/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/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:16:46,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:16:46,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:16:46,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:16:46,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:16:46,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:16:46,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:16:46,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:16:46,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:16:46,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:16:46,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:16:46,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:16:46,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:16:46,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:16:46,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:16:46,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:16:46,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:16:46,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:16:46,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:16:46,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:16:46,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:16:46,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:16:46,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:16:46,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:16:46,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:16:46,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:16:46,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:16:46,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:16:46,778 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 20:16:46,795 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:16:46,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:16:46,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:16:46,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:16:46,797 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:16:46,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:16:46,798 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:16:46,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:16:46,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:16:46,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:16:46,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:16:46,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:16:46,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:16:46,799 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:16:46,799 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:16:46,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:16:46,800 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:16:46,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:16:46,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:16:46,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:16:46,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:16:46,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:16:46,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:16:46,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:16:46,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:16:46,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:16:46,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:16:46,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:16:46,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:16:46,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:16:47,063 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:16:47,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:16:47,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:16:47,093 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:16:47,093 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:16:47,094 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2019-11-23 20:16:47,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60cfdc427/6fa154ea72534e9f9d3fb1a82e135f46/FLAG9db93998e [2019-11-23 20:16:47,603 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:16:47,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2019-11-23 20:16:47,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60cfdc427/6fa154ea72534e9f9d3fb1a82e135f46/FLAG9db93998e [2019-11-23 20:16:47,973 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60cfdc427/6fa154ea72534e9f9d3fb1a82e135f46 [2019-11-23 20:16:47,982 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:16:47,983 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:16:47,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:16:47,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:16:47,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:16:47,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:16:47" (1/1) ... [2019-11-23 20:16:47,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442b69e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:47, skipping insertion in model container [2019-11-23 20:16:47,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:16:47" (1/1) ... [2019-11-23 20:16:47,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:16:48,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:16:48,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:16:48,252 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:16:48,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:16:48,286 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:16:48,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48 WrapperNode [2019-11-23 20:16:48,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:16:48,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:16:48,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:16:48,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:16:48,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:16:48,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:16:48,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:16:48,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:16:48,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (1/1) ... [2019-11-23 20:16:48,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:16:48,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:16:48,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:16:48,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:16:48,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (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 20:16:48,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:16:48,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:16:48,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:16:48,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:16:48,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:16:48,760 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:16:48,761 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:16:48,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:16:48 BoogieIcfgContainer [2019-11-23 20:16:48,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:16:48,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:16:48,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:16:48,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:16:48,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:16:47" (1/3) ... [2019-11-23 20:16:48,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370dedcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:16:48, skipping insertion in model container [2019-11-23 20:16:48,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:16:48" (2/3) ... [2019-11-23 20:16:48,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370dedcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:16:48, skipping insertion in model container [2019-11-23 20:16:48,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:16:48" (3/3) ... [2019-11-23 20:16:48,787 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2019-11-23 20:16:48,807 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:16:48,814 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:16:48,834 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:16:48,859 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:16:48,859 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:16:48,860 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:16:48,860 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:16:48,860 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:16:48,860 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:16:48,860 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:16:48,860 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:16:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-23 20:16:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:16:48,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:48,880 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:48,880 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:48,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:48,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2019-11-23 20:16:48,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:48,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414071239] [2019-11-23 20:16:48,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:49,006 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 20:16:49,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414071239] [2019-11-23 20:16:49,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:49,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:16:49,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36734366] [2019-11-23 20:16:49,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:16:49,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:16:49,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:16:49,027 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-23 20:16:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:49,043 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2019-11-23 20:16:49,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:16:49,045 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-23 20:16:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:49,052 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:16:49,053 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:16:49,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:16:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:16:49,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:16:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:16:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 20:16:49,086 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2019-11-23 20:16:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:49,086 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 20:16:49,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:16:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 20:16:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:16:49,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:49,088 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:49,088 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:49,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2019-11-23 20:16:49,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:49,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137101774] [2019-11-23 20:16:49,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:49,187 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 20:16:49,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137101774] [2019-11-23 20:16:49,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:49,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:16:49,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156966431] [2019-11-23 20:16:49,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:16:49,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:49,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:16:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:49,194 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2019-11-23 20:16:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:49,264 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2019-11-23 20:16:49,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:16:49,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:16:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:49,267 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:16:49,267 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:16:49,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:16:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:16:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:16:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:16:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:16:49,276 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2019-11-23 20:16:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:49,277 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:16:49,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:16:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:16:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:16:49,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:49,278 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 20:16:49,279 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:49,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1458205426, now seen corresponding path program 1 times [2019-11-23 20:16:49,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:49,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286050577] [2019-11-23 20:16:49,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:49,335 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 20:16:49,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286050577] [2019-11-23 20:16:49,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:49,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:16:49,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914154935] [2019-11-23 20:16:49,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:16:49,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:49,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:16:49,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:16:49,338 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 3 states. [2019-11-23 20:16:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:49,418 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-23 20:16:49,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:16:49,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:16:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:49,421 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:16:49,421 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:16:49,422 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 20:16:49,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:16:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 20:16:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:16:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 20:16:49,432 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-11-23 20:16:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:49,432 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 20:16:49,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:16:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 20:16:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:16:49,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:49,435 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 20:16:49,435 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash 477186736, now seen corresponding path program 1 times [2019-11-23 20:16:49,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:49,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198104741] [2019-11-23 20:16:49,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:16:49,511 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198104741] [2019-11-23 20:16:49,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:16:49,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:16:49,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898423872] [2019-11-23 20:16:49,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:16:49,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:16:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:49,517 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 4 states. [2019-11-23 20:16:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:49,620 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2019-11-23 20:16:49,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:16:49,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:16:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:49,621 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:16:49,621 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:16:49,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:16:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:16:49,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-23 20:16:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:16:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 20:16:49,628 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2019-11-23 20:16:49,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:49,629 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 20:16:49,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:16:49,629 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 20:16:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:16:49,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:49,630 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 20:16:49,630 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:49,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:49,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2019-11-23 20:16:49,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:49,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072448213] [2019-11-23 20:16:49,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:49,687 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 20:16:49,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072448213] [2019-11-23 20:16:49,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015142508] [2019-11-23 20:16:49,688 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 20:16:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:49,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:16:49,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:49,817 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 20:16:49,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:49,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:16:49,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927578397] [2019-11-23 20:16:49,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:16:49,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:16:49,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:16:49,825 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-11-23 20:16:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:49,931 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2019-11-23 20:16:49,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:16:49,931 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-23 20:16:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:49,932 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:16:49,932 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:16:49,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:16:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:16:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:16:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:16:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:16:49,938 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:16:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:49,939 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:16:49,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:16:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:16:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:16:49,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:49,940 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] [2019-11-23 20:16:50,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:50,145 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:50,146 INFO L82 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2019-11-23 20:16:50,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:50,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670621076] [2019-11-23 20:16:50,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:50,212 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 20:16:50,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670621076] [2019-11-23 20:16:50,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786038496] [2019-11-23 20:16:50,213 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 20:16:50,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:16:50,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:50,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:16:50,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:50,311 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 20:16:50,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:50,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:16:50,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068171037] [2019-11-23 20:16:50,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:16:50,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:16:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:16:50,314 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2019-11-23 20:16:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:50,442 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2019-11-23 20:16:50,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:16:50,443 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-23 20:16:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:50,444 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:16:50,444 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:16:50,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:16:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:16:50,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2019-11-23 20:16:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:16:50,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-23 20:16:50,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2019-11-23 20:16:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:50,458 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-23 20:16:50,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:16:50,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-23 20:16:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:16:50,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:50,462 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:50,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:50,663 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:50,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2019-11-23 20:16:50,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:50,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392850387] [2019-11-23 20:16:50,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:52,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392850387] [2019-11-23 20:16:52,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484122702] [2019-11-23 20:16:52,016 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 20:16:52,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:16:52,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:52,073 WARN L253 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-23 20:16:52,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:53,840 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:53,841 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:16:53,842 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:16:53,855 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:53,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:53,861 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:16:53,862 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-11-23 20:16:53,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:54,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:54,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:54,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:54,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 49 [2019-11-23 20:16:54,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585571233] [2019-11-23 20:16:54,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:16:54,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:54,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:16:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:16:54,164 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 49 states. [2019-11-23 20:16:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:57,560 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-23 20:16:57,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:16:57,561 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 35 [2019-11-23 20:16:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:57,563 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:16:57,563 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:16:57,566 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=338, Invalid=4774, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:16:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:16:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2019-11-23 20:16:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:16:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-23 20:16:57,575 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2019-11-23 20:16:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:57,576 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-23 20:16:57,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:16:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-23 20:16:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:16:57,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:57,577 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:57,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:57,781 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:57,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2019-11-23 20:16:57,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:57,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656562087] [2019-11-23 20:16:57,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:16:57,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656562087] [2019-11-23 20:16:57,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822896608] [2019-11-23 20:16:57,856 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 20:16:57,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:16:57,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:57,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:16:57,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:16:57,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:57,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:16:57,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508411880] [2019-11-23 20:16:57,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:16:57,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:16:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:16:57,987 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 13 states. [2019-11-23 20:16:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:58,238 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2019-11-23 20:16:58,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:16:58,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2019-11-23 20:16:58,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:58,241 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:16:58,241 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:16:58,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:16:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:16:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2019-11-23 20:16:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:16:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-23 20:16:58,263 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2019-11-23 20:16:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:58,263 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-23 20:16:58,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:16:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-23 20:16:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:16:58,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:58,269 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:58,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:58,470 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:58,470 INFO L82 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2019-11-23 20:16:58,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:58,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573190107] [2019-11-23 20:16:58,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:16:58,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573190107] [2019-11-23 20:16:58,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931710294] [2019-11-23 20:16:58,540 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 20:16:58,606 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:16:58,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:58,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:16:58,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:16:58,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:58,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:16:58,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946157851] [2019-11-23 20:16:58,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:16:58,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:58,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:16:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:16:58,674 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 13 states. [2019-11-23 20:16:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:58,918 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2019-11-23 20:16:58,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:16:58,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-23 20:16:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:58,919 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:16:58,920 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:16:58,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:16:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:16:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-11-23 20:16:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:16:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-23 20:16:58,927 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2019-11-23 20:16:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:58,927 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-23 20:16:58,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:16:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-23 20:16:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:16:58,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:58,928 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:59,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:59,133 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2019-11-23 20:16:59,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:59,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728770417] [2019-11-23 20:16:59,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:00,473 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2019-11-23 20:17:00,656 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2019-11-23 20:17:00,814 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2019-11-23 20:17:01,185 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2019-11-23 20:17:01,378 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-11-23 20:17:01,579 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-11-23 20:17:01,774 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-11-23 20:17:02,008 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-11-23 20:17:02,185 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2019-11-23 20:17:02,460 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2019-11-23 20:17:02,890 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2019-11-23 20:17:03,084 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-11-23 20:17:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:04,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728770417] [2019-11-23 20:17:04,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541406244] [2019-11-23 20:17:04,012 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 20:17:04,065 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:17:04,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:04,067 WARN L253 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 68 conjunts are in the unsatisfiable core [2019-11-23 20:17:04,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:04,126 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:17:04,126 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:04,136 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:04,136 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:04,136 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:17:04,244 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:04,245 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-23 20:17:04,246 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:04,253 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:04,254 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:04,254 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2019-11-23 20:17:05,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:05,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:05,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 30] total 66 [2019-11-23 20:17:05,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937002512] [2019-11-23 20:17:05,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-11-23 20:17:05,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:05,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-11-23 20:17:05,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3957, Unknown=0, NotChecked=0, Total=4290 [2019-11-23 20:17:05,843 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 66 states. [2019-11-23 20:17:06,511 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2019-11-23 20:17:06,928 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2019-11-23 20:17:07,690 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 39 [2019-11-23 20:17:08,555 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2019-11-23 20:17:12,621 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2019-11-23 20:17:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:12,643 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2019-11-23 20:17:12,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:17:12,645 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 45 [2019-11-23 20:17:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:12,646 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:17:12,646 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:17:12,651 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=909, Invalid=9597, Unknown=0, NotChecked=0, Total=10506 [2019-11-23 20:17:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:17:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2019-11-23 20:17:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:17:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2019-11-23 20:17:12,672 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2019-11-23 20:17:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:12,673 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2019-11-23 20:17:12,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-11-23 20:17:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2019-11-23 20:17:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:17:12,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:12,677 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:12,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:12,882 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2019-11-23 20:17:12,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:12,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436700380] [2019-11-23 20:17:12,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:17:12,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436700380] [2019-11-23 20:17:12,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450406131] [2019-11-23 20:17:12,971 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 20:17:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:13,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:17:13,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:17:13,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:13,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:17:13,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724579326] [2019-11-23 20:17:13,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:17:13,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:13,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:17:13,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:17:13,111 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 16 states. [2019-11-23 20:17:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:13,384 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2019-11-23 20:17:13,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:17:13,385 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2019-11-23 20:17:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:13,386 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:17:13,386 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:17:13,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:17:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:17:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2019-11-23 20:17:13,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:17:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-23 20:17:13,397 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2019-11-23 20:17:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:13,398 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-23 20:17:13,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:17:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-23 20:17:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:17:13,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:13,399 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:13,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:13,603 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:13,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:13,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2019-11-23 20:17:13,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:13,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369839264] [2019-11-23 20:17:13,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:17:13,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369839264] [2019-11-23 20:17:13,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777571151] [2019-11-23 20:17:13,691 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 20:17:13,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:17:13,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:13,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:17:13,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:17:13,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:13,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:17:13,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027889704] [2019-11-23 20:17:13,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:17:13,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:17:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:17:13,814 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 16 states. [2019-11-23 20:17:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:14,121 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2019-11-23 20:17:14,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:17:14,121 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2019-11-23 20:17:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:14,123 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:17:14,123 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:17:14,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:17:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:17:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-11-23 20:17:14,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:17:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-11-23 20:17:14,131 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2019-11-23 20:17:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:14,132 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-11-23 20:17:14,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:17:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-11-23 20:17:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:17:14,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:14,133 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:14,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:14,338 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2019-11-23 20:17:14,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:14,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254328643] [2019-11-23 20:17:14,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:16,289 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2019-11-23 20:17:16,493 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2019-11-23 20:17:16,666 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-11-23 20:17:16,875 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-11-23 20:17:17,053 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-11-23 20:17:17,221 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-11-23 20:17:17,386 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2019-11-23 20:17:17,953 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2019-11-23 20:17:18,138 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2019-11-23 20:17:18,339 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2019-11-23 20:17:18,542 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-11-23 20:17:18,704 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2019-11-23 20:17:18,878 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2019-11-23 20:17:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:20,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254328643] [2019-11-23 20:17:20,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606445945] [2019-11-23 20:17:20,159 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 20:17:20,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:17:20,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:20,212 WARN L253 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-23 20:17:20,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:20,273 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:17:20,273 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:20,281 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:20,282 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:20,282 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:17:24,384 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:24,385 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:24,387 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:24,392 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:17:24,415 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:24,416 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 69 [2019-11-23 20:17:24,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,422 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:17:24,471 INFO L567 ElimStorePlain]: treesize reduction 90, result has 30.8 percent of original size [2019-11-23 20:17:24,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,473 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:17:24,473 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:65, output treesize:20 [2019-11-23 20:17:24,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:17:24,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:24,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 41] total 87 [2019-11-23 20:17:24,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224734041] [2019-11-23 20:17:24,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-11-23 20:17:24,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:24,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-11-23 20:17:24,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=6861, Unknown=0, NotChecked=0, Total=7482 [2019-11-23 20:17:24,873 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 87 states. [2019-11-23 20:17:27,611 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 41 [2019-11-23 20:17:28,485 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2019-11-23 20:17:28,804 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2019-11-23 20:17:29,136 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2019-11-23 20:17:30,305 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2019-11-23 20:17:31,948 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2019-11-23 20:17:32,288 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2019-11-23 20:17:32,639 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2019-11-23 20:17:32,952 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2019-11-23 20:17:33,874 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2019-11-23 20:17:34,175 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2019-11-23 20:17:35,301 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2019-11-23 20:17:35,636 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2019-11-23 20:17:35,995 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2019-11-23 20:17:36,344 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2019-11-23 20:17:36,685 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2019-11-23 20:17:37,784 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2019-11-23 20:17:38,118 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2019-11-23 20:17:38,462 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2019-11-23 20:17:38,807 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2019-11-23 20:17:39,115 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2019-11-23 20:17:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:39,643 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2019-11-23 20:17:39,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:17:39,643 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 55 [2019-11-23 20:17:39,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:39,644 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:17:39,644 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:17:39,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6156 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1735, Invalid=17171, Unknown=0, NotChecked=0, Total=18906 [2019-11-23 20:17:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:17:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2019-11-23 20:17:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:17:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2019-11-23 20:17:39,660 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2019-11-23 20:17:39,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:39,661 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2019-11-23 20:17:39,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-11-23 20:17:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2019-11-23 20:17:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:17:39,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:39,662 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:39,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:39,864 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:39,865 INFO L82 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2019-11-23 20:17:39,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:39,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832842279] [2019-11-23 20:17:39,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:17:39,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832842279] [2019-11-23 20:17:39,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880427392] [2019-11-23 20:17:39,977 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 20:17:40,020 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:17:40,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:40,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:17:40,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:17:40,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:40,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:17:40,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370632376] [2019-11-23 20:17:40,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:17:40,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:40,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:17:40,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:17:40,122 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 19 states. [2019-11-23 20:17:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:40,562 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2019-11-23 20:17:40,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:17:40,563 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2019-11-23 20:17:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:40,564 INFO L225 Difference]: With dead ends: 177 [2019-11-23 20:17:40,564 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:17:40,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:17:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:17:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2019-11-23 20:17:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:17:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-11-23 20:17:40,589 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2019-11-23 20:17:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:40,590 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-11-23 20:17:40,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:17:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-11-23 20:17:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:17:40,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:40,593 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:40,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:40,806 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:40,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:40,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2019-11-23 20:17:40,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:40,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526815398] [2019-11-23 20:17:40,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:17:40,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526815398] [2019-11-23 20:17:40,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775692012] [2019-11-23 20:17:40,975 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 20:17:41,204 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:17:41,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:41,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:17:41,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:17:41,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:41,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:17:41,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797966877] [2019-11-23 20:17:41,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:17:41,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:17:41,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:17:41,301 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 19 states. [2019-11-23 20:17:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:17:41,734 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2019-11-23 20:17:41,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:17:41,734 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2019-11-23 20:17:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:17:41,735 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:17:41,736 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:17:41,737 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:17:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:17:41,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-11-23 20:17:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:17:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:17:41,744 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2019-11-23 20:17:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:17:41,745 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:17:41,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:17:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:17:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:17:41,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:17:41,746 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:17:41,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:17:41,950 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:17:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:17:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2019-11-23 20:17:41,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:17:41,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931644856] [2019-11-23 20:17:41,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:17:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:17:43,182 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2019-11-23 20:17:43,391 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-11-23 20:17:43,626 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2019-11-23 20:17:43,860 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2019-11-23 20:17:44,094 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2019-11-23 20:17:44,346 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2019-11-23 20:17:44,608 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2019-11-23 20:17:44,865 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2019-11-23 20:17:45,060 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-11-23 20:17:45,255 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2019-11-23 20:17:45,457 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2019-11-23 20:17:45,620 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2019-11-23 20:17:45,910 WARN L192 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2019-11-23 20:17:46,220 WARN L192 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2019-11-23 20:17:46,554 WARN L192 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-11-23 20:17:46,906 WARN L192 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2019-11-23 20:17:47,193 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2019-11-23 20:17:47,504 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2019-11-23 20:17:47,708 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2019-11-23 20:17:47,946 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-11-23 20:17:48,145 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2019-11-23 20:17:48,306 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-11-23 20:17:48,500 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2019-11-23 20:17:48,747 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2019-11-23 20:17:48,969 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2019-11-23 20:17:49,201 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2019-11-23 20:17:49,420 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2019-11-23 20:17:49,638 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2019-11-23 20:17:49,849 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2019-11-23 20:17:50,071 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2019-11-23 20:17:50,259 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-11-23 20:17:50,460 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2019-11-23 20:17:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:17:52,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931644856] [2019-11-23 20:17:52,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127425585] [2019-11-23 20:17:52,370 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 20:17:52,422 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:17:52,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:17:52,424 WARN L253 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 100 conjunts are in the unsatisfiable core [2019-11-23 20:17:52,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:17:52,473 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:17:52,474 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:52,483 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:52,483 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:52,484 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:17:58,079 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:17:58,093 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:17:58,094 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-11-23 20:17:58,095 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:17:58,127 INFO L567 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2019-11-23 20:17:58,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:58,128 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:17:58,129 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:20 [2019-11-23 20:17:58,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:58,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:58,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:17:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:17:58,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:17:58,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 49] total 107 [2019-11-23 20:17:58,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583540850] [2019-11-23 20:17:58,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-11-23 20:17:58,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:17:58,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-11-23 20:17:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=10548, Unknown=0, NotChecked=0, Total=11342 [2019-11-23 20:17:58,579 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 107 states. [2019-11-23 20:18:01,628 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-11-23 20:18:02,073 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 43 [2019-11-23 20:18:02,699 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 45 [2019-11-23 20:18:03,079 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 45 [2019-11-23 20:18:03,455 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 52 [2019-11-23 20:18:03,812 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 54 [2019-11-23 20:18:04,194 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 51 [2019-11-23 20:18:04,625 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2019-11-23 20:18:05,029 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2019-11-23 20:18:05,419 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-11-23 20:18:05,744 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2019-11-23 20:18:06,145 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2019-11-23 20:18:06,570 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2019-11-23 20:18:07,371 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-11-23 20:18:07,712 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2019-11-23 20:18:08,071 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 67 [2019-11-23 20:18:08,629 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 68 [2019-11-23 20:18:09,077 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 83 [2019-11-23 20:18:09,461 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2019-11-23 20:18:09,842 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2019-11-23 20:18:10,218 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2019-11-23 20:18:10,624 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2019-11-23 20:18:10,973 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2019-11-23 20:18:11,385 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2019-11-23 20:18:11,801 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2019-11-23 20:18:12,472 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2019-11-23 20:18:12,743 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2019-11-23 20:18:13,154 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 73 [2019-11-23 20:18:13,565 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 77 [2019-11-23 20:18:14,039 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 85 [2019-11-23 20:18:14,496 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 81 [2019-11-23 20:18:15,352 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 82 [2019-11-23 20:18:15,834 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 88 [2019-11-23 20:18:16,265 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 84 [2019-11-23 20:18:16,634 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2019-11-23 20:18:17,171 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2019-11-23 20:18:17,893 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 62 [2019-11-23 20:18:18,266 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 66 [2019-11-23 20:18:18,647 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 69 [2019-11-23 20:18:19,035 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 71 [2019-11-23 20:18:19,830 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 53 [2019-11-23 20:18:20,192 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 53 [2019-11-23 20:18:20,552 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2019-11-23 20:18:21,093 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2019-11-23 20:18:21,450 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2019-11-23 20:18:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:21,480 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2019-11-23 20:18:21,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-11-23 20:18:21,481 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 65 [2019-11-23 20:18:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:21,482 INFO L225 Difference]: With dead ends: 123 [2019-11-23 20:18:21,482 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 20:18:21,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9603 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=2337, Invalid=27075, Unknown=0, NotChecked=0, Total=29412 [2019-11-23 20:18:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 20:18:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 95. [2019-11-23 20:18:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 20:18:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2019-11-23 20:18:21,493 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2019-11-23 20:18:21,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:21,494 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2019-11-23 20:18:21,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-11-23 20:18:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2019-11-23 20:18:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:18:21,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:21,495 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:21,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:21,696 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2019-11-23 20:18:21,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:21,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278407383] [2019-11-23 20:18:21,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:18:21,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278407383] [2019-11-23 20:18:21,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508224943] [2019-11-23 20:18:21,836 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 20:18:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:21,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:18:21,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:18:22,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:22,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 20:18:22,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093272846] [2019-11-23 20:18:22,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:18:22,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:22,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:18:22,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:22,003 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 22 states. [2019-11-23 20:18:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:22,411 INFO L93 Difference]: Finished difference Result 205 states and 220 transitions. [2019-11-23 20:18:22,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:18:22,412 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2019-11-23 20:18:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:22,413 INFO L225 Difference]: With dead ends: 205 [2019-11-23 20:18:22,413 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:18:22,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:18:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:18:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2019-11-23 20:18:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:18:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-11-23 20:18:22,425 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 67 [2019-11-23 20:18:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:22,425 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-11-23 20:18:22,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:18:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-11-23 20:18:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:18:22,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:22,426 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:22,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:22,629 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2014257346, now seen corresponding path program 14 times [2019-11-23 20:18:22,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:22,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259002727] [2019-11-23 20:18:22,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 20:18:22,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259002727] [2019-11-23 20:18:22,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771540732] [2019-11-23 20:18:22,763 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 20:18:22,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:22,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:22,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:18:22,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 20:18:22,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:22,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 20:18:22,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368853386] [2019-11-23 20:18:22,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:18:22,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:22,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:18:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:22,939 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 22 states. [2019-11-23 20:18:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:23,468 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2019-11-23 20:18:23,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:18:23,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2019-11-23 20:18:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:23,469 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:18:23,469 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:18:23,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:18:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:18:23,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2019-11-23 20:18:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:18:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2019-11-23 20:18:23,477 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2019-11-23 20:18:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:23,477 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2019-11-23 20:18:23,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:18:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2019-11-23 20:18:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:18:23,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:23,478 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:23,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:23,679 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2019-11-23 20:18:23,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:23,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406189000] [2019-11-23 20:18:23,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:24,967 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2019-11-23 20:18:25,109 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-11-23 20:18:25,302 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2019-11-23 20:18:25,510 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2019-11-23 20:18:25,755 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2019-11-23 20:18:26,001 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2019-11-23 20:18:26,210 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2019-11-23 20:18:26,424 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53