:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 22:28:33,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:33,185 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:33,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:33,390 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:33,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1113774245, now seen corresponding path program 18 times [2019-11-23 22:28:33,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:33,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746973202] [2019-11-23 22:28:33,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 22:28:33,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746973202] [2019-11-23 22:28:33,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258946879] [2019-11-23 22:28:33,677 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:34,087 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:28:34,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:34,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:28:34,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-11-23 22:28:34,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:34,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-11-23 22:28:34,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618645481] [2019-11-23 22:28:34,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:28:34,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:34,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:28:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:28:34,190 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand 27 states. [2019-11-23 22:28:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:34,310 INFO L93 Difference]: Finished difference Result 203 states and 248 transitions. [2019-11-23 22:28:34,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:28:34,310 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 117 [2019-11-23 22:28:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:34,311 INFO L225 Difference]: With dead ends: 203 [2019-11-23 22:28:34,311 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 22:28:34,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:28:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 22:28:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2019-11-23 22:28:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 22:28:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2019-11-23 22:28:34,316 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 117 [2019-11-23 22:28:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:34,316 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2019-11-23 22:28:34,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:28:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2019-11-23 22:28:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 22:28:34,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:34,318 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:34,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:34,518 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:34,519 INFO L82 PathProgramCache]: Analyzing trace with hash -591369833, now seen corresponding path program 19 times [2019-11-23 22:28:34,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:34,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965626236] [2019-11-23 22:28:34,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 22:28:34,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965626236] [2019-11-23 22:28:34,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155369872] [2019-11-23 22:28:34,785 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:34,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 22:28:34,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 22:28:34,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:34,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 22:28:34,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459732611] [2019-11-23 22:28:34,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:28:34,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:34,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:28:34,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:28:34,932 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 23 states. [2019-11-23 22:28:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:35,007 INFO L93 Difference]: Finished difference Result 206 states and 250 transitions. [2019-11-23 22:28:35,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:28:35,008 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2019-11-23 22:28:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:35,009 INFO L225 Difference]: With dead ends: 206 [2019-11-23 22:28:35,009 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 22:28:35,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:28:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 22:28:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-11-23 22:28:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 22:28:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2019-11-23 22:28:35,014 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 121 [2019-11-23 22:28:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:35,014 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2019-11-23 22:28:35,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:28:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2019-11-23 22:28:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 22:28:35,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:35,015 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:35,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:35,219 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:35,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:35,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2018512171, now seen corresponding path program 20 times [2019-11-23 22:28:35,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:35,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461540466] [2019-11-23 22:28:35,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 22:28:35,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461540466] [2019-11-23 22:28:35,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959120105] [2019-11-23 22:28:35,569 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:35,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:35,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:35,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:28:35,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 22:28:35,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:35,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 22:28:35,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437036471] [2019-11-23 22:28:35,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:28:35,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:35,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:28:35,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:28:35,758 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand 24 states. [2019-11-23 22:28:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:35,847 INFO L93 Difference]: Finished difference Result 208 states and 252 transitions. [2019-11-23 22:28:35,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:28:35,850 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2019-11-23 22:28:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:35,852 INFO L225 Difference]: With dead ends: 208 [2019-11-23 22:28:35,852 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 22:28:35,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:28:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 22:28:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 22:28:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 22:28:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2019-11-23 22:28:35,861 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 123 [2019-11-23 22:28:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:35,861 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2019-11-23 22:28:35,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:28:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2019-11-23 22:28:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 22:28:35,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:35,862 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:36,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:36,067 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:36,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:36,068 INFO L82 PathProgramCache]: Analyzing trace with hash 887235731, now seen corresponding path program 21 times [2019-11-23 22:28:36,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:36,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093935220] [2019-11-23 22:28:36,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 22:28:36,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093935220] [2019-11-23 22:28:36,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993000954] [2019-11-23 22:28:36,421 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:36,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:28:36,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:36,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:28:36,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2019-11-23 22:28:36,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:36,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2019-11-23 22:28:36,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122490290] [2019-11-23 22:28:36,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:28:36,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:36,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:28:36,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:28:36,820 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand 35 states. [2019-11-23 22:28:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:37,196 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2019-11-23 22:28:37,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:28:37,196 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 125 [2019-11-23 22:28:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:37,198 INFO L225 Difference]: With dead ends: 229 [2019-11-23 22:28:37,198 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 22:28:37,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:28:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 22:28:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-11-23 22:28:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 22:28:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 176 transitions. [2019-11-23 22:28:37,204 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 176 transitions. Word has length 125 [2019-11-23 22:28:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:37,205 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 176 transitions. [2019-11-23 22:28:37,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:28:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 176 transitions. [2019-11-23 22:28:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 22:28:37,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:37,207 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:37,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:37,413 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1127054609, now seen corresponding path program 22 times [2019-11-23 22:28:37,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:37,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996464959] [2019-11-23 22:28:37,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-11-23 22:28:37,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996464959] [2019-11-23 22:28:37,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894621835] [2019-11-23 22:28:37,820 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:37,913 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:37,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:37,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:28:37,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-11-23 22:28:37,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:37,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 22:28:37,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354351676] [2019-11-23 22:28:37,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:28:37,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:28:37,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:28:37,944 INFO L87 Difference]: Start difference. First operand 148 states and 176 transitions. Second operand 27 states. [2019-11-23 22:28:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:38,019 INFO L93 Difference]: Finished difference Result 250 states and 306 transitions. [2019-11-23 22:28:38,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:28:38,019 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 147 [2019-11-23 22:28:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:38,020 INFO L225 Difference]: With dead ends: 250 [2019-11-23 22:28:38,020 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 22:28:38,021 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:28:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 22:28:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2019-11-23 22:28:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 22:28:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 178 transitions. [2019-11-23 22:28:38,027 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 178 transitions. Word has length 147 [2019-11-23 22:28:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:38,027 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 178 transitions. [2019-11-23 22:28:38,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:28:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 178 transitions. [2019-11-23 22:28:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 22:28:38,028 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:38,028 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:38,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:38,232 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash -828712275, now seen corresponding path program 23 times [2019-11-23 22:28:38,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:38,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303097112] [2019-11-23 22:28:38,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2019-11-23 22:28:38,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303097112] [2019-11-23 22:28:38,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314675012] [2019-11-23 22:28:38,761 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:40,145 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:28:40,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:40,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:28:40,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2019-11-23 22:28:40,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:40,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11] total 36 [2019-11-23 22:28:40,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218591667] [2019-11-23 22:28:40,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:28:40,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:28:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:28:40,428 INFO L87 Difference]: Start difference. First operand 150 states and 178 transitions. Second operand 36 states. [2019-11-23 22:28:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:40,624 INFO L93 Difference]: Finished difference Result 267 states and 332 transitions. [2019-11-23 22:28:40,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:28:40,625 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 149 [2019-11-23 22:28:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:40,626 INFO L225 Difference]: With dead ends: 267 [2019-11-23 22:28:40,626 INFO L226 Difference]: Without dead ends: 168 [2019-11-23 22:28:40,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:28:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-23 22:28:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2019-11-23 22:28:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-11-23 22:28:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2019-11-23 22:28:40,633 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 149 [2019-11-23 22:28:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:40,634 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2019-11-23 22:28:40,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:28:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2019-11-23 22:28:40,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-23 22:28:40,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:40,635 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:40,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:40,841 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1714413926, now seen corresponding path program 24 times [2019-11-23 22:28:40,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:40,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067587707] [2019-11-23 22:28:40,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-11-23 22:28:41,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067587707] [2019-11-23 22:28:41,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543355634] [2019-11-23 22:28:41,333 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:42,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:28:42,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:42,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:28:42,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2019-11-23 22:28:42,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:42,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2019-11-23 22:28:42,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957576216] [2019-11-23 22:28:42,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:28:42,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:42,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:28:42,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=777, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:28:42,323 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand 35 states. [2019-11-23 22:28:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:42,472 INFO L93 Difference]: Finished difference Result 275 states and 338 transitions. [2019-11-23 22:28:42,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:28:42,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 160 [2019-11-23 22:28:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:42,473 INFO L225 Difference]: With dead ends: 275 [2019-11-23 22:28:42,473 INFO L226 Difference]: Without dead ends: 167 [2019-11-23 22:28:42,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=413, Invalid=777, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:28:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-23 22:28:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-11-23 22:28:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-23 22:28:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2019-11-23 22:28:42,478 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 160 [2019-11-23 22:28:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:42,478 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2019-11-23 22:28:42,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:28:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2019-11-23 22:28:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 22:28:42,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:42,479 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:42,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:42,684 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash 458094954, now seen corresponding path program 25 times [2019-11-23 22:28:42,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:42,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935057312] [2019-11-23 22:28:42,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:28:43,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935057312] [2019-11-23 22:28:43,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375175988] [2019-11-23 22:28:43,138 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:43,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 22:28:43,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:28:43,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:43,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 22:28:43,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85946417] [2019-11-23 22:28:43,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:28:43,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:43,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:28:43,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:28:43,292 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand 30 states. [2019-11-23 22:28:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:43,392 INFO L93 Difference]: Finished difference Result 278 states and 340 transitions. [2019-11-23 22:28:43,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:28:43,392 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 164 [2019-11-23 22:28:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:43,393 INFO L225 Difference]: With dead ends: 278 [2019-11-23 22:28:43,393 INFO L226 Difference]: Without dead ends: 168 [2019-11-23 22:28:43,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:28:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-23 22:28:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2019-11-23 22:28:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-11-23 22:28:43,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2019-11-23 22:28:43,401 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 164 [2019-11-23 22:28:43,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:43,401 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2019-11-23 22:28:43,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:28:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2019-11-23 22:28:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 22:28:43,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:43,403 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:43,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:43,606 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:43,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1252283756, now seen corresponding path program 26 times [2019-11-23 22:28:43,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:43,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770180628] [2019-11-23 22:28:43,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:28:44,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770180628] [2019-11-23 22:28:44,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118418246] [2019-11-23 22:28:44,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:44,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:44,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:44,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:28:44,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:28:44,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:44,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:28:44,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249859685] [2019-11-23 22:28:44,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:28:44,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:28:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:28:44,194 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 31 states. [2019-11-23 22:28:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:44,299 INFO L93 Difference]: Finished difference Result 280 states and 342 transitions. [2019-11-23 22:28:44,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:28:44,299 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 166 [2019-11-23 22:28:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:44,300 INFO L225 Difference]: With dead ends: 280 [2019-11-23 22:28:44,300 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 22:28:44,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:28:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 22:28:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-11-23 22:28:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-11-23 22:28:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2019-11-23 22:28:44,307 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 166 [2019-11-23 22:28:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:44,307 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2019-11-23 22:28:44,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:28:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2019-11-23 22:28:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 22:28:44,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:44,309 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:44,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:44,513 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash -36456210, now seen corresponding path program 27 times [2019-11-23 22:28:44,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:44,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564033612] [2019-11-23 22:28:44,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 22:28:45,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564033612] [2019-11-23 22:28:45,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946512896] [2019-11-23 22:28:45,081 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:45,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:28:45,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:45,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:45,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1135 trivial. 0 not checked. [2019-11-23 22:28:45,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:45,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2019-11-23 22:28:45,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856780886] [2019-11-23 22:28:45,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:28:45,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:45,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:28:45,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:28:45,505 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand 39 states. [2019-11-23 22:28:45,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:45,706 INFO L93 Difference]: Finished difference Result 285 states and 348 transitions. [2019-11-23 22:28:45,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:28:45,707 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 168 [2019-11-23 22:28:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:45,708 INFO L225 Difference]: With dead ends: 285 [2019-11-23 22:28:45,708 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 22:28:45,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=509, Invalid=973, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:28:45,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 22:28:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2019-11-23 22:28:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-23 22:28:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2019-11-23 22:28:45,715 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 168 [2019-11-23 22:28:45,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:45,716 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2019-11-23 22:28:45,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:28:45,716 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2019-11-23 22:28:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-23 22:28:45,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:45,717 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:45,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:45,923 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:45,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash 895905010, now seen corresponding path program 28 times [2019-11-23 22:28:45,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:45,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20012392] [2019-11-23 22:28:45,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2019-11-23 22:28:46,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20012392] [2019-11-23 22:28:46,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451188437] [2019-11-23 22:28:46,375 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:46,513 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:46,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:46,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:28:46,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2019-11-23 22:28:46,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:46,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 22:28:46,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720090724] [2019-11-23 22:28:46,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:28:46,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:28:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:28:46,728 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 42 states. [2019-11-23 22:28:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:46,957 INFO L93 Difference]: Finished difference Result 303 states and 374 transitions. [2019-11-23 22:28:46,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:28:46,957 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 172 [2019-11-23 22:28:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:46,959 INFO L225 Difference]: With dead ends: 303 [2019-11-23 22:28:46,960 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 22:28:46,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:28:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 22:28:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2019-11-23 22:28:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 22:28:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2019-11-23 22:28:46,967 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 172 [2019-11-23 22:28:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:46,967 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2019-11-23 22:28:46,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:28:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2019-11-23 22:28:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:28:46,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:46,968 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:47,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:47,172 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1181418755, now seen corresponding path program 29 times [2019-11-23 22:28:47,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:47,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610040253] [2019-11-23 22:28:47,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2019-11-23 22:28:47,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610040253] [2019-11-23 22:28:47,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390260678] [2019-11-23 22:28:47,751 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:50,359 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-11-23 22:28:50,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:50,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:28:50,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2019-11-23 22:28:50,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:50,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2019-11-23 22:28:50,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571992049] [2019-11-23 22:28:50,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:28:50,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:28:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1140, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:28:50,630 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand 42 states. [2019-11-23 22:28:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:50,830 INFO L93 Difference]: Finished difference Result 311 states and 380 transitions. [2019-11-23 22:28:50,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:28:50,830 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 183 [2019-11-23 22:28:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:50,832 INFO L225 Difference]: With dead ends: 311 [2019-11-23 22:28:50,832 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 22:28:50,835 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=582, Invalid=1140, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:28:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 22:28:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2019-11-23 22:28:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:28:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2019-11-23 22:28:50,845 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 183 [2019-11-23 22:28:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:50,849 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2019-11-23 22:28:50,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:28:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2019-11-23 22:28:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 22:28:50,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:50,851 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:51,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:51,060 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:51,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1510873031, now seen corresponding path program 30 times [2019-11-23 22:28:51,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:51,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527648536] [2019-11-23 22:28:51,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2019-11-23 22:28:51,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527648536] [2019-11-23 22:28:51,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688717878] [2019-11-23 22:28:51,719 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:54,640 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:28:54,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:54,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:28:54,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1396 trivial. 0 not checked. [2019-11-23 22:28:54,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:54,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12] total 44 [2019-11-23 22:28:54,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633794926] [2019-11-23 22:28:54,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:28:54,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:54,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:28:54,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:28:54,869 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand 44 states. [2019-11-23 22:28:55,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:55,091 INFO L93 Difference]: Finished difference Result 317 states and 386 transitions. [2019-11-23 22:28:55,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:28:55,091 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 187 [2019-11-23 22:28:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:55,092 INFO L225 Difference]: With dead ends: 317 [2019-11-23 22:28:55,092 INFO L226 Difference]: Without dead ends: 194 [2019-11-23 22:28:55,093 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:28:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-23 22:28:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2019-11-23 22:28:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 22:28:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 226 transitions. [2019-11-23 22:28:55,099 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 226 transitions. Word has length 187 [2019-11-23 22:28:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:55,100 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 226 transitions. [2019-11-23 22:28:55,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:28:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 226 transitions. [2019-11-23 22:28:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 22:28:55,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:55,101 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:55,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:55,307 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1422022795, now seen corresponding path program 31 times [2019-11-23 22:28:55,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:55,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746117394] [2019-11-23 22:28:55,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-23 22:28:55,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746117394] [2019-11-23 22:28:55,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810633111] [2019-11-23 22:28:55,856 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:55,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 22:28:55,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-23 22:28:56,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:56,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 22:28:56,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758473611] [2019-11-23 22:28:56,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:28:56,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:28:56,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:28:56,052 INFO L87 Difference]: Start difference. First operand 192 states and 226 transitions. Second operand 36 states. [2019-11-23 22:28:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:56,145 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2019-11-23 22:28:56,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:28:56,146 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 191 [2019-11-23 22:28:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:56,147 INFO L225 Difference]: With dead ends: 320 [2019-11-23 22:28:56,147 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 22:28:56,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:28:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 22:28:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-23 22:28:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 22:28:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 228 transitions. [2019-11-23 22:28:56,153 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 228 transitions. Word has length 191 [2019-11-23 22:28:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:56,153 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 228 transitions. [2019-11-23 22:28:56,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:28:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 228 transitions. [2019-11-23 22:28:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 22:28:56,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:56,155 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:56,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:56,359 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:56,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1771054541, now seen corresponding path program 32 times [2019-11-23 22:28:56,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:56,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615770185] [2019-11-23 22:28:56,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-23 22:28:56,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615770185] [2019-11-23 22:28:56,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151782337] [2019-11-23 22:28:56,887 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:57,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:57,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:57,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:28:57,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-23 22:28:57,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:57,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 22:28:57,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958146613] [2019-11-23 22:28:57,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:28:57,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:28:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:28:57,051 INFO L87 Difference]: Start difference. First operand 194 states and 228 transitions. Second operand 37 states. [2019-11-23 22:28:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:57,175 INFO L93 Difference]: Finished difference Result 322 states and 390 transitions. [2019-11-23 22:28:57,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:28:57,176 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 193 [2019-11-23 22:28:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:57,177 INFO L225 Difference]: With dead ends: 322 [2019-11-23 22:28:57,177 INFO L226 Difference]: Without dead ends: 197 [2019-11-23 22:28:57,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:28:57,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-23 22:28:57,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-23 22:28:57,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 22:28:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 230 transitions. [2019-11-23 22:28:57,184 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 230 transitions. Word has length 193 [2019-11-23 22:28:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:57,184 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 230 transitions. [2019-11-23 22:28:57,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:28:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 230 transitions. [2019-11-23 22:28:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 22:28:57,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:57,185 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:57,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:57,389 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:57,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2111853937, now seen corresponding path program 33 times [2019-11-23 22:28:57,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:57,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268779301] [2019-11-23 22:28:57,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-11-23 22:28:57,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268779301] [2019-11-23 22:28:57,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944742952] [2019-11-23 22:28:57,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:58,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 22:28:58,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:58,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:28:58,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1546 trivial. 0 not checked. [2019-11-23 22:28:58,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:58,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 13] total 48 [2019-11-23 22:28:58,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2775697] [2019-11-23 22:28:58,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 22:28:58,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:58,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 22:28:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=1513, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:28:58,773 INFO L87 Difference]: Start difference. First operand 196 states and 230 transitions. Second operand 48 states. [2019-11-23 22:28:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:59,138 INFO L93 Difference]: Finished difference Result 339 states and 416 transitions. [2019-11-23 22:28:59,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 22:28:59,138 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 195 [2019-11-23 22:28:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:59,140 INFO L225 Difference]: With dead ends: 339 [2019-11-23 22:28:59,140 INFO L226 Difference]: Without dead ends: 214 [2019-11-23 22:28:59,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=743, Invalid=1513, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:28:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-11-23 22:28:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2019-11-23 22:28:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-11-23 22:28:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 244 transitions. [2019-11-23 22:28:59,148 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 244 transitions. Word has length 195 [2019-11-23 22:28:59,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:59,148 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 244 transitions. [2019-11-23 22:28:59,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 22:28:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 244 transitions. [2019-11-23 22:28:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-11-23 22:28:59,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:59,150 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:59,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:59,355 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1119694370, now seen corresponding path program 34 times [2019-11-23 22:28:59,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:59,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468249266] [2019-11-23 22:28:59,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 22:29:00,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468249266] [2019-11-23 22:29:00,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245382829] [2019-11-23 22:29:00,009 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:00,132 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:00,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:00,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 22:29:00,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1853 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 22:29:00,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:00,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 22:29:00,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473429772] [2019-11-23 22:29:00,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:29:00,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:29:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:29:00,171 INFO L87 Difference]: Start difference. First operand 207 states and 244 transitions. Second operand 39 states. [2019-11-23 22:29:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:00,315 INFO L93 Difference]: Finished difference Result 344 states and 418 transitions. [2019-11-23 22:29:00,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:29:00,316 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 206 [2019-11-23 22:29:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:00,317 INFO L225 Difference]: With dead ends: 344 [2019-11-23 22:29:00,317 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 22:29:00,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:29:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 22:29:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2019-11-23 22:29:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-11-23 22:29:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2019-11-23 22:29:00,324 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 206 [2019-11-23 22:29:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:00,324 INFO L462 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2019-11-23 22:29:00,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:29:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2019-11-23 22:29:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-23 22:29:00,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:00,326 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:00,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:00,530 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:00,531 INFO L82 PathProgramCache]: Analyzing trace with hash 887318436, now seen corresponding path program 35 times [2019-11-23 22:29:00,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:00,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849926664] [2019-11-23 22:29:00,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2019-11-23 22:29:01,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849926664] [2019-11-23 22:29:01,161 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971713587] [2019-11-23 22:29:01,161 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:37,208 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-11-23 22:29:37,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:37,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:29:37,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1824 trivial. 0 not checked. [2019-11-23 22:29:37,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:37,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2019-11-23 22:29:37,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639624809] [2019-11-23 22:29:37,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:29:37,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:37,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:29:37,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:29:37,502 INFO L87 Difference]: Start difference. First operand 209 states and 246 transitions. Second operand 50 states. [2019-11-23 22:29:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:37,673 INFO L93 Difference]: Finished difference Result 349 states and 424 transitions. [2019-11-23 22:29:37,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:29:37,674 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 208 [2019-11-23 22:29:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:37,676 INFO L225 Difference]: With dead ends: 349 [2019-11-23 22:29:37,676 INFO L226 Difference]: Without dead ends: 215 [2019-11-23 22:29:37,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=818, Invalid=1632, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:29:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-11-23 22:29:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2019-11-23 22:29:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-23 22:29:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 250 transitions. [2019-11-23 22:29:37,684 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 250 transitions. Word has length 208 [2019-11-23 22:29:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:37,684 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 250 transitions. [2019-11-23 22:29:37,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:29:37,684 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 250 transitions. [2019-11-23 22:29:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-11-23 22:29:37,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:37,686 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:37,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:37,900 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:37,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:37,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2028610216, now seen corresponding path program 36 times [2019-11-23 22:29:37,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:37,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696761553] [2019-11-23 22:29:37,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2019-11-23 22:29:38,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696761553] [2019-11-23 22:29:38,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526179895] [2019-11-23 22:29:38,547 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:42,348 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-11-23 22:29:42,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:42,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 22:29:42,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2018 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1897 trivial. 0 not checked. [2019-11-23 22:29:42,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:42,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 14] total 52 [2019-11-23 22:29:42,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596161051] [2019-11-23 22:29:42,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 22:29:42,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:42,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 22:29:42,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=1782, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:29:42,644 INFO L87 Difference]: Start difference. First operand 213 states and 250 transitions. Second operand 52 states. [2019-11-23 22:29:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:42,921 INFO L93 Difference]: Finished difference Result 355 states and 430 transitions. [2019-11-23 22:29:42,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 22:29:42,922 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 212 [2019-11-23 22:29:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:42,923 INFO L225 Difference]: With dead ends: 355 [2019-11-23 22:29:42,923 INFO L226 Difference]: Without dead ends: 219 [2019-11-23 22:29:42,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=870, Invalid=1782, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:29:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-11-23 22:29:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2019-11-23 22:29:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-11-23 22:29:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 254 transitions. [2019-11-23 22:29:42,929 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 254 transitions. Word has length 212 [2019-11-23 22:29:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:42,930 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 254 transitions. [2019-11-23 22:29:42,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 22:29:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 254 transitions. [2019-11-23 22:29:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-23 22:29:42,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:42,931 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:43,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:43,138 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash 809638828, now seen corresponding path program 37 times [2019-11-23 22:29:43,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:43,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530726136] [2019-11-23 22:29:43,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-23 22:29:44,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530726136] [2019-11-23 22:29:44,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857274614] [2019-11-23 22:29:44,046 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:44,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 22:29:44,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-23 22:29:44,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:44,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 22:29:44,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822511090] [2019-11-23 22:29:44,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:29:44,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:44,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:29:44,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:29:44,230 INFO L87 Difference]: Start difference. First operand 217 states and 254 transitions. Second operand 42 states. [2019-11-23 22:29:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:44,365 INFO L93 Difference]: Finished difference Result 358 states and 432 transitions. [2019-11-23 22:29:44,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:29:44,365 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 216 [2019-11-23 22:29:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:44,366 INFO L225 Difference]: With dead ends: 358 [2019-11-23 22:29:44,366 INFO L226 Difference]: Without dead ends: 220 [2019-11-23 22:29:44,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:29:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-11-23 22:29:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2019-11-23 22:29:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-11-23 22:29:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 256 transitions. [2019-11-23 22:29:44,373 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 256 transitions. Word has length 216 [2019-11-23 22:29:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:44,373 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 256 transitions. [2019-11-23 22:29:44,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:29:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 256 transitions. [2019-11-23 22:29:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-11-23 22:29:44,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:44,375 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:44,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:44,579 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1294476626, now seen corresponding path program 38 times [2019-11-23 22:29:44,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:44,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234490204] [2019-11-23 22:29:44,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-23 22:29:45,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234490204] [2019-11-23 22:29:45,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39902233] [2019-11-23 22:29:45,363 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:45,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:45,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:45,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:29:45,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-23 22:29:45,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:45,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 22:29:45,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833804398] [2019-11-23 22:29:45,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:29:45,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:45,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:29:45,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:29:45,573 INFO L87 Difference]: Start difference. First operand 219 states and 256 transitions. Second operand 43 states. [2019-11-23 22:29:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:45,721 INFO L93 Difference]: Finished difference Result 360 states and 434 transitions. [2019-11-23 22:29:45,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:29:45,721 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 218 [2019-11-23 22:29:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:45,723 INFO L225 Difference]: With dead ends: 360 [2019-11-23 22:29:45,723 INFO L226 Difference]: Without dead ends: 222 [2019-11-23 22:29:45,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:29:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-23 22:29:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2019-11-23 22:29:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-23 22:29:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 258 transitions. [2019-11-23 22:29:45,731 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 258 transitions. Word has length 218 [2019-11-23 22:29:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:45,732 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 258 transitions. [2019-11-23 22:29:45,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:29:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 258 transitions. [2019-11-23 22:29:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-11-23 22:29:45,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:45,733 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:45,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:45,937 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -419831504, now seen corresponding path program 39 times [2019-11-23 22:29:45,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:45,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969362714] [2019-11-23 22:29:45,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-23 22:29:46,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969362714] [2019-11-23 22:29:46,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478097973] [2019-11-23 22:29:46,795 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:47,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 22:29:47,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:47,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 22:29:47,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2272 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 2096 trivial. 0 not checked. [2019-11-23 22:29:47,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:47,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2019-11-23 22:29:47,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086325643] [2019-11-23 22:29:47,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:29:47,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:29:47,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:29:47,457 INFO L87 Difference]: Start difference. First operand 221 states and 258 transitions. Second operand 55 states. [2019-11-23 22:29:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,900 INFO L93 Difference]: Finished difference Result 377 states and 460 transitions. [2019-11-23 22:29:47,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 22:29:47,900 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 220 [2019-11-23 22:29:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,902 INFO L225 Difference]: With dead ends: 377 [2019-11-23 22:29:47,902 INFO L226 Difference]: Without dead ends: 239 [2019-11-23 22:29:47,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:29:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-11-23 22:29:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2019-11-23 22:29:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-11-23 22:29:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 272 transitions. [2019-11-23 22:29:47,908 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 272 transitions. Word has length 220 [2019-11-23 22:29:47,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,909 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 272 transitions. [2019-11-23 22:29:47,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:29:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 272 transitions. [2019-11-23 22:29:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-11-23 22:29:47,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,910 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:48,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,116 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1897686273, now seen corresponding path program 40 times [2019-11-23 22:29:48,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311824031] [2019-11-23 22:29:48,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2455 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2019-11-23 22:29:48,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311824031] [2019-11-23 22:29:48,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937191255] [2019-11-23 22:29:48,892 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:49,042 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:49,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:49,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:29:49,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2455 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2019-11-23 22:29:49,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:49,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 22:29:49,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363279127] [2019-11-23 22:29:49,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:29:49,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:29:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:29:49,103 INFO L87 Difference]: Start difference. First operand 232 states and 272 transitions. Second operand 45 states. [2019-11-23 22:29:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:49,268 INFO L93 Difference]: Finished difference Result 382 states and 462 transitions. [2019-11-23 22:29:49,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:29:49,269 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 231 [2019-11-23 22:29:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:49,270 INFO L225 Difference]: With dead ends: 382 [2019-11-23 22:29:49,270 INFO L226 Difference]: Without dead ends: 235 [2019-11-23 22:29:49,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:29:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-11-23 22:29:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2019-11-23 22:29:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-11-23 22:29:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 274 transitions. [2019-11-23 22:29:49,276 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 274 transitions. Word has length 231 [2019-11-23 22:29:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:49,277 INFO L462 AbstractCegarLoop]: Abstraction has 234 states and 274 transitions. [2019-11-23 22:29:49,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:29:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 274 transitions. [2019-11-23 22:29:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-11-23 22:29:49,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:49,278 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:49,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:49,483 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2024032323, now seen corresponding path program 41 times [2019-11-23 22:29:49,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:49,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314655417] [2019-11-23 22:29:49,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2538 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2019-11-23 22:29:50,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314655417] [2019-11-23 22:29:50,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638753493] [2019-11-23 22:29:50,428 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true