/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/array-crafted/mapavg3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:11:50,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:11:50,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:11:50,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:11:50,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:11:50,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:11:50,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:11:50,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:11:50,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:11:50,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:11:50,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:11:50,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:11:50,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:11:50,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:11:50,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:11:50,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:11:50,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:11:50,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:11:50,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:11:50,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:11:50,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:11:50,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:11:50,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:11:50,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:11:50,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:11:50,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:11:50,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:11:50,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:11:50,502 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 20:11:50,521 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:11:50,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:11:50,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:11:50,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:11:50,524 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:11:50,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:11:50,525 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:11:50,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:11:50,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:11:50,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:11:50,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:11:50,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:11:50,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:11:50,527 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:11:50,527 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:11:50,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:11:50,528 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:11:50,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:11:50,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:11:50,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:11:50,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:11:50,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:11:50,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:11:50,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:11:50,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:11:50,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:11:50,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:11:50,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:11:50,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:11:50,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:11:50,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:11:50,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:11:50,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:11:50,824 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:11:50,824 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:11:50,825 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg3.i [2019-11-23 20:11:50,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58e31c68c/37a90f6b53b3467fb2888626951da9a3/FLAG9babe1f64 [2019-11-23 20:11:51,377 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:11:51,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg3.i [2019-11-23 20:11:51,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58e31c68c/37a90f6b53b3467fb2888626951da9a3/FLAG9babe1f64 [2019-11-23 20:11:51,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58e31c68c/37a90f6b53b3467fb2888626951da9a3 [2019-11-23 20:11:51,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:11:51,775 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:11:51,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:51,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:11:51,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:11:51,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:51" (1/1) ... [2019-11-23 20:11:51,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75923a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:51, skipping insertion in model container [2019-11-23 20:11:51,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:51" (1/1) ... [2019-11-23 20:11:51,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:11:51,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:11:52,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:52,018 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:11:52,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:52,055 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:11:52,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52 WrapperNode [2019-11-23 20:11:52,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:52,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:52,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:11:52,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:11:52,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:52,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:11:52,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:11:52,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:11:52,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (1/1) ... [2019-11-23 20:11:52,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:11:52,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:11:52,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:11:52,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:11:52,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (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 20:11:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:11:52,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:11:52,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:11:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:11:52,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:11:52,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:11:52,654 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:11:52,655 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:11:52,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:52 BoogieIcfgContainer [2019-11-23 20:11:52,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:11:52,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:11:52,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:11:52,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:11:52,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:11:51" (1/3) ... [2019-11-23 20:11:52,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5c3bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:52, skipping insertion in model container [2019-11-23 20:11:52,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:52" (2/3) ... [2019-11-23 20:11:52,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5c3bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:52, skipping insertion in model container [2019-11-23 20:11:52,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:52" (3/3) ... [2019-11-23 20:11:52,666 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg3.i [2019-11-23 20:11:52,674 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:11:52,680 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:11:52,690 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:11:52,711 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:11:52,711 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:11:52,711 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:11:52,711 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:11:52,711 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:11:52,712 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:11:52,712 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:11:52,712 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:11:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:11:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:11:52,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:52,731 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 20:11:52,731 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:52,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:11:52,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:52,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842272417] [2019-11-23 20:11:52,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:52,919 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 20:11:52,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842272417] [2019-11-23 20:11:52,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:52,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:52,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997034119] [2019-11-23 20:11:52,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:52,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:52,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:52,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:52,953 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:11:52,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:52,996 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:11:52,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:52,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:11:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:53,017 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:11:53,017 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:11:53,026 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 20:11:53,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:11:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:11:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:11:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:11:53,093 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:11:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:53,094 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:11:53,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:11:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:11:53,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:53,097 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 20:11:53,098 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:11:53,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:53,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423635776] [2019-11-23 20:11:53,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:53,221 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 20:11:53,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423635776] [2019-11-23 20:11:53,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:53,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:53,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623004303] [2019-11-23 20:11:53,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:53,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:53,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:53,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:53,230 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:11:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:53,301 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:11:53,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:53,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:11:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:53,303 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:11:53,303 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:11:53,305 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 20:11:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:11:53,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:11:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:11:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:11:53,320 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:11:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:53,320 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:11:53,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:11:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:11:53,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:53,323 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:53,324 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:11:53,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:53,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490757386] [2019-11-23 20:11:53,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:53,456 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 20:11:53,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490757386] [2019-11-23 20:11:53,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:53,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:53,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992460148] [2019-11-23 20:11:53,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:53,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:53,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:53,459 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:11:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:53,481 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:11:53,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:53,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:11:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:53,483 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:11:53,483 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:11:53,485 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 20:11:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:11:53,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:11:53,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:11:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:11:53,497 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:11:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:53,503 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:11:53,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:11:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:11:53,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:53,505 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] [2019-11-23 20:11:53,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:11:53,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:53,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826945557] [2019-11-23 20:11:53,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:53,624 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 20:11:53,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826945557] [2019-11-23 20:11:53,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247874746] [2019-11-23 20:11:53,625 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 20:11:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:53,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:53,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:53,770 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 20:11:53,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:53,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:11:53,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187175601] [2019-11-23 20:11:53,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:11:53,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:53,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:11:53,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:11:53,776 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:11:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:53,815 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:11:53,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:11:53,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:11:53,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:53,818 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:11:53,818 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:11:53,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 20:11:53,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:11:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:11:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:11:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:11:53,833 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:11:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:53,834 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:11:53,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:11:53,835 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:11:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:11:53,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:53,837 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] [2019-11-23 20:11:54,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:54,041 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:54,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:54,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:11:54,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:54,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084689074] [2019-11-23 20:11:54,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,114 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 20:11:54,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084689074] [2019-11-23 20:11:54,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362207478] [2019-11-23 20:11:54,115 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 20:11:54,196 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:54,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:54,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:54,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:54,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:54,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:11:54,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982860488] [2019-11-23 20:11:54,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:11:54,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:11:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:54,236 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:11:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:54,294 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:11:54,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:11:54,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:11:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:54,295 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:11:54,296 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:11:54,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:11:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:11:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:11:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:11:54,302 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:11:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:54,303 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:11:54,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:11:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:11:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:11:54,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:54,304 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:54,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:54,505 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:54,506 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:11:54,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:54,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351995863] [2019-11-23 20:11:54,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:54,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351995863] [2019-11-23 20:11:54,576 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294596118] [2019-11-23 20:11:54,576 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 20:11:54,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:11:54,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:54,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:54,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:11:54,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:54,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:11:54,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241263253] [2019-11-23 20:11:54,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:11:54,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:11:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:54,670 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:11:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:54,780 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:11:54,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:11:54,780 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:11:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:54,781 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:11:54,782 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:11:54,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 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 20:11:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:11:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:11:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:11:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:11:54,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:11:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:54,790 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:11:54,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:11:54,790 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:11:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:11:54,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:54,791 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-11-23 20:11:54,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:54,995 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:11:54,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:54,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026140729] [2019-11-23 20:11:54,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,105 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 20:11:55,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026140729] [2019-11-23 20:11:55,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403041349] [2019-11-23 20:11:55,106 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 20:11:55,175 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:55,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:55,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:55,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:11:55,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:55,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:11:55,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310714834] [2019-11-23 20:11:55,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:11:55,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:55,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:11:55,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:55,225 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:11:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:55,372 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:11:55,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:55,374 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:11:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:55,376 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:11:55,377 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:11:55,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 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 20:11:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:11:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:11:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:11:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:11:55,389 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:11:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:55,389 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:11:55,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:11:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:11:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:11:55,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,393 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:55,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:55,597 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:11:55,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:55,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550939770] [2019-11-23 20:11:55,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:11:55,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550939770] [2019-11-23 20:11:55,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928904735] [2019-11-23 20:11:55,702 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 20:11:55,787 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:11:55,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:55,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:11:55,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:11:55,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:55,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:11:55,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128731368] [2019-11-23 20:11:55,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:55,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:55,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:55,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:55,868 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:11:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:55,977 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:11:55,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:55,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:11:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:55,979 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:11:55,979 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:11:55,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:11:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:11:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:11:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:11:55,987 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:11:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:55,987 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:11:55,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:11:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:11:55,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:55,988 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 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 20:11:56,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,193 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:11:56,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219245606] [2019-11-23 20:11:56,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:11:56,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219245606] [2019-11-23 20:11:56,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084810204] [2019-11-23 20:11:56,294 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 20:11:56,372 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:11:56,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:56,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:56,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:11:56,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:56,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:11:56,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477408088] [2019-11-23 20:11:56,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:56,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:56,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:56,424 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:11:56,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,489 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:11:56,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:56,489 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:11:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,490 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:11:56,490 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:11:56,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:11:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:11:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:11:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:11:56,500 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:11:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:56,500 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:11:56,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:11:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:11:56,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,502 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 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 20:11:56,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:56,706 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:11:56,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924629615] [2019-11-23 20:11:56,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:56,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924629615] [2019-11-23 20:11:56,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516844779] [2019-11-23 20:11:56,840 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 20:11:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:11:56,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:56,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:56,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:11:56,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836534612] [2019-11-23 20:11:56,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:11:56,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:11:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:11:56,947 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:11:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,993 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:11:56,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:56,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:11:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,995 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:11:56,995 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:11:56,997 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 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 20:11:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:11:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:11:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:11:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:11:57,011 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:11:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,012 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:11:57,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:11:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:11:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:11:57,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,014 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 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 20:11:57,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,215 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,215 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:11:57,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421030793] [2019-11-23 20:11:57,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:57,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421030793] [2019-11-23 20:11:57,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39374035] [2019-11-23 20:11:57,334 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 20:11:57,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:57,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:57,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:57,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:11:57,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880197774] [2019-11-23 20:11:57,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:57,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:57,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:57,445 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:11:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,480 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:11:57,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:11:57,481 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:11:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,482 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:11:57,482 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:11:57,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 20:11:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:11:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:11:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:11:57,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:11:57,488 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:11:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,489 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:11:57,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:11:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:11:57,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,490 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 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 20:11:57,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,695 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:11:57,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194270780] [2019-11-23 20:11:57,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:11:57,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194270780] [2019-11-23 20:11:57,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132968695] [2019-11-23 20:11:57,825 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 20:11:57,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:11:57,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:57,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:11:57,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:11:57,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631674541] [2019-11-23 20:11:57,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:11:57,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:11:57,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:11:57,966 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:11:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:58,042 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:11:58,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:11:58,043 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:11:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:58,044 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:11:58,045 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:11:58,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:11:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:11:58,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:11:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:11:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:11:58,055 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:11:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:58,055 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:11:58,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:11:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:11:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:11:58,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:58,056 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 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] [2019-11-23 20:11:58,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,257 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,258 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:11:58,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471586112] [2019-11-23 20:11:58,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:58,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471586112] [2019-11-23 20:11:58,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799390414] [2019-11-23 20:11:58,427 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 20:11:58,490 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:58,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:58,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:11:58,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:58,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:58,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:11:58,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866452809] [2019-11-23 20:11:58,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:11:58,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:58,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:11:58,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:11:58,515 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:11:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:58,557 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:11:58,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:11:58,558 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:11:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:58,559 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:11:58,559 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:11:58,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:11:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:11:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:11:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:11:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:11:58,565 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:11:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:58,565 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:11:58,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:11:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:11:58,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:11:58,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:58,567 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 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] [2019-11-23 20:11:58,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,770 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:11:58,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599962394] [2019-11-23 20:11:58,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:58,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599962394] [2019-11-23 20:11:58,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689257352] [2019-11-23 20:11:58,922 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 20:11:59,347 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:11:59,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:59,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:11:59,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:59,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:59,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:11:59,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051712992] [2019-11-23 20:11:59,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:11:59,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:11:59,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:11:59,373 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 15 states. [2019-11-23 20:11:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:59,433 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-11-23 20:11:59,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:11:59,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-11-23 20:11:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:59,434 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:11:59,434 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:11:59,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:11:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:11:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 20:11:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:11:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2019-11-23 20:11:59,441 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2019-11-23 20:11:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:59,441 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2019-11-23 20:11:59,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:11:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2019-11-23 20:11:59,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:11:59,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:59,442 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 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] [2019-11-23 20:11:59,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,656 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash 581786172, now seen corresponding path program 12 times [2019-11-23 20:11:59,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:59,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357848597] [2019-11-23 20:11:59,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:11:59,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357848597] [2019-11-23 20:11:59,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674889070] [2019-11-23 20:11:59,810 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 20:12:00,087 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:12:00,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:00,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:12:00,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-23 20:12:00,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:00,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:12:00,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496510001] [2019-11-23 20:12:00,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:12:00,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:00,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:12:00,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:12:00,195 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 20 states. [2019-11-23 20:12:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:00,290 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2019-11-23 20:12:00,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:12:00,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 73 [2019-11-23 20:12:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:00,291 INFO L225 Difference]: With dead ends: 127 [2019-11-23 20:12:00,292 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:12:00,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:12:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:12:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-11-23 20:12:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:12:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-11-23 20:12:00,297 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 73 [2019-11-23 20:12:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:00,297 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-11-23 20:12:00,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:12:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-11-23 20:12:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:12:00,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:00,298 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:00,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,503 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:00,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 13 times [2019-11-23 20:12:00,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:00,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766167596] [2019-11-23 20:12:00,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,654 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:12:00,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766167596] [2019-11-23 20:12:00,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965808113] [2019-11-23 20:12:00,655 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 20:12:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:12:00,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:12:00,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:00,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:12:00,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156437139] [2019-11-23 20:12:00,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:12:00,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:00,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:12:00,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:12:00,785 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2019-11-23 20:12:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:00,836 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2019-11-23 20:12:00,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:12:00,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2019-11-23 20:12:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:00,837 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:12:00,837 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:12:00,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 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 20:12:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:12:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-23 20:12:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:12:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:12:00,842 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2019-11-23 20:12:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:00,843 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:12:00,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:12:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:12:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:12:00,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:00,844 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:01,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,049 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:01,049 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 14 times [2019-11-23 20:12:01,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:01,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811013751] [2019-11-23 20:12:01,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:12:01,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811013751] [2019-11-23 20:12:01,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43743489] [2019-11-23 20:12:01,216 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 20:12:01,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:01,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:01,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:12:01,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:12:01,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:01,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:12:01,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849428241] [2019-11-23 20:12:01,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:12:01,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:12:01,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:12:01,330 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 18 states. [2019-11-23 20:12:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:01,398 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-23 20:12:01,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:12:01,399 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-11-23 20:12:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:01,399 INFO L225 Difference]: With dead ends: 132 [2019-11-23 20:12:01,400 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:12:01,400 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 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 20:12:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:12:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-23 20:12:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:12:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2019-11-23 20:12:01,404 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2019-11-23 20:12:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:01,404 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2019-11-23 20:12:01,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:12:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2019-11-23 20:12:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:12:01,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:01,405 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:01,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,608 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:01,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:01,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2074246028, now seen corresponding path program 15 times [2019-11-23 20:12:01,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:01,611 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181395721] [2019-11-23 20:12:01,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:12:01,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181395721] [2019-11-23 20:12:01,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445752061] [2019-11-23 20:12:01,790 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 20:12:01,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:12:01,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:01,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:12:01,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:12:01,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:01,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-11-23 20:12:01,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362622364] [2019-11-23 20:12:01,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:12:01,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:12:01,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:01,994 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 25 states. [2019-11-23 20:12:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:02,268 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2019-11-23 20:12:02,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:12:02,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-11-23 20:12:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:02,270 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:12:02,270 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:12:02,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:12:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:12:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2019-11-23 20:12:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:12:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:12:02,276 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 81 [2019-11-23 20:12:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:02,276 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:12:02,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:12:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:12:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:12:02,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:02,278 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 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 20:12:02,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:02,482 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:02,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 16 times [2019-11-23 20:12:02,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:02,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789656237] [2019-11-23 20:12:02,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:02,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789656237] [2019-11-23 20:12:02,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412305783] [2019-11-23 20:12:02,731 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 20:12:02,801 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:02,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:02,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:02,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-23 20:12:02,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:02,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2019-11-23 20:12:02,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125383559] [2019-11-23 20:12:02,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:12:02,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:12:02,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:12:02,888 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2019-11-23 20:12:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:02,981 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-23 20:12:02,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:12:02,981 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2019-11-23 20:12:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:02,982 INFO L225 Difference]: With dead ends: 153 [2019-11-23 20:12:02,983 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:12:02,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:12:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:12:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2019-11-23 20:12:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:12:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2019-11-23 20:12:02,990 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 91 [2019-11-23 20:12:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:02,990 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2019-11-23 20:12:02,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:12:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2019-11-23 20:12:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:12:02,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:02,992 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 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 20:12:03,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:03,195 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:03,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1149733546, now seen corresponding path program 17 times [2019-11-23 20:12:03,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:03,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461515174] [2019-11-23 20:12:03,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:12:03,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461515174] [2019-11-23 20:12:03,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471083684] [2019-11-23 20:12:03,477 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 20:12:04,508 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 20:12:04,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:04,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:04,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2019-11-23 20:12:04,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:04,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-11-23 20:12:04,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468937553] [2019-11-23 20:12:04,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:12:04,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:12:04,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:04,643 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 27 states. [2019-11-23 20:12:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:04,886 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2019-11-23 20:12:04,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:12:04,887 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 95 [2019-11-23 20:12:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:04,888 INFO L225 Difference]: With dead ends: 165 [2019-11-23 20:12:04,888 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 20:12:04,889 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 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 20:12:04,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 20:12:04,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2019-11-23 20:12:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:12:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2019-11-23 20:12:04,894 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 95 [2019-11-23 20:12:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:04,894 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2019-11-23 20:12:04,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:12:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2019-11-23 20:12:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 20:12:04,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:04,895 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 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 20:12:05,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:05,096 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:05,097 INFO L82 PathProgramCache]: Analyzing trace with hash 668839014, now seen corresponding path program 18 times [2019-11-23 20:12:05,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:05,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780652446] [2019-11-23 20:12:05,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:12:05,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780652446] [2019-11-23 20:12:05,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46691482] [2019-11-23 20:12:05,355 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 20:12:06,176 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:12:06,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:06,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:12:06,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-11-23 20:12:06,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:06,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2019-11-23 20:12:06,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410504391] [2019-11-23 20:12:06,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:12:06,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:12:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:12:06,273 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2019-11-23 20:12:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:06,527 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2019-11-23 20:12:06,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:12:06,528 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2019-11-23 20:12:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:06,528 INFO L225 Difference]: With dead ends: 179 [2019-11-23 20:12:06,529 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:12:06,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:12:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:12:06,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2019-11-23 20:12:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:12:06,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:12:06,533 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2019-11-23 20:12:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:06,534 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:12:06,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:12:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:12:06,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:12:06,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:06,534 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:06,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:06,735 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1920176930, now seen corresponding path program 19 times [2019-11-23 20:12:06,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:06,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782421270] [2019-11-23 20:12:06,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:07,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782421270] [2019-11-23 20:12:07,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348920896] [2019-11-23 20:12:07,031 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 20:12:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:07,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:12:07,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:07,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:07,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:12:07,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80031248] [2019-11-23 20:12:07,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:07,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:07,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:07,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:07,137 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 24 states. [2019-11-23 20:12:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:07,209 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2019-11-23 20:12:07,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:12:07,211 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2019-11-23 20:12:07,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:07,212 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:12:07,212 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:12:07,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 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 20:12:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:12:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:12:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:12:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:12:07,217 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:12:07,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:07,218 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:12:07,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:12:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:12:07,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:07,219 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:07,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,423 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash -704384544, now seen corresponding path program 20 times [2019-11-23 20:12:07,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:07,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853294249] [2019-11-23 20:12:07,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:07,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853294249] [2019-11-23 20:12:07,750 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610671922] [2019-11-23 20:12:07,750 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 20:12:07,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:07,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:07,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:12:07,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:07,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:07,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:12:07,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406137630] [2019-11-23 20:12:07,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:12:07,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:12:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:07,932 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 25 states. [2019-11-23 20:12:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:08,001 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:12:08,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:12:08,002 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2019-11-23 20:12:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:08,003 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:12:08,003 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:12:08,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:12:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:12:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:12:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:12:08,009 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:12:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:08,010 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:12:08,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:12:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:12:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:12:08,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:08,011 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:08,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:08,215 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1762158306, now seen corresponding path program 21 times [2019-11-23 20:12:08,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:08,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731219689] [2019-11-23 20:12:08,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:08,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731219689] [2019-11-23 20:12:08,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564059867] [2019-11-23 20:12:08,646 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 20:12:08,834 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:12:08,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:08,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:12:08,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2019-11-23 20:12:09,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:09,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-23 20:12:09,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691292732] [2019-11-23 20:12:09,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:12:09,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:09,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:12:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:09,024 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 20:12:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:09,164 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2019-11-23 20:12:09,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:12:09,165 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 20:12:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:09,166 INFO L225 Difference]: With dead ends: 191 [2019-11-23 20:12:09,166 INFO L226 Difference]: Without dead ends: 122 [2019-11-23 20:12:09,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-23 20:12:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2019-11-23 20:12:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:12:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2019-11-23 20:12:09,171 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 115 [2019-11-23 20:12:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:09,172 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2019-11-23 20:12:09,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:12:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2019-11-23 20:12:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:12:09,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:09,173 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:09,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:09,374 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:09,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 22 times [2019-11-23 20:12:09,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:09,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357685493] [2019-11-23 20:12:09,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:09,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357685493] [2019-11-23 20:12:09,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039898805] [2019-11-23 20:12:09,826 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 20:12:09,933 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:09,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:09,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:12:09,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:09,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:09,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:12:09,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450068411] [2019-11-23 20:12:09,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:12:09,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:09,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:12:09,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:09,972 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 27 states. [2019-11-23 20:12:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:10,050 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2019-11-23 20:12:10,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:12:10,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 119 [2019-11-23 20:12:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:10,051 INFO L225 Difference]: With dead ends: 194 [2019-11-23 20:12:10,052 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:12:10,052 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:12:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-11-23 20:12:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 20:12:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2019-11-23 20:12:10,057 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2019-11-23 20:12:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:10,057 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2019-11-23 20:12:10,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:12:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2019-11-23 20:12:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 20:12:10,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:10,058 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:10,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:10,262 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:10,263 INFO L82 PathProgramCache]: Analyzing trace with hash 26792216, now seen corresponding path program 23 times [2019-11-23 20:12:10,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:10,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853284192] [2019-11-23 20:12:10,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:10,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853284192] [2019-11-23 20:12:10,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912012741] [2019-11-23 20:12:10,719 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 20:12:12,193 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 20:12:12,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:12,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:12:12,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:12,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:12,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:12:12,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102971765] [2019-11-23 20:12:12,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:12:12,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:12,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:12:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:12,241 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 28 states. [2019-11-23 20:12:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:12,327 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2019-11-23 20:12:12,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:12:12,327 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 121 [2019-11-23 20:12:12,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:12,328 INFO L225 Difference]: With dead ends: 196 [2019-11-23 20:12:12,328 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:12:12,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:12:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-11-23 20:12:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:12:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 20:12:12,334 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2019-11-23 20:12:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:12,334 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 20:12:12,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:12:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 20:12:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:12:12,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:12,335 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:12,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:12,542 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:12,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1400350122, now seen corresponding path program 24 times [2019-11-23 20:12:12,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:12,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929667503] [2019-11-23 20:12:12,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:12,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929667503] [2019-11-23 20:12:12,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449719098] [2019-11-23 20:12:12,992 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 20:12:13,482 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:12:13,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:13,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:12:13,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2019-11-23 20:12:13,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:13,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13] total 39 [2019-11-23 20:12:13,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911021275] [2019-11-23 20:12:13,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:12:13,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:13,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:12:13,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1043, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:12:13,750 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 39 states. [2019-11-23 20:12:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:15,047 INFO L93 Difference]: Finished difference Result 208 states and 220 transitions. [2019-11-23 20:12:15,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:12:15,048 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 123 [2019-11-23 20:12:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:15,049 INFO L225 Difference]: With dead ends: 208 [2019-11-23 20:12:15,049 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:12:15,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 20:12:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:12:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2019-11-23 20:12:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:12:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:12:15,056 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 123 [2019-11-23 20:12:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:15,056 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:12:15,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:12:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:12:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:12:15,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:15,057 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:15,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:15,262 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:15,263 INFO L82 PathProgramCache]: Analyzing trace with hash 328643792, now seen corresponding path program 25 times [2019-11-23 20:12:15,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:15,264 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191978319] [2019-11-23 20:12:15,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:15,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191978319] [2019-11-23 20:12:15,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945137331] [2019-11-23 20:12:15,704 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 20:12:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:15,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:12:15,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:15,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:15,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:12:15,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734927479] [2019-11-23 20:12:15,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:12:15,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:15,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:12:15,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:12:15,827 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 31 states. [2019-11-23 20:12:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:15,903 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2019-11-23 20:12:15,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:12:15,903 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 133 [2019-11-23 20:12:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:15,904 INFO L225 Difference]: With dead ends: 214 [2019-11-23 20:12:15,904 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:12:15,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 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 20:12:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:12:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-11-23 20:12:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:12:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 20:12:15,910 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2019-11-23 20:12:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:15,910 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 20:12:15,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:12:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 20:12:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:12:15,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:15,912 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:16,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:16,113 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:16,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1304669938, now seen corresponding path program 26 times [2019-11-23 20:12:16,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:16,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318747986] [2019-11-23 20:12:16,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:16,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318747986] [2019-11-23 20:12:16,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450405320] [2019-11-23 20:12:16,783 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 20:12:16,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:16,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:16,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:12:16,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:17,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:17,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:12:17,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872260302] [2019-11-23 20:12:17,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:12:17,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:12:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:17,044 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 32 states. [2019-11-23 20:12:17,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:17,179 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-11-23 20:12:17,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:12:17,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2019-11-23 20:12:17,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:17,181 INFO L225 Difference]: With dead ends: 216 [2019-11-23 20:12:17,181 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:12:17,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:12:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:12:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 20:12:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:12:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:12:17,192 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2019-11-23 20:12:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:17,192 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:12:17,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:12:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:12:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:12:17,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:17,194 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:17,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:17,399 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:17,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1038865868, now seen corresponding path program 27 times [2019-11-23 20:12:17,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:17,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938870397] [2019-11-23 20:12:17,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:17,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938870397] [2019-11-23 20:12:17,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392270480] [2019-11-23 20:12:17,843 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 20:12:17,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:12:17,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:17,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:12:17,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 72 proven. 49 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-11-23 20:12:18,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:18,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 14] total 44 [2019-11-23 20:12:18,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2426822] [2019-11-23 20:12:18,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:12:18,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:18,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:12:18,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=1282, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:12:18,246 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 44 states. [2019-11-23 20:12:18,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:18,835 INFO L93 Difference]: Finished difference Result 222 states and 232 transitions. [2019-11-23 20:12:18,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:12:18,836 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 137 [2019-11-23 20:12:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:18,837 INFO L225 Difference]: With dead ends: 222 [2019-11-23 20:12:18,837 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 20:12:18,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=724, Invalid=2138, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:12:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 20:12:18,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-11-23 20:12:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-23 20:12:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2019-11-23 20:12:18,845 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 137 [2019-11-23 20:12:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:18,845 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2019-11-23 20:12:18,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:12:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2019-11-23 20:12:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 20:12:18,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:18,847 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:19,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:19,051 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash 962487622, now seen corresponding path program 28 times [2019-11-23 20:12:19,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:19,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370017925] [2019-11-23 20:12:19,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:19,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370017925] [2019-11-23 20:12:19,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117542828] [2019-11-23 20:12:19,527 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 20:12:19,623 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:19,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:19,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:12:19,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1217 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:19,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:19,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:12:19,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538051340] [2019-11-23 20:12:19,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:12:19,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:19,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:12:19,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:19,653 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 35 states. [2019-11-23 20:12:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:19,771 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2019-11-23 20:12:19,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:12:19,772 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 143 [2019-11-23 20:12:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:19,773 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:12:19,773 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:12:19,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:12:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2019-11-23 20:12:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:12:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:12:19,780 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 143 [2019-11-23 20:12:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:19,780 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:12:19,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:12:19,781 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:12:19,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:12:19,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:19,782 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:19,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:19,986 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:19,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:19,986 INFO L82 PathProgramCache]: Analyzing trace with hash -99333116, now seen corresponding path program 29 times [2019-11-23 20:12:19,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:19,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73110881] [2019-11-23 20:12:19,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:20,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73110881] [2019-11-23 20:12:20,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510802284] [2019-11-23 20:12:20,636 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 20:12:46,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-11-23 20:12:46,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:46,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:12:46,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:46,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:46,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:12:46,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946429850] [2019-11-23 20:12:46,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:12:46,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:12:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:46,099 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 36 states. [2019-11-23 20:12:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:46,214 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2019-11-23 20:12:46,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:12:46,215 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 145 [2019-11-23 20:12:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:46,216 INFO L225 Difference]: With dead ends: 228 [2019-11-23 20:12:46,216 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:12:46,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:12:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:12:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:12:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:12:46,225 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:12:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:46,225 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:12:46,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:12:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:12:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:12:46,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:46,226 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:46,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:46,440 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1693154114, now seen corresponding path program 30 times [2019-11-23 20:12:46,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:46,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355861859] [2019-11-23 20:12:46,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:47,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355861859] [2019-11-23 20:12:47,070 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734116090] [2019-11-23 20:12:47,070 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 20:12:48,694 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:12:48,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:48,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:12:48,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1345 backedges. 65 proven. 64 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2019-11-23 20:12:48,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:48,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2019-11-23 20:12:48,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312312019] [2019-11-23 20:12:48,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:12:48,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:48,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:12:48,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:12:48,952 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 47 states. [2019-11-23 20:12:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:49,488 INFO L93 Difference]: Finished difference Result 240 states and 252 transitions. [2019-11-23 20:12:49,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:12:49,489 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 147 [2019-11-23 20:12:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:49,491 INFO L225 Difference]: With dead ends: 240 [2019-11-23 20:12:49,491 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:12:49,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=865, Invalid=2215, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:12:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:12:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2019-11-23 20:12:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 20:12:49,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2019-11-23 20:12:49,500 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 147 [2019-11-23 20:12:49,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:49,500 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2019-11-23 20:12:49,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:12:49,501 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2019-11-23 20:12:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 20:12:49,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:49,502 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 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 20:12:49,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:49,707 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:49,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:49,707 INFO L82 PathProgramCache]: Analyzing trace with hash -14377028, now seen corresponding path program 31 times [2019-11-23 20:12:49,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:49,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760590576] [2019-11-23 20:12:49,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:50,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760590576] [2019-11-23 20:12:50,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558749782] [2019-11-23 20:12:50,336 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 20:12:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:50,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:12:50,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:50,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:50,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:12:50,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227435003] [2019-11-23 20:12:50,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:12:50,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:50,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:12:50,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:12:50,474 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 39 states. [2019-11-23 20:12:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:50,598 INFO L93 Difference]: Finished difference Result 246 states and 254 transitions. [2019-11-23 20:12:50,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:12:50,599 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 157 [2019-11-23 20:12:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:50,600 INFO L225 Difference]: With dead ends: 246 [2019-11-23 20:12:50,600 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:12:50,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 157 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 20:12:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:12:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-23 20:12:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:12:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:12:50,607 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2019-11-23 20:12:50,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:50,607 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:12:50,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:12:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:12:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:12:50,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:50,608 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 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 20:12:50,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:50,809 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1318526470, now seen corresponding path program 32 times [2019-11-23 20:12:50,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:50,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184327036] [2019-11-23 20:12:50,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:51,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184327036] [2019-11-23 20:12:51,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154018348] [2019-11-23 20:12:51,600 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 20:12:51,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:51,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:51,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:12:51,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:51,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:51,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:12:51,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584744050] [2019-11-23 20:12:51,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:12:51,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:12:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:12:51,738 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 40 states. [2019-11-23 20:12:51,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:51,888 INFO L93 Difference]: Finished difference Result 248 states and 256 transitions. [2019-11-23 20:12:51,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:12:51,889 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 159 [2019-11-23 20:12:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:51,890 INFO L225 Difference]: With dead ends: 248 [2019-11-23 20:12:51,890 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:12:51,891 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:12:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:12:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:12:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:12:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:12:51,897 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:12:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:51,897 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:12:51,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:12:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:12:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:12:51,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:51,898 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 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 20:12:52,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:52,104 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:52,104 INFO L82 PathProgramCache]: Analyzing trace with hash -475689800, now seen corresponding path program 33 times [2019-11-23 20:12:52,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:52,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482368095] [2019-11-23 20:12:52,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:52,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482368095] [2019-11-23 20:12:52,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242212831] [2019-11-23 20:12:52,852 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 20:12:53,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:12:53,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:53,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:12:53,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1676 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1612 trivial. 0 not checked. [2019-11-23 20:12:53,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:53,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 11] total 49 [2019-11-23 20:12:53,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344741345] [2019-11-23 20:12:53,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:12:53,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:12:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:53,225 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 49 states. [2019-11-23 20:12:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:53,423 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2019-11-23 20:12:53,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:12:53,427 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 161 [2019-11-23 20:12:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:53,428 INFO L225 Difference]: With dead ends: 253 [2019-11-23 20:12:53,428 INFO L226 Difference]: Without dead ends: 168 [2019-11-23 20:12:53,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-23 20:12:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2019-11-23 20:12:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-23 20:12:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2019-11-23 20:12:53,434 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 161 [2019-11-23 20:12:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:53,435 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2019-11-23 20:12:53,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:12:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2019-11-23 20:12:53,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-23 20:12:53,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:53,436 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:53,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:53,640 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1565829364, now seen corresponding path program 34 times [2019-11-23 20:12:53,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:53,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694665313] [2019-11-23 20:12:53,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:12:54,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694665313] [2019-11-23 20:12:54,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593235958] [2019-11-23 20:12:54,319 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 20:12:54,427 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:54,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:54,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:54,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1768 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1687 trivial. 0 not checked. [2019-11-23 20:12:54,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:54,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 12] total 51 [2019-11-23 20:12:54,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704311804] [2019-11-23 20:12:54,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:12:54,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:54,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:12:54,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=1665, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:12:54,715 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 51 states. [2019-11-23 20:12:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:55,093 INFO L93 Difference]: Finished difference Result 265 states and 276 transitions. [2019-11-23 20:12:55,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:12:55,095 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 165 [2019-11-23 20:12:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:55,096 INFO L225 Difference]: With dead ends: 265 [2019-11-23 20:12:55,096 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 20:12:55,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=885, Invalid=1665, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:12:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 20:12:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2019-11-23 20:12:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-23 20:12:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2019-11-23 20:12:55,103 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 165 [2019-11-23 20:12:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:55,103 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2019-11-23 20:12:55,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:12:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2019-11-23 20:12:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 20:12:55,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:55,105 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 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 20:12:55,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:55,306 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:55,306 INFO L82 PathProgramCache]: Analyzing trace with hash -495906384, now seen corresponding path program 35 times [2019-11-23 20:12:55,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:55,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604088089] [2019-11-23 20:12:55,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:56,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604088089] [2019-11-23 20:12:56,000 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627326050] [2019-11-23 20:12:56,000 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 20:12:59,139 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-11-23 20:12:59,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:59,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:59,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2019-11-23 20:12:59,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:59,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 12] total 52 [2019-11-23 20:12:59,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079900373] [2019-11-23 20:12:59,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:12:59,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:59,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:12:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=1726, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:12:59,465 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 52 states. [2019-11-23 20:12:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:59,711 INFO L93 Difference]: Finished difference Result 273 states and 282 transitions. [2019-11-23 20:12:59,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:12:59,712 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 173 [2019-11-23 20:12:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:59,713 INFO L225 Difference]: With dead ends: 273 [2019-11-23 20:12:59,713 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 20:12:59,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=926, Invalid=1726, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:12:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 20:12:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2019-11-23 20:12:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 20:12:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2019-11-23 20:12:59,719 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 173 [2019-11-23 20:12:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:59,720 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2019-11-23 20:12:59,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:12:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2019-11-23 20:12:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-23 20:12:59,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:59,721 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 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 20:12:59,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:59,926 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash 979768044, now seen corresponding path program 36 times [2019-11-23 20:12:59,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:59,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930378631] [2019-11-23 20:12:59,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:13:00,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930378631] [2019-11-23 20:13:00,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585939078] [2019-11-23 20:13:00,732 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 20:13:02,990 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:13:02,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:02,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:13:02,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2000 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1900 trivial. 0 not checked. [2019-11-23 20:13:03,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:03,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 13] total 54 [2019-11-23 20:13:03,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903777592] [2019-11-23 20:13:03,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:13:03,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:03,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:13:03,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=980, Invalid=1882, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:13:03,245 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 54 states. [2019-11-23 20:13:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:03,644 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-11-23 20:13:03,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:13:03,645 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 177 [2019-11-23 20:13:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:03,646 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:13:03,646 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 20:13:03,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=1882, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:13:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 20:13:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2019-11-23 20:13:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 20:13:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2019-11-23 20:13:03,651 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 177 [2019-11-23 20:13:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:03,652 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2019-11-23 20:13:03,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:13:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2019-11-23 20:13:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 20:13:03,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:03,653 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 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 20:13:03,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:03,853 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1388424280, now seen corresponding path program 37 times [2019-11-23 20:13:03,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:03,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55280867] [2019-11-23 20:13:03,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2144 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:13:04,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55280867] [2019-11-23 20:13:04,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620574551] [2019-11-23 20:13:04,616 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 20:13:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:04,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:13:04,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2144 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:13:04,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:04,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 20:13:04,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080674086] [2019-11-23 20:13:04,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:13:04,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:04,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:13:04,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:13:04,776 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 45 states. [2019-11-23 20:13:04,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:04,930 INFO L93 Difference]: Finished difference Result 290 states and 298 transitions. [2019-11-23 20:13:04,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:13:04,932 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 185 [2019-11-23 20:13:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:04,933 INFO L225 Difference]: With dead ends: 290 [2019-11-23 20:13:04,933 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 20:13:04,934 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 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 20:13:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 20:13:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-23 20:13:04,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:13:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 20:13:04,940 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2019-11-23 20:13:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:04,940 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 20:13:04,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:13:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 20:13:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 20:13:04,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:04,941 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 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 20:13:05,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:05,145 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1413157658, now seen corresponding path program 38 times [2019-11-23 20:13:05,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:05,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9942194] [2019-11-23 20:13:05,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2227 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:13:05,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9942194] [2019-11-23 20:13:05,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882226557] [2019-11-23 20:13:05,931 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 20:13:06,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:06,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:06,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 20:13:06,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2227 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:13:06,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:06,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-11-23 20:13:06,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297473661] [2019-11-23 20:13:06,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:13:06,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:13:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:13:06,099 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 46 states. [2019-11-23 20:13:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:06,233 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2019-11-23 20:13:06,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:13:06,234 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 187 [2019-11-23 20:13:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:06,235 INFO L225 Difference]: With dead ends: 292 [2019-11-23 20:13:06,235 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 20:13:06,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:13:06,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 20:13:06,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-11-23 20:13:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 20:13:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2019-11-23 20:13:06,242 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2019-11-23 20:13:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:06,242 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2019-11-23 20:13:06,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:13:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2019-11-23 20:13:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 20:13:06,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:06,244 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 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 20:13:06,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:06,447 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:06,448 INFO L82 PathProgramCache]: Analyzing trace with hash 587869860, now seen corresponding path program 39 times [2019-11-23 20:13:06,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:06,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727509468] [2019-11-23 20:13:06,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:13:07,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727509468] [2019-11-23 20:13:07,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607078351] [2019-11-23 20:13:07,237 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 20:13:07,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:13:07,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:07,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:13:07,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2212 trivial. 0 not checked. [2019-11-23 20:13:07,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:07,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 13] total 57 [2019-11-23 20:13:07,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138035114] [2019-11-23 20:13:07,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 20:13:07,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:07,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 20:13:07,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1112, Invalid=2080, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:13:07,985 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 57 states. [2019-11-23 20:13:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:08,365 INFO L93 Difference]: Finished difference Result 297 states and 306 transitions. [2019-11-23 20:13:08,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 20:13:08,366 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 189 [2019-11-23 20:13:08,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:08,367 INFO L225 Difference]: With dead ends: 297 [2019-11-23 20:13:08,367 INFO L226 Difference]: Without dead ends: 196 [2019-11-23 20:13:08,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1112, Invalid=2080, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:13:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-11-23 20:13:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2019-11-23 20:13:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-23 20:13:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2019-11-23 20:13:08,376 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 189 [2019-11-23 20:13:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:08,376 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2019-11-23 20:13:08,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 20:13:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2019-11-23 20:13:08,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-23 20:13:08,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:08,378 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 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 20:13:08,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:08,585 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:08,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash 13334240, now seen corresponding path program 40 times [2019-11-23 20:13:08,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:08,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23579773] [2019-11-23 20:13:08,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-23 20:13:09,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23579773] [2019-11-23 20:13:09,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376225184] [2019-11-23 20:13:09,453 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 20:13:09,573 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:09,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:09,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:13:09,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2299 trivial. 0 not checked. [2019-11-23 20:13:09,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:09,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 14] total 59 [2019-11-23 20:13:09,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155733859] [2019-11-23 20:13:09,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-23 20:13:09,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:09,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-23 20:13:09,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1171, Invalid=2251, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:13:09,874 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 59 states. [2019-11-23 20:13:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:10,166 INFO L93 Difference]: Finished difference Result 303 states and 312 transitions. [2019-11-23 20:13:10,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-23 20:13:10,167 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 193 [2019-11-23 20:13:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:10,168 INFO L225 Difference]: With dead ends: 303 [2019-11-23 20:13:10,169 INFO L226 Difference]: Without dead ends: 200 [2019-11-23 20:13:10,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1171, Invalid=2251, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:13:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-23 20:13:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2019-11-23 20:13:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-11-23 20:13:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2019-11-23 20:13:10,175 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 193 [2019-11-23 20:13:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:10,175 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2019-11-23 20:13:10,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-23 20:13:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2019-11-23 20:13:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-23 20:13:10,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:10,177 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 12, 12, 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 20:13:10,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:10,381 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1432883484, now seen corresponding path program 41 times [2019-11-23 20:13:10,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:10,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929566407] [2019-11-23 20:13:10,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-11-23 20:13:11,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929566407] [2019-11-23 20:13:11,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021256844] [2019-11-23 20:13:11,348 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