/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/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:12:08,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:12:08,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:12:08,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:12:08,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:12:08,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:12:08,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:12:08,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:12:08,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:12:08,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:12:08,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:12:08,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:12:08,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:12:08,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:12:08,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:12:08,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:12:08,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:12:08,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:12:08,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:12:08,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:12:08,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:12:08,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:12:08,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:12:08,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:12:08,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:12:08,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:12:08,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:12:08,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:12:08,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:12:08,817 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:12:08,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:12:08,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:12:08,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:12:08,820 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:12:08,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:12:08,820 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:12:08,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:12:08,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:12:08,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:12:08,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:12:08,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:12:08,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:12:08,823 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:12:08,823 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:12:08,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:12:08,823 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:12:08,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:12:08,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:12:08,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:12:08,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:12:08,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:12:08,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:12:08,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:12:08,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:12:08,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:12:08,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:12:08,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:12:08,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:12:08,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:12:09,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:12:09,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:12:09,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:12:09,126 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:12:09,127 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:12:09,128 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-11-23 22:12:09,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/024711aa1/6c84d9625396482196e238f005748d15/FLAGfa765fb15 [2019-11-23 22:12:09,664 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:12:09,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-11-23 22:12:09,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/024711aa1/6c84d9625396482196e238f005748d15/FLAGfa765fb15 [2019-11-23 22:12:10,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/024711aa1/6c84d9625396482196e238f005748d15 [2019-11-23 22:12:10,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:12:10,083 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:12:10,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:12:10,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:12:10,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:12:10,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af04add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10, skipping insertion in model container [2019-11-23 22:12:10,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:12:10,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:12:10,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:12:10,312 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:12:10,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:12:10,342 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:12:10,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10 WrapperNode [2019-11-23 22:12:10,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:12:10,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:12:10,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:12:10,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:12:10,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:12:10,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:12:10,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:12:10,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:12:10,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... [2019-11-23 22:12:10,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:12:10,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:12:10,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:12:10,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:12:10,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:12:10,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:12:10,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:12:10,687 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:12:10,688 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-23 22:12:10,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:12:10 BoogieIcfgContainer [2019-11-23 22:12:10,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:12:10,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:12:10,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:12:10,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:12:10,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:12:10" (1/3) ... [2019-11-23 22:12:10,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a1537f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:12:10, skipping insertion in model container [2019-11-23 22:12:10,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:10" (2/3) ... [2019-11-23 22:12:10,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33a1537f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:12:10, skipping insertion in model container [2019-11-23 22:12:10,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:12:10" (3/3) ... [2019-11-23 22:12:10,697 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-11-23 22:12:10,706 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:12:10,713 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:12:10,724 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:12:10,747 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:12:10,747 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:12:10,747 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:12:10,747 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:12:10,747 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:12:10,748 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:12:10,748 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:12:10,748 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:12:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:12:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:12:10,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:10,768 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:10,769 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:10,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908747, now seen corresponding path program 1 times [2019-11-23 22:12:10,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:10,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382736147] [2019-11-23 22:12:10,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:10,854 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:10,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193511739] [2019-11-23 22:12:10,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:10,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:12:10,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:11,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382736147] [2019-11-23 22:12:11,025 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:11,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193511739] [2019-11-23 22:12:11,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:12:11,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:12:11,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378257926] [2019-11-23 22:12:11,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:12:11,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:12:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:12:11,048 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2019-11-23 22:12:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:11,102 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2019-11-23 22:12:11,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:12:11,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 22:12:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:11,114 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:12:11,114 INFO L226 Difference]: Without dead ends: 9 [2019-11-23 22:12:11,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 22:12:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-23 22:12:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-23 22:12:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:12:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:12:11,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-11-23 22:12:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:11,149 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:12:11,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:12:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:12:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:12:11,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:11,151 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:11,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:11,353 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:11,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:11,354 INFO L82 PathProgramCache]: Analyzing trace with hash 179533835, now seen corresponding path program 1 times [2019-11-23 22:12:11,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:11,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221907098] [2019-11-23 22:12:11,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:11,364 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:11,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559514430] [2019-11-23 22:12:11,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:11,396 WARN L253 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:12:11,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:11,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:11,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221907098] [2019-11-23 22:12:11,501 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:11,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559514430] [2019-11-23 22:12:11,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:11,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:12:11,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392813586] [2019-11-23 22:12:11,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:12:11,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:11,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:12:11,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:12:11,508 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2019-11-23 22:12:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:11,572 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-23 22:12:11,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:12:11,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-23 22:12:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:11,574 INFO L225 Difference]: With dead ends: 13 [2019-11-23 22:12:11,574 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:12:11,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:12:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:12:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:12:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:12:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-23 22:12:11,579 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2019-11-23 22:12:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:11,579 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-23 22:12:11,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:12:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-23 22:12:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:12:11,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:11,581 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:11,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:11,784 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1270519115, now seen corresponding path program 2 times [2019-11-23 22:12:11,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:11,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251220498] [2019-11-23 22:12:11,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:11,798 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:11,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085130826] [2019-11-23 22:12:11,799 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:11,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:11,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:11,832 WARN L253 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:12:11,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:11,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:11,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251220498] [2019-11-23 22:12:11,912 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:11,913 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085130826] [2019-11-23 22:12:11,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:11,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:12:11,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967101484] [2019-11-23 22:12:11,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:12:11,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:12:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:12:11,915 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2019-11-23 22:12:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:11,974 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-23 22:12:11,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:12:11,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-23 22:12:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:11,975 INFO L225 Difference]: With dead ends: 14 [2019-11-23 22:12:11,975 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:12:11,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:12:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:12:11,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:12:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:12:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:12:11,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-11-23 22:12:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:11,980 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:12:11,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:12:11,981 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:12:11,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:12:11,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:11,981 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:12,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:12,190 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:12,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:12,191 INFO L82 PathProgramCache]: Analyzing trace with hash 731324427, now seen corresponding path program 3 times [2019-11-23 22:12:12,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:12,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102951157] [2019-11-23 22:12:12,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:12,207 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:12,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052062311] [2019-11-23 22:12:12,208 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:12,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:12:12,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:12,240 WARN L253 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:12:12,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:12,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:12,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102951157] [2019-11-23 22:12:12,320 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:12,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052062311] [2019-11-23 22:12:12,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:12,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:12:12,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296442641] [2019-11-23 22:12:12,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:12:12,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:12:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:12:12,323 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2019-11-23 22:12:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:12,434 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-23 22:12:12,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:12:12,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-23 22:12:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:12,435 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:12:12,435 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:12:12,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:12:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:12:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 22:12:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 22:12:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-23 22:12:12,439 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-23 22:12:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:12,440 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-23 22:12:12,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:12:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-23 22:12:12,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:12:12,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:12,444 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:12,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:12,645 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1196158283, now seen corresponding path program 4 times [2019-11-23 22:12:12,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:12,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896490150] [2019-11-23 22:12:12,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:12,657 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:12,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975270058] [2019-11-23 22:12:12,658 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:12,716 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:12,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:12,717 WARN L253 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:12:12,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:12,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:12,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896490150] [2019-11-23 22:12:12,820 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:12,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975270058] [2019-11-23 22:12:12,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:12,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:12:12,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922608171] [2019-11-23 22:12:12,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:12:12,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:12:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:12:12,823 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2019-11-23 22:12:12,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:12,903 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-23 22:12:12,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:12:12,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-23 22:12:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:12,905 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:12:12,905 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 22:12:12,906 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:12:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 22:12:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 22:12:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:12:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-23 22:12:12,914 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-11-23 22:12:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:12,915 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-23 22:12:12,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:12:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-23 22:12:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:12:12,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:12,917 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:13,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,120 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:13,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1573861365, now seen corresponding path program 5 times [2019-11-23 22:12:13,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:13,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566481396] [2019-11-23 22:12:13,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:13,132 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:13,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103715465] [2019-11-23 22:12:13,133 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,175 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:12:13,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:13,177 WARN L253 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:12:13,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:13,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:13,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566481396] [2019-11-23 22:12:13,282 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:13,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103715465] [2019-11-23 22:12:13,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:13,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:12:13,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851079720] [2019-11-23 22:12:13,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:12:13,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:13,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:12:13,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:12:13,284 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2019-11-23 22:12:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:13,362 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-11-23 22:12:13,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:12:13,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-11-23 22:12:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:13,363 INFO L225 Difference]: With dead ends: 17 [2019-11-23 22:12:13,363 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:12:13,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:12:13,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:12:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 22:12:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:12:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-11-23 22:12:13,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-11-23 22:12:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:13,369 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-11-23 22:12:13,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:12:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-11-23 22:12:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:12:13,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:13,370 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:13,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,578 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1545124533, now seen corresponding path program 6 times [2019-11-23 22:12:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:13,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969618926] [2019-11-23 22:12:13,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:13,596 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:13,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336651362] [2019-11-23 22:12:13,601 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,635 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 22:12:13,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:13,636 WARN L253 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:12:13,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:13,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:13,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969618926] [2019-11-23 22:12:13,741 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:13,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336651362] [2019-11-23 22:12:13,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:13,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:12:13,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235829325] [2019-11-23 22:12:13,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:12:13,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:13,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:12:13,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:12:13,745 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-11-23 22:12:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:13,831 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-23 22:12:13,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:12:13,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-23 22:12:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:13,832 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:12:13,833 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:12:13,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:12:13,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:12:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:12:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-23 22:12:13,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-11-23 22:12:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:13,838 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-23 22:12:13,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:12:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-23 22:12:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:12:13,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:13,839 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:14,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:14,046 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:14,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:14,047 INFO L82 PathProgramCache]: Analyzing trace with hash -654282741, now seen corresponding path program 7 times [2019-11-23 22:12:14,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:14,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933871745] [2019-11-23 22:12:14,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:14,073 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:14,073 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002781480] [2019-11-23 22:12:14,073 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:14,118 WARN L253 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:12:14,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:14,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:14,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933871745] [2019-11-23 22:12:14,259 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:14,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002781480] [2019-11-23 22:12:14,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:14,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:12:14,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119373745] [2019-11-23 22:12:14,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:12:14,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:12:14,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:14,261 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2019-11-23 22:12:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:14,363 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-23 22:12:14,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:12:14,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-11-23 22:12:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:14,364 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:12:14,365 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:12:14,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:12:14,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:12:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:12:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:12:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-11-23 22:12:14,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-11-23 22:12:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:14,371 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-11-23 22:12:14,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:12:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-11-23 22:12:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:12:14,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:14,372 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:14,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:14,574 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:14,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1192009035, now seen corresponding path program 8 times [2019-11-23 22:12:14,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:14,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776915480] [2019-11-23 22:12:14,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:14,586 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:14,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375104107] [2019-11-23 22:12:14,586 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:14,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:14,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:14,635 WARN L253 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:12:14,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:14,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:14,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776915480] [2019-11-23 22:12:14,762 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:14,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375104107] [2019-11-23 22:12:14,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:14,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:12:14,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463551640] [2019-11-23 22:12:14,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:12:14,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:12:14,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:12:14,764 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2019-11-23 22:12:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:14,924 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-23 22:12:14,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:12:14,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-11-23 22:12:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:14,926 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:12:14,926 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:12:14,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:12:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 22:12:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:12:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:12:14,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-11-23 22:12:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:14,931 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:12:14,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:12:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:12:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:12:14,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:14,932 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:15,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:15,140 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:15,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1702488053, now seen corresponding path program 9 times [2019-11-23 22:12:15,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:15,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422189209] [2019-11-23 22:12:15,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:15,150 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:15,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749049907] [2019-11-23 22:12:15,151 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:15,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:12:15,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:15,193 WARN L253 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 22:12:15,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:15,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:15,364 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 22:12:15,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422189209] [2019-11-23 22:12:15,365 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:15,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749049907] [2019-11-23 22:12:15,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:15,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:12:15,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107675923] [2019-11-23 22:12:15,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:12:15,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:12:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:15,367 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2019-11-23 22:12:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:15,529 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-23 22:12:15,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:12:15,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-23 22:12:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:15,530 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:12:15,530 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:12:15,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:12:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:12:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:12:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:12:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-23 22:12:15,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-11-23 22:12:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:15,536 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-23 22:12:15,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:12:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-23 22:12:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:12:15,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:15,537 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:15,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:15,744 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:15,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1237584565, now seen corresponding path program 10 times [2019-11-23 22:12:15,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:15,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113280691] [2019-11-23 22:12:15,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:15,756 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:15,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372348711] [2019-11-23 22:12:15,756 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:15,836 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:15,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:15,838 WARN L253 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-23 22:12:15,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:15,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:16,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113280691] [2019-11-23 22:12:16,021 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:16,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372348711] [2019-11-23 22:12:16,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:16,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:12:16,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317092830] [2019-11-23 22:12:16,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:12:16,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:16,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:12:16,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:12:16,023 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2019-11-23 22:12:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:16,169 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-11-23 22:12:16,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:12:16,170 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-23 22:12:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:16,170 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:12:16,171 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:12:16,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:12:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:12:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:12:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:12:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:12:16,176 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-11-23 22:12:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:16,176 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:12:16,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:12:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:12:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:12:16,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:16,177 INFO L410 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:16,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:16,381 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:16,381 INFO L82 PathProgramCache]: Analyzing trace with hash 289521675, now seen corresponding path program 11 times [2019-11-23 22:12:16,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:16,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894016943] [2019-11-23 22:12:16,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:16,399 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:16,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419609262] [2019-11-23 22:12:16,399 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:16,438 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 22:12:16,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:16,440 WARN L253 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 55 conjunts are in the unsatisfiable core [2019-11-23 22:12:16,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:16,586 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:16,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894016943] [2019-11-23 22:12:16,614 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:16,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419609262] [2019-11-23 22:12:16,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:16,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 22:12:16,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761014781] [2019-11-23 22:12:16,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:12:16,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:12:16,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:12:16,616 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 15 states. [2019-11-23 22:12:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:16,811 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-23 22:12:16,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:12:16,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-23 22:12:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:16,812 INFO L225 Difference]: With dead ends: 23 [2019-11-23 22:12:16,812 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:12:16,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:12:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:12:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 22:12:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 22:12:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-11-23 22:12:16,826 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-11-23 22:12:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:16,826 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-11-23 22:12:16,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:12:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-11-23 22:12:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:12:16,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:16,827 INFO L410 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:17,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,032 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash 385174859, now seen corresponding path program 12 times [2019-11-23 22:12:17,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:17,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937611235] [2019-11-23 22:12:17,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:17,043 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:17,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683478280] [2019-11-23 22:12:17,043 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,077 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:12:17,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:17,079 WARN L253 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-23 22:12:17,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:17,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:17,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937611235] [2019-11-23 22:12:17,302 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:17,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683478280] [2019-11-23 22:12:17,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:17,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:12:17,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780422360] [2019-11-23 22:12:17,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:12:17,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:17,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:12:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:12:17,304 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 16 states. [2019-11-23 22:12:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:17,500 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-11-23 22:12:17,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:12:17,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-11-23 22:12:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:17,502 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:12:17,502 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:12:17,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:12:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 22:12:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:12:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-23 22:12:17,508 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-11-23 22:12:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:17,508 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-23 22:12:17,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:12:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-23 22:12:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:12:17,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:17,509 INFO L410 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:17,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,710 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash -944543733, now seen corresponding path program 13 times [2019-11-23 22:12:17,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:17,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733713194] [2019-11-23 22:12:17,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:17,722 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:17,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240592505] [2019-11-23 22:12:17,722 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:17,770 WARN L253 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-23 22:12:17,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:17,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:17,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733713194] [2019-11-23 22:12:17,997 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:17,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240592505] [2019-11-23 22:12:17,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:17,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 22:12:17,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212370664] [2019-11-23 22:12:17,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:12:17,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:12:17,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:17,999 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 17 states. [2019-11-23 22:12:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:18,228 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-23 22:12:18,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:12:18,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-11-23 22:12:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:18,230 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:12:18,230 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:12:18,232 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:12:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:12:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:12:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:12:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-23 22:12:18,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-11-23 22:12:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:18,237 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-23 22:12:18,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:12:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-23 22:12:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:12:18,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:18,238 INFO L410 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:18,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:18,439 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:18,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash 783852875, now seen corresponding path program 14 times [2019-11-23 22:12:18,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:18,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112153320] [2019-11-23 22:12:18,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:18,451 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:18,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396973726] [2019-11-23 22:12:18,452 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:18,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:18,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:18,491 WARN L253 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 67 conjunts are in the unsatisfiable core [2019-11-23 22:12:18,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:18,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:18,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112153320] [2019-11-23 22:12:18,744 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:18,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396973726] [2019-11-23 22:12:18,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:18,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-23 22:12:18,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090271868] [2019-11-23 22:12:18,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:12:18,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:18,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:12:18,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:12:18,746 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 18 states. [2019-11-23 22:12:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:19,045 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-11-23 22:12:19,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:12:19,046 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2019-11-23 22:12:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:19,046 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:12:19,046 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:12:19,047 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:12:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:12:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:12:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:12:19,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-11-23 22:12:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:19,052 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:12:19,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:12:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:12:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:12:19,053 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:19,053 INFO L410 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:19,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:19,259 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1470427125, now seen corresponding path program 15 times [2019-11-23 22:12:19,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:19,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585635366] [2019-11-23 22:12:19,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:19,270 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:19,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628442745] [2019-11-23 22:12:19,271 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:19,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:12:19,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:19,352 WARN L253 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-23 22:12:19,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:19,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:19,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585635366] [2019-11-23 22:12:19,598 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:19,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628442745] [2019-11-23 22:12:19,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:19,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-23 22:12:19,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739759335] [2019-11-23 22:12:19,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:12:19,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:19,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:12:19,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:19,601 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 19 states. [2019-11-23 22:12:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:19,874 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-11-23 22:12:19,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:12:19,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-11-23 22:12:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:19,875 INFO L225 Difference]: With dead ends: 27 [2019-11-23 22:12:19,875 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 22:12:19,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:12:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 22:12:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 22:12:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:12:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-11-23 22:12:19,882 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-11-23 22:12:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:19,882 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-11-23 22:12:19,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:12:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-11-23 22:12:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:12:19,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:19,883 INFO L410 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:20,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:20,086 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1661336907, now seen corresponding path program 16 times [2019-11-23 22:12:20,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:20,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000428785] [2019-11-23 22:12:20,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:20,097 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:20,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344121485] [2019-11-23 22:12:20,098 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:20,218 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:20,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:20,219 WARN L253 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-23 22:12:20,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:20,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:20,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000428785] [2019-11-23 22:12:20,557 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:20,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344121485] [2019-11-23 22:12:20,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:20,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-11-23 22:12:20,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840841985] [2019-11-23 22:12:20,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:12:20,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:20,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:12:20,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:12:20,559 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 20 states. [2019-11-23 22:12:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:20,857 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-23 22:12:20,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:12:20,858 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-11-23 22:12:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:20,859 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:12:20,859 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:12:20,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:12:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:12:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:12:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:12:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-23 22:12:20,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-11-23 22:12:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:20,865 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-23 22:12:20,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:12:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-23 22:12:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:12:20,866 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:20,867 INFO L410 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:21,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:21,070 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:21,071 INFO L82 PathProgramCache]: Analyzing trace with hash -38225909, now seen corresponding path program 17 times [2019-11-23 22:12:21,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:21,071 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155764421] [2019-11-23 22:12:21,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:21,088 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:21,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864181379] [2019-11-23 22:12:21,091 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:21,131 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 22:12:21,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:21,132 WARN L253 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-23 22:12:21,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:21,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:21,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155764421] [2019-11-23 22:12:21,420 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:21,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864181379] [2019-11-23 22:12:21,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:21,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-11-23 22:12:21,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203461609] [2019-11-23 22:12:21,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:12:21,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:21,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:12:21,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:12:21,421 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 21 states. [2019-11-23 22:12:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:21,750 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-11-23 22:12:21,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:12:21,751 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2019-11-23 22:12:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:21,751 INFO L225 Difference]: With dead ends: 29 [2019-11-23 22:12:21,752 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:12:21,753 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:12:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:12:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:12:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:12:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-11-23 22:12:21,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-11-23 22:12:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:21,757 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-11-23 22:12:21,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:12:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-11-23 22:12:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:12:21,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:21,758 INFO L410 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:21,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:21,962 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1185065653, now seen corresponding path program 18 times [2019-11-23 22:12:21,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:21,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071950965] [2019-11-23 22:12:21,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:21,974 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:21,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213228669] [2019-11-23 22:12:21,974 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:22,021 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 22:12:22,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:22,023 WARN L253 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 83 conjunts are in the unsatisfiable core [2019-11-23 22:12:22,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:22,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:22,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071950965] [2019-11-23 22:12:22,310 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:22,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213228669] [2019-11-23 22:12:22,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:22,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-11-23 22:12:22,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762022811] [2019-11-23 22:12:22,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:12:22,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:12:22,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:12:22,312 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 22 states. [2019-11-23 22:12:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:22,663 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-23 22:12:22,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 22:12:22,663 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-11-23 22:12:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:22,664 INFO L225 Difference]: With dead ends: 30 [2019-11-23 22:12:22,664 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:12:22,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:12:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:12:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:12:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-23 22:12:22,669 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-11-23 22:12:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:22,670 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-23 22:12:22,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:12:22,670 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-23 22:12:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:12:22,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:22,671 INFO L410 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:22,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:22,874 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1917607947, now seen corresponding path program 19 times [2019-11-23 22:12:22,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:22,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212367066] [2019-11-23 22:12:22,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:22,883 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:22,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947374829] [2019-11-23 22:12:22,884 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:22,931 WARN L253 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-23 22:12:22,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:23,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:23,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212367066] [2019-11-23 22:12:23,265 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:23,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947374829] [2019-11-23 22:12:23,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:23,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-11-23 22:12:23,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307516313] [2019-11-23 22:12:23,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:12:23,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:12:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:23,267 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 23 states. [2019-11-23 22:12:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:23,666 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-23 22:12:23,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:12:23,666 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2019-11-23 22:12:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:23,667 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:12:23,667 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:12:23,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:12:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:12:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 22:12:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:12:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-11-23 22:12:23,672 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-11-23 22:12:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:23,672 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-11-23 22:12:23,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:12:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-11-23 22:12:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:12:23,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:23,673 INFO L410 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:23,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:23,876 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:23,877 INFO L82 PathProgramCache]: Analyzing trace with hash -683758261, now seen corresponding path program 20 times [2019-11-23 22:12:23,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:23,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941609776] [2019-11-23 22:12:23,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:23,887 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:23,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491494044] [2019-11-23 22:12:23,888 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:23,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:23,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:23,932 WARN L253 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 91 conjunts are in the unsatisfiable core [2019-11-23 22:12:23,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:24,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:24,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941609776] [2019-11-23 22:12:24,282 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:24,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491494044] [2019-11-23 22:12:24,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:24,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-11-23 22:12:24,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753109619] [2019-11-23 22:12:24,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 22:12:24,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 22:12:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:12:24,284 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 24 states. [2019-11-23 22:12:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:24,647 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-23 22:12:24,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:12:24,648 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2019-11-23 22:12:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:24,648 INFO L225 Difference]: With dead ends: 32 [2019-11-23 22:12:24,648 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:12:24,649 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:12:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:12:24,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:12:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:12:24,657 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-11-23 22:12:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:24,657 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:12:24,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 22:12:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:12:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:12:24,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:24,658 INFO L410 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:24,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:24,867 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:24,868 INFO L82 PathProgramCache]: Analyzing trace with hash 278267915, now seen corresponding path program 21 times [2019-11-23 22:12:24,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:24,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841158841] [2019-11-23 22:12:24,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:24,879 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:24,879 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968005193] [2019-11-23 22:12:24,879 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:25,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 22:12:25,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:25,014 WARN L253 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 95 conjunts are in the unsatisfiable core [2019-11-23 22:12:25,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:25,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:25,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841158841] [2019-11-23 22:12:25,383 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:25,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968005193] [2019-11-23 22:12:25,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:25,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-11-23 22:12:25,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078726652] [2019-11-23 22:12:25,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:12:25,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:25,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:12:25,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:25,385 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 25 states. [2019-11-23 22:12:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:25,931 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-23 22:12:25,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:12:25,933 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2019-11-23 22:12:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:25,934 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:12:25,934 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:12:25,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:12:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:12:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 22:12:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:12:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-11-23 22:12:25,941 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-11-23 22:12:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:25,941 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-11-23 22:12:25,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:12:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-11-23 22:12:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:12:25,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:25,942 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:26,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:26,145 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash 36308299, now seen corresponding path program 22 times [2019-11-23 22:12:26,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:26,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163628981] [2019-11-23 22:12:26,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:26,155 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:26,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901065069] [2019-11-23 22:12:26,155 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:26,326 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:26,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:26,328 WARN L253 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-23 22:12:26,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:26,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:26,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163628981] [2019-11-23 22:12:26,757 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:26,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901065069] [2019-11-23 22:12:26,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:26,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-11-23 22:12:26,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138516405] [2019-11-23 22:12:26,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:12:26,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:12:26,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:12:26,759 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 26 states. [2019-11-23 22:12:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:27,224 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-11-23 22:12:27,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:12:27,225 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2019-11-23 22:12:27,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:27,225 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:12:27,225 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:12:27,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:12:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:12:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 22:12:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:12:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-23 22:12:27,232 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-11-23 22:12:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:27,232 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-23 22:12:27,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:12:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-23 22:12:27,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:12:27,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:27,233 INFO L410 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:27,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:27,436 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1125494795, now seen corresponding path program 23 times [2019-11-23 22:12:27,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:27,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488102322] [2019-11-23 22:12:27,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:27,446 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:27,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769794000] [2019-11-23 22:12:27,446 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:27,502 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 22:12:27,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:27,504 WARN L253 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 103 conjunts are in the unsatisfiable core [2019-11-23 22:12:27,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:27,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:27,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488102322] [2019-11-23 22:12:27,926 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:27,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769794000] [2019-11-23 22:12:27,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:27,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-11-23 22:12:27,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473166980] [2019-11-23 22:12:27,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:12:27,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:27,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:12:27,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:12:27,928 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 27 states. [2019-11-23 22:12:28,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:28,454 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-11-23 22:12:28,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:12:28,455 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2019-11-23 22:12:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:28,455 INFO L225 Difference]: With dead ends: 35 [2019-11-23 22:12:28,456 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 22:12:28,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:12:28,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 22:12:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 22:12:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 22:12:28,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-11-23 22:12:28,461 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-11-23 22:12:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:28,462 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-11-23 22:12:28,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:12:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-11-23 22:12:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:12:28,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:28,463 INFO L410 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:28,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:28,663 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:28,664 INFO L82 PathProgramCache]: Analyzing trace with hash 530537803, now seen corresponding path program 24 times [2019-11-23 22:12:28,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:28,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10806552] [2019-11-23 22:12:28,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:28,674 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:28,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502014678] [2019-11-23 22:12:28,674 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:28,747 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:12:28,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:28,750 WARN L253 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-23 22:12:28,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:29,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:29,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10806552] [2019-11-23 22:12:29,160 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:29,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502014678] [2019-11-23 22:12:29,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:29,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-11-23 22:12:29,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325122603] [2019-11-23 22:12:29,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:12:29,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:29,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:12:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:12:29,162 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 28 states. [2019-11-23 22:12:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:29,720 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-11-23 22:12:29,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:12:29,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2019-11-23 22:12:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:29,721 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:12:29,721 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:12:29,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:12:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:12:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 22:12:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:12:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-23 22:12:29,726 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-11-23 22:12:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:29,727 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-23 22:12:29,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:12:29,727 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-23 22:12:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:12:29,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:29,728 INFO L410 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:29,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:29,930 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash -733259765, now seen corresponding path program 25 times [2019-11-23 22:12:29,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:29,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139333275] [2019-11-23 22:12:29,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:29,940 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:29,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343391888] [2019-11-23 22:12:29,940 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:30,000 WARN L253 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 111 conjunts are in the unsatisfiable core [2019-11-23 22:12:30,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:30,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:30,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139333275] [2019-11-23 22:12:30,429 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:30,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343391888] [2019-11-23 22:12:30,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:30,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-11-23 22:12:30,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033072786] [2019-11-23 22:12:30,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:12:30,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:30,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:12:30,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:12:30,431 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 29 states. [2019-11-23 22:12:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:31,018 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-11-23 22:12:31,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:12:31,018 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2019-11-23 22:12:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:31,019 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:12:31,019 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:12:31,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:12:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:12:31,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 22:12:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:12:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-11-23 22:12:31,025 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-11-23 22:12:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:31,025 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-11-23 22:12:31,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:12:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-11-23 22:12:31,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:12:31,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:31,026 INFO L410 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:31,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:31,230 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1256278709, now seen corresponding path program 26 times [2019-11-23 22:12:31,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:31,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83609491] [2019-11-23 22:12:31,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:31,240 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:31,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268666044] [2019-11-23 22:12:31,241 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:31,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:31,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:31,325 WARN L253 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 115 conjunts are in the unsatisfiable core [2019-11-23 22:12:31,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:31,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:31,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83609491] [2019-11-23 22:12:31,848 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:31,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268666044] [2019-11-23 22:12:31,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:31,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-11-23 22:12:31,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425733327] [2019-11-23 22:12:31,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:12:31,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:31,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:12:31,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:12:31,849 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 30 states. [2019-11-23 22:12:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:32,454 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-11-23 22:12:32,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:12:32,454 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2019-11-23 22:12:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:32,455 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:12:32,455 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:12:32,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:12:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:12:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 22:12:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:12:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-23 22:12:32,460 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-11-23 22:12:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:32,460 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-23 22:12:32,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:12:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-23 22:12:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:12:32,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:32,461 INFO L410 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:32,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:32,662 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:32,663 INFO L82 PathProgramCache]: Analyzing trace with hash -289996789, now seen corresponding path program 27 times [2019-11-23 22:12:32,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:32,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586514987] [2019-11-23 22:12:32,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:32,671 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:32,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787172975] [2019-11-23 22:12:32,671 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:32,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 22:12:32,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:32,959 WARN L253 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 119 conjunts are in the unsatisfiable core [2019-11-23 22:12:32,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:33,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:33,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586514987] [2019-11-23 22:12:33,467 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:33,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787172975] [2019-11-23 22:12:33,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:33,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-11-23 22:12:33,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069985737] [2019-11-23 22:12:33,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:12:33,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:33,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:12:33,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:12:33,468 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 31 states. [2019-11-23 22:12:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:34,107 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-11-23 22:12:34,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:12:34,108 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2019-11-23 22:12:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:34,108 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:12:34,108 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:12:34,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:12:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:12:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 22:12:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 22:12:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-11-23 22:12:34,115 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-11-23 22:12:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:34,115 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-11-23 22:12:34,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:12:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-11-23 22:12:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 22:12:34,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:34,116 INFO L410 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:34,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:34,317 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:34,317 INFO L82 PathProgramCache]: Analyzing trace with hash -400028341, now seen corresponding path program 28 times [2019-11-23 22:12:34,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:34,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734491890] [2019-11-23 22:12:34,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:34,326 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:34,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660406442] [2019-11-23 22:12:34,327 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:34,554 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:34,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:34,556 WARN L253 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 123 conjunts are in the unsatisfiable core [2019-11-23 22:12:34,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:35,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:35,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734491890] [2019-11-23 22:12:35,149 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:35,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660406442] [2019-11-23 22:12:35,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:35,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-11-23 22:12:35,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686754810] [2019-11-23 22:12:35,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:12:35,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:35,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:12:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:12:35,151 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 32 states. [2019-11-23 22:12:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:35,836 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-11-23 22:12:35,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:12:35,837 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2019-11-23 22:12:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:35,837 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:12:35,838 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:12:35,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:12:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:12:35,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-23 22:12:35,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:12:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-23 22:12:35,844 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-11-23 22:12:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:35,844 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-23 22:12:35,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:12:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-23 22:12:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:12:35,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:35,845 INFO L410 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:36,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:36,049 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash 483960843, now seen corresponding path program 29 times [2019-11-23 22:12:36,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:36,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698148075] [2019-11-23 22:12:36,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:36,057 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:36,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752240455] [2019-11-23 22:12:36,058 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:36,121 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 22:12:36,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:36,125 WARN L253 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 127 conjunts are in the unsatisfiable core [2019-11-23 22:12:36,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:36,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:36,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698148075] [2019-11-23 22:12:36,746 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:36,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752240455] [2019-11-23 22:12:36,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:36,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-11-23 22:12:36,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381829823] [2019-11-23 22:12:36,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:12:36,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:36,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:12:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:12:36,748 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 33 states. [2019-11-23 22:12:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:37,487 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-11-23 22:12:37,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:12:37,488 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2019-11-23 22:12:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:37,489 INFO L225 Difference]: With dead ends: 41 [2019-11-23 22:12:37,489 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 22:12:37,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:12:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 22:12:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 22:12:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:12:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-11-23 22:12:37,495 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-11-23 22:12:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:37,496 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-11-23 22:12:37,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:12:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-11-23 22:12:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:12:37,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:37,497 INFO L410 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:37,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:37,700 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2117821771, now seen corresponding path program 30 times [2019-11-23 22:12:37,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:37,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466112104] [2019-11-23 22:12:37,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:37,709 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:37,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999537680] [2019-11-23 22:12:37,710 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:37,853 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-23 22:12:37,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:37,858 WARN L253 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 131 conjunts are in the unsatisfiable core [2019-11-23 22:12:37,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:38,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:38,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466112104] [2019-11-23 22:12:38,496 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:38,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999537680] [2019-11-23 22:12:38,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:38,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-11-23 22:12:38,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407043516] [2019-11-23 22:12:38,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:12:38,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:38,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:12:38,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:12:38,497 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 34 states. [2019-11-23 22:12:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:39,290 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-23 22:12:39,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:12:39,290 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2019-11-23 22:12:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:39,290 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:12:39,290 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:12:39,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:12:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:12:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 22:12:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:12:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-23 22:12:39,296 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-11-23 22:12:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:39,297 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-23 22:12:39,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:12:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-23 22:12:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:12:39,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:39,297 INFO L410 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:39,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:39,501 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:39,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1227902987, now seen corresponding path program 31 times [2019-11-23 22:12:39,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:39,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487593990] [2019-11-23 22:12:39,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:39,510 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:39,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493860332] [2019-11-23 22:12:39,510 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:39,579 WARN L253 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 135 conjunts are in the unsatisfiable core [2019-11-23 22:12:39,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:40,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:40,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487593990] [2019-11-23 22:12:40,254 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:40,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493860332] [2019-11-23 22:12:40,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:40,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-11-23 22:12:40,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815864413] [2019-11-23 22:12:40,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:12:40,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:12:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:12:40,255 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 35 states. [2019-11-23 22:12:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:41,070 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-11-23 22:12:41,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:12:41,070 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2019-11-23 22:12:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:41,071 INFO L225 Difference]: With dead ends: 43 [2019-11-23 22:12:41,071 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:12:41,072 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:12:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:12:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-23 22:12:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 22:12:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-11-23 22:12:41,078 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-11-23 22:12:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:41,078 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-11-23 22:12:41,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:12:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-11-23 22:12:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:12:41,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:41,079 INFO L410 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:41,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:41,283 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:41,283 INFO L82 PathProgramCache]: Analyzing trace with hash -589775541, now seen corresponding path program 32 times [2019-11-23 22:12:41,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:41,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068101567] [2019-11-23 22:12:41,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:41,291 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:41,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137886372] [2019-11-23 22:12:41,292 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:41,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:41,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:41,361 WARN L253 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 139 conjunts are in the unsatisfiable core [2019-11-23 22:12:41,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:42,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:42,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068101567] [2019-11-23 22:12:42,060 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:42,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137886372] [2019-11-23 22:12:42,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:42,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-11-23 22:12:42,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817961754] [2019-11-23 22:12:42,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:12:42,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:12:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:12:42,062 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 36 states. [2019-11-23 22:12:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:42,928 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-11-23 22:12:42,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:12:42,928 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2019-11-23 22:12:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:42,929 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:12:42,929 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 22:12:42,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:12:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 22:12:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 22:12:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:12:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-23 22:12:42,935 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-11-23 22:12:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:42,935 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-23 22:12:42,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:12:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-23 22:12:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:12:42,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:42,936 INFO L410 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:43,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,137 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1103235061, now seen corresponding path program 33 times [2019-11-23 22:12:43,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:43,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437236875] [2019-11-23 22:12:43,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:43,145 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:43,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767450391] [2019-11-23 22:12:43,146 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 22:12:43,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:43,768 WARN L253 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 143 conjunts are in the unsatisfiable core [2019-11-23 22:12:43,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:44,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:44,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437236875] [2019-11-23 22:12:44,529 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:44,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767450391] [2019-11-23 22:12:44,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:44,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-11-23 22:12:44,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364280637] [2019-11-23 22:12:44,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:12:44,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:44,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:12:44,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:12:44,530 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 37 states. [2019-11-23 22:12:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:45,473 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-11-23 22:12:45,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:12:45,474 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2019-11-23 22:12:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:45,474 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:12:45,475 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:12:45,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:12:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:12:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 22:12:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:12:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-11-23 22:12:45,480 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-11-23 22:12:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:45,480 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-11-23 22:12:45,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:12:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-11-23 22:12:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:12:45,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:45,480 INFO L410 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:45,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:45,682 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:45,682 INFO L82 PathProgramCache]: Analyzing trace with hash 159389003, now seen corresponding path program 34 times [2019-11-23 22:12:45,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:45,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190044373] [2019-11-23 22:12:45,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:45,690 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:45,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397750221] [2019-11-23 22:12:45,691 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:46,320 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:46,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:46,324 WARN L253 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 147 conjunts are in the unsatisfiable core [2019-11-23 22:12:46,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:47,097 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:47,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190044373] [2019-11-23 22:12:47,135 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:47,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397750221] [2019-11-23 22:12:47,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:47,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-11-23 22:12:47,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515555918] [2019-11-23 22:12:47,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 22:12:47,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:47,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 22:12:47,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:12:47,137 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 38 states. [2019-11-23 22:12:48,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:48,144 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-11-23 22:12:48,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:12:48,144 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2019-11-23 22:12:48,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:48,144 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:12:48,144 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:12:48,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:12:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:12:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 22:12:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:12:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-11-23 22:12:48,151 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-11-23 22:12:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:48,151 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-11-23 22:12:48,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 22:12:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-11-23 22:12:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:12:48,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:48,152 INFO L410 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:48,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:48,356 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 646029323, now seen corresponding path program 35 times [2019-11-23 22:12:48,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:48,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067901317] [2019-11-23 22:12:48,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:48,365 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:48,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618197523] [2019-11-23 22:12:48,365 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:48,455 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 22:12:48,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:48,458 WARN L253 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 151 conjunts are in the unsatisfiable core [2019-11-23 22:12:48,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:49,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:49,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067901317] [2019-11-23 22:12:49,201 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:49,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618197523] [2019-11-23 22:12:49,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:49,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-11-23 22:12:49,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429747767] [2019-11-23 22:12:49,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:12:49,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:12:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:12:49,203 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 39 states. [2019-11-23 22:12:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:50,238 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-11-23 22:12:50,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:12:50,238 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2019-11-23 22:12:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:50,239 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:12:50,239 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 22:12:50,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:12:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 22:12:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 22:12:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 22:12:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-11-23 22:12:50,244 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-11-23 22:12:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:50,244 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-11-23 22:12:50,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:12:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-11-23 22:12:50,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:12:50,245 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:50,245 INFO L410 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:50,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:50,446 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1447989941, now seen corresponding path program 36 times [2019-11-23 22:12:50,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:50,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041952528] [2019-11-23 22:12:50,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:50,455 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:50,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575365830] [2019-11-23 22:12:50,455 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:50,875 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:12:50,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:50,879 WARN L253 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 155 conjunts are in the unsatisfiable core [2019-11-23 22:12:50,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:51,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:51,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041952528] [2019-11-23 22:12:51,796 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:51,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575365830] [2019-11-23 22:12:51,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:51,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-11-23 22:12:51,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473469294] [2019-11-23 22:12:51,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:12:51,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:51,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:12:51,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:12:51,798 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 40 states. [2019-11-23 22:12:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:52,911 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-11-23 22:12:52,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:12:52,912 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2019-11-23 22:12:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:52,912 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:12:52,913 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:12:52,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:12:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:12:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-23 22:12:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:12:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-11-23 22:12:52,919 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-11-23 22:12:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:52,919 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-11-23 22:12:52,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:12:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-11-23 22:12:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:12:52,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:52,920 INFO L410 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:53,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:53,121 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1938077685, now seen corresponding path program 37 times [2019-11-23 22:12:53,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:53,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867354710] [2019-11-23 22:12:53,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:53,129 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:53,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668743900] [2019-11-23 22:12:53,130 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:53,199 WARN L253 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 159 conjunts are in the unsatisfiable core [2019-11-23 22:12:53,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:54,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:54,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867354710] [2019-11-23 22:12:54,233 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:54,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668743900] [2019-11-23 22:12:54,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:54,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-11-23 22:12:54,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218616256] [2019-11-23 22:12:54,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:12:54,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:12:54,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:12:54,235 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 41 states. [2019-11-23 22:12:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:55,394 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-11-23 22:12:55,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:12:55,394 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2019-11-23 22:12:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:55,395 INFO L225 Difference]: With dead ends: 49 [2019-11-23 22:12:55,395 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:12:55,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:12:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:12:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-23 22:12:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 22:12:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-11-23 22:12:55,400 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-11-23 22:12:55,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:55,400 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-11-23 22:12:55,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:12:55,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-11-23 22:12:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 22:12:55,401 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:55,401 INFO L410 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:55,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:55,602 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:55,602 INFO L82 PathProgramCache]: Analyzing trace with hash 49071435, now seen corresponding path program 38 times [2019-11-23 22:12:55,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:55,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639206861] [2019-11-23 22:12:55,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:55,613 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:55,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322905858] [2019-11-23 22:12:55,613 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:55,686 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:55,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:55,689 WARN L253 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 163 conjunts are in the unsatisfiable core [2019-11-23 22:12:55,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:56,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:56,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639206861] [2019-11-23 22:12:56,566 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:56,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322905858] [2019-11-23 22:12:56,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:56,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-11-23 22:12:56,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580907339] [2019-11-23 22:12:56,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 22:12:56,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 22:12:56,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 22:12:56,568 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 42 states. [2019-11-23 22:12:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:57,771 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-11-23 22:12:57,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:12:57,771 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2019-11-23 22:12:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:57,772 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:12:57,772 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:12:57,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:12:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:12:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 22:12:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:12:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-23 22:12:57,777 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-11-23 22:12:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:57,777 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-23 22:12:57,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 22:12:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-23 22:12:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:12:57,778 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:57,778 INFO L410 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:57,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:57,979 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:57,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:57,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1521152011, now seen corresponding path program 39 times [2019-11-23 22:12:57,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:57,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535416783] [2019-11-23 22:12:57,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:57,987 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:57,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244617433] [2019-11-23 22:12:57,988 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:59,235 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 22:12:59,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:59,238 WARN L253 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 167 conjunts are in the unsatisfiable core [2019-11-23 22:12:59,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:00,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:00,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535416783] [2019-11-23 22:13:00,169 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:00,169 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244617433] [2019-11-23 22:13:00,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:00,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-11-23 22:13:00,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673452292] [2019-11-23 22:13:00,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:13:00,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:00,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:13:00,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:13:00,171 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 43 states. [2019-11-23 22:13:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:01,411 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-11-23 22:13:01,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:13:01,411 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2019-11-23 22:13:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:01,412 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:13:01,412 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 22:13:01,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:13:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 22:13:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 22:13:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 22:13:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-11-23 22:13:01,418 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-11-23 22:13:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:01,419 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-11-23 22:13:01,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:13:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-11-23 22:13:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 22:13:01,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:01,420 INFO L410 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:01,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:01,623 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:01,624 INFO L82 PathProgramCache]: Analyzing trace with hash -88990389, now seen corresponding path program 40 times [2019-11-23 22:13:01,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:01,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638551225] [2019-11-23 22:13:01,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:01,632 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:01,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587769950] [2019-11-23 22:13:01,632 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:02,404 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:02,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:02,407 WARN L253 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 171 conjunts are in the unsatisfiable core [2019-11-23 22:13:02,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:03,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:03,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638551225] [2019-11-23 22:13:03,359 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:03,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587769950] [2019-11-23 22:13:03,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:03,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-11-23 22:13:03,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875579732] [2019-11-23 22:13:03,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:13:03,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:13:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:13:03,361 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 44 states. [2019-11-23 22:13:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:04,641 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-11-23 22:13:04,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 22:13:04,641 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2019-11-23 22:13:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:04,642 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:13:04,642 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 22:13:04,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:13:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 22:13:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-23 22:13:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:13:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-23 22:13:04,648 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-11-23 22:13:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:04,648 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-23 22:13:04,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:13:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-23 22:13:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 22:13:04,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:04,649 INFO L410 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:04,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:04,853 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:04,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1536202763, now seen corresponding path program 41 times [2019-11-23 22:13:04,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:04,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138537008] [2019-11-23 22:13:04,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:04,862 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:04,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696131540] [2019-11-23 22:13:04,862 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:04,958 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-11-23 22:13:04,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:04,961 WARN L253 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 175 conjunts are in the unsatisfiable core [2019-11-23 22:13:04,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:05,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:06,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138537008] [2019-11-23 22:13:06,001 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:06,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696131540] [2019-11-23 22:13:06,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:06,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-11-23 22:13:06,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407655373] [2019-11-23 22:13:06,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:13:06,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:06,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:13:06,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:13:06,003 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 45 states. [2019-11-23 22:13:07,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:07,354 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-11-23 22:13:07,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:13:07,355 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 48 [2019-11-23 22:13:07,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:07,355 INFO L225 Difference]: With dead ends: 53 [2019-11-23 22:13:07,355 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:13:07,356 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:13:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:13:07,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 22:13:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:13:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-11-23 22:13:07,361 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-11-23 22:13:07,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:07,362 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-11-23 22:13:07,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:13:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-11-23 22:13:07,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:13:07,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:07,362 INFO L410 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:07,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:07,564 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash 377582923, now seen corresponding path program 42 times [2019-11-23 22:13:07,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:07,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572048406] [2019-11-23 22:13:07,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:07,571 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:07,572 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894512593] [2019-11-23 22:13:07,572 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:07,992 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-11-23 22:13:07,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:07,998 WARN L253 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 179 conjunts are in the unsatisfiable core [2019-11-23 22:13:07,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:08,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:09,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572048406] [2019-11-23 22:13:09,027 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:09,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894512593] [2019-11-23 22:13:09,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:09,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-11-23 22:13:09,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017324198] [2019-11-23 22:13:09,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 22:13:09,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:09,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 22:13:09,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 22:13:09,029 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 46 states. [2019-11-23 22:13:10,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:10,415 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-11-23 22:13:10,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 22:13:10,415 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 49 [2019-11-23 22:13:10,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:10,416 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:13:10,416 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 22:13:10,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:13:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 22:13:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-23 22:13:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:13:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-11-23 22:13:10,422 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-11-23 22:13:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:10,422 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-11-23 22:13:10,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 22:13:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-11-23 22:13:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:13:10,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:10,423 INFO L410 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:10,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:10,627 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1179893749, now seen corresponding path program 43 times [2019-11-23 22:13:10,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:10,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934158279] [2019-11-23 22:13:10,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:10,634 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:10,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812834583] [2019-11-23 22:13:10,635 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:10,735 WARN L253 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 183 conjunts are in the unsatisfiable core [2019-11-23 22:13:10,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:11,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:11,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934158279] [2019-11-23 22:13:11,816 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:11,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812834583] [2019-11-23 22:13:11,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:11,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-11-23 22:13:11,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013161004] [2019-11-23 22:13:11,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 22:13:11,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 22:13:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:13:11,818 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 47 states. [2019-11-23 22:13:13,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:13,249 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-11-23 22:13:13,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 22:13:13,249 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 50 [2019-11-23 22:13:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:13,250 INFO L225 Difference]: With dead ends: 55 [2019-11-23 22:13:13,250 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 22:13:13,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:13:13,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 22:13:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-23 22:13:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 22:13:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-11-23 22:13:13,257 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-11-23 22:13:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:13,257 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-11-23 22:13:13,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 22:13:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-11-23 22:13:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 22:13:13,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:13,258 INFO L410 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:13,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:13,462 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:13,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2077936971, now seen corresponding path program 44 times [2019-11-23 22:13:13,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:13,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096809898] [2019-11-23 22:13:13,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:13,472 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:13,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470750401] [2019-11-23 22:13:13,472 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:13,572 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:13,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:13,575 WARN L253 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 187 conjunts are in the unsatisfiable core [2019-11-23 22:13:13,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:14,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:14,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096809898] [2019-11-23 22:13:14,847 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:14,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470750401] [2019-11-23 22:13:14,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:14,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-11-23 22:13:14,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256018867] [2019-11-23 22:13:14,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 22:13:14,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 22:13:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:13:14,849 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 48 states. [2019-11-23 22:13:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:16,348 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-11-23 22:13:16,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 22:13:16,350 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2019-11-23 22:13:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:16,351 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:13:16,351 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:13:16,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:13:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:13:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 22:13:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:13:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-11-23 22:13:16,356 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-11-23 22:13:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:16,357 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-11-23 22:13:16,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 22:13:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-11-23 22:13:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:13:16,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:16,357 INFO L410 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:16,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:16,558 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:16,559 INFO L82 PathProgramCache]: Analyzing trace with hash -8525813, now seen corresponding path program 45 times [2019-11-23 22:13:16,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:16,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289413898] [2019-11-23 22:13:16,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:16,567 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:16,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456414829] [2019-11-23 22:13:16,568 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:18,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-11-23 22:13:18,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:18,939 WARN L253 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 191 conjunts are in the unsatisfiable core [2019-11-23 22:13:18,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:20,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:20,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289413898] [2019-11-23 22:13:20,091 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:20,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456414829] [2019-11-23 22:13:20,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:20,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-11-23 22:13:20,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931331127] [2019-11-23 22:13:20,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:13:20,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:20,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:13:20,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:13:20,092 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 49 states. [2019-11-23 22:13:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:21,668 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-11-23 22:13:21,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 22:13:21,668 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 52 [2019-11-23 22:13:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:21,669 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:13:21,669 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:13:21,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:13:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:13:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 22:13:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 22:13:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-11-23 22:13:21,676 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-11-23 22:13:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:21,676 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-11-23 22:13:21,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:13:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-11-23 22:13:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:13:21,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:21,676 INFO L410 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:21,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:21,877 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:21,878 INFO L82 PathProgramCache]: Analyzing trace with hash -264362677, now seen corresponding path program 46 times [2019-11-23 22:13:21,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:21,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841426276] [2019-11-23 22:13:21,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:21,886 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:21,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91504775] [2019-11-23 22:13:21,886 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:22,332 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:22,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:22,335 WARN L253 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 195 conjunts are in the unsatisfiable core [2019-11-23 22:13:22,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:23,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:23,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841426276] [2019-11-23 22:13:23,557 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:23,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91504775] [2019-11-23 22:13:23,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:23,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-11-23 22:13:23,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367067077] [2019-11-23 22:13:23,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:13:23,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:13:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:13:23,558 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 50 states. [2019-11-23 22:13:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:25,218 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-11-23 22:13:25,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:13:25,219 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 53 [2019-11-23 22:13:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:25,220 INFO L225 Difference]: With dead ends: 58 [2019-11-23 22:13:25,220 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 22:13:25,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:13:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 22:13:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-23 22:13:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:13:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-11-23 22:13:25,225 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-11-23 22:13:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:25,226 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-11-23 22:13:25,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:13:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-11-23 22:13:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:13:25,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:25,226 INFO L410 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:25,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:25,427 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:25,428 INFO L82 PathProgramCache]: Analyzing trace with hash 394629131, now seen corresponding path program 47 times [2019-11-23 22:13:25,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:25,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913829469] [2019-11-23 22:13:25,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:25,436 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:25,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404349074] [2019-11-23 22:13:25,436 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:25,607 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 22:13:25,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:25,612 WARN L253 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 199 conjunts are in the unsatisfiable core [2019-11-23 22:13:25,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:26,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:26,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913829469] [2019-11-23 22:13:26,988 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:26,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404349074] [2019-11-23 22:13:26,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:26,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-11-23 22:13:26,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110793490] [2019-11-23 22:13:26,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:13:26,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:26,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:13:26,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:13:26,989 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 51 states. [2019-11-23 22:13:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:28,772 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-11-23 22:13:28,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 22:13:28,772 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 54 [2019-11-23 22:13:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:28,773 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:13:28,773 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:13:28,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:13:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:13:28,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 22:13:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 22:13:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-11-23 22:13:28,787 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-11-23 22:13:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:28,787 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-11-23 22:13:28,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:13:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-11-23 22:13:28,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 22:13:28,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:28,788 INFO L410 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:28,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:28,992 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -651461301, now seen corresponding path program 48 times [2019-11-23 22:13:28,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:28,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214659868] [2019-11-23 22:13:28,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:29,001 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:29,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640727203] [2019-11-23 22:13:29,001 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:29,612 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:13:29,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:29,620 WARN L253 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 203 conjunts are in the unsatisfiable core [2019-11-23 22:13:29,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:30,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:30,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214659868] [2019-11-23 22:13:30,947 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:30,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640727203] [2019-11-23 22:13:30,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:30,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-11-23 22:13:30,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653707865] [2019-11-23 22:13:30,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 22:13:30,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:30,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 22:13:30,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 22:13:30,948 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 52 states. [2019-11-23 22:13:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:32,787 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-11-23 22:13:32,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 22:13:32,787 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2019-11-23 22:13:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:32,788 INFO L225 Difference]: With dead ends: 60 [2019-11-23 22:13:32,788 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:13:32,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:13:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:13:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-23 22:13:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:13:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-23 22:13:32,794 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-11-23 22:13:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:32,795 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-23 22:13:32,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 22:13:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-23 22:13:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:13:32,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:32,795 INFO L410 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:32,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:32,996 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:32,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1279473675, now seen corresponding path program 49 times [2019-11-23 22:13:32,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:32,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144936581] [2019-11-23 22:13:32,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:33,005 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:33,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081176766] [2019-11-23 22:13:33,005 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:33,143 WARN L253 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 207 conjunts are in the unsatisfiable core [2019-11-23 22:13:33,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:34,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:34,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144936581] [2019-11-23 22:13:34,494 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:34,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081176766] [2019-11-23 22:13:34,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:34,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-11-23 22:13:34,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070071349] [2019-11-23 22:13:34,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 22:13:34,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:34,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 22:13:34,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:13:34,496 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 53 states. [2019-11-23 22:13:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:36,415 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-11-23 22:13:36,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 22:13:36,415 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 56 [2019-11-23 22:13:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:36,415 INFO L225 Difference]: With dead ends: 61 [2019-11-23 22:13:36,416 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 22:13:36,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 22:13:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 22:13:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 22:13:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:13:36,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-11-23 22:13:36,423 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-11-23 22:13:36,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:36,423 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-11-23 22:13:36,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 22:13:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-11-23 22:13:36,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:13:36,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:36,424 INFO L410 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:36,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:36,629 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1008915787, now seen corresponding path program 50 times [2019-11-23 22:13:36,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:36,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58085693] [2019-11-23 22:13:36,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:36,637 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:36,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126210160] [2019-11-23 22:13:36,638 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:36,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:36,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:36,749 WARN L253 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 211 conjunts are in the unsatisfiable core [2019-11-23 22:13:36,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:38,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:38,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58085693] [2019-11-23 22:13:38,247 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:38,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126210160] [2019-11-23 22:13:38,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:38,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-11-23 22:13:38,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88157366] [2019-11-23 22:13:38,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 22:13:38,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:38,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 22:13:38,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 22:13:38,249 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 54 states. [2019-11-23 22:13:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:40,263 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-11-23 22:13:40,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 22:13:40,264 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 57 [2019-11-23 22:13:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:40,265 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:13:40,265 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 22:13:40,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:13:40,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 22:13:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-23 22:13:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:13:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-11-23 22:13:40,272 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-11-23 22:13:40,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:40,272 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-11-23 22:13:40,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 22:13:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-11-23 22:13:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:13:40,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:40,273 INFO L410 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:40,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:40,476 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1211555851, now seen corresponding path program 51 times [2019-11-23 22:13:40,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:40,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153017886] [2019-11-23 22:13:40,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:40,483 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:40,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991296526] [2019-11-23 22:13:40,483 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:44,403 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-11-23 22:13:44,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:44,407 WARN L253 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 215 conjunts are in the unsatisfiable core [2019-11-23 22:13:44,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:45,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:45,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153017886] [2019-11-23 22:13:45,899 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:45,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991296526] [2019-11-23 22:13:45,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:45,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-11-23 22:13:45,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582750035] [2019-11-23 22:13:45,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:13:45,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:45,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:13:45,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:13:45,901 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 55 states. [2019-11-23 22:13:47,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:47,981 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-11-23 22:13:47,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 22:13:47,981 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 58 [2019-11-23 22:13:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:47,982 INFO L225 Difference]: With dead ends: 63 [2019-11-23 22:13:47,982 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 22:13:47,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:13:47,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 22:13:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-23 22:13:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 22:13:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-11-23 22:13:47,988 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-11-23 22:13:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:47,988 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-11-23 22:13:47,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:13:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-11-23 22:13:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 22:13:47,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:47,989 INFO L410 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:48,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:48,193 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1096536757, now seen corresponding path program 52 times [2019-11-23 22:13:48,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:48,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860639038] [2019-11-23 22:13:48,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:48,201 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:48,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252538993] [2019-11-23 22:13:48,202 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:48,744 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:48,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:48,748 WARN L253 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 219 conjunts are in the unsatisfiable core [2019-11-23 22:13:48,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:50,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:50,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860639038] [2019-11-23 22:13:50,293 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:50,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252538993] [2019-11-23 22:13:50,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:50,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-11-23 22:13:50,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392124190] [2019-11-23 22:13:50,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 22:13:50,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:50,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 22:13:50,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 22:13:50,294 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 56 states. [2019-11-23 22:13:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:52,433 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-11-23 22:13:52,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 22:13:52,433 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2019-11-23 22:13:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:52,434 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:13:52,434 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 22:13:52,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:13:52,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 22:13:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-23 22:13:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:13:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-11-23 22:13:52,440 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-11-23 22:13:52,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:52,440 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-11-23 22:13:52,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 22:13:52,441 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-11-23 22:13:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:13:52,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:52,441 INFO L410 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:52,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:52,642 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash 367036427, now seen corresponding path program 53 times [2019-11-23 22:13:52,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:52,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102724932] [2019-11-23 22:13:52,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:52,651 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:52,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741553094] [2019-11-23 22:13:52,651 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:52,824 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-11-23 22:13:52,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:52,828 WARN L253 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 223 conjunts are in the unsatisfiable core [2019-11-23 22:13:52,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:54,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:54,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102724932] [2019-11-23 22:13:54,394 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:54,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741553094] [2019-11-23 22:13:54,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:54,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-11-23 22:13:54,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139639939] [2019-11-23 22:13:54,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 22:13:54,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:54,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 22:13:54,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:13:54,395 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 57 states.