/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:42:21,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:42:21,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:42:21,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:42:21,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:42:21,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:42:21,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:42:21,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:42:21,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:42:21,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:42:21,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:42:21,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:42:21,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:42:21,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:42:21,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:42:21,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:42:21,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:42:21,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:42:21,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:42:21,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:42:21,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:42:21,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:42:21,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:42:21,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:42:21,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:42:21,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:42:21,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:42:21,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:42:21,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:42:21,401 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:42:21,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:42:21,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:42:21,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:42:21,403 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:42:21,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:42:21,404 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:42:21,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:42:21,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:42:21,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:42:21,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:42:21,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:42:21,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:42:21,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:42:21,405 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:42:21,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:42:21,406 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:42:21,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:42:21,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:42:21,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:42:21,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:42:21,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:42:21,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:42:21,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:42:21,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:42:21,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:42:21,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:42:21,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:42:21,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:42:21,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:42:21,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:42:21,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:42:21,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:42:21,713 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:42:21,713 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:42:21,714 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-11-23 20:42:21,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d24375d/a8ddf84a77d4411b959690e7ff887615/FLAGa305f6ff8 [2019-11-23 20:42:22,203 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:42:22,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-11-23 20:42:22,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d24375d/a8ddf84a77d4411b959690e7ff887615/FLAGa305f6ff8 [2019-11-23 20:42:22,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d24375d/a8ddf84a77d4411b959690e7ff887615 [2019-11-23 20:42:22,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:42:22,579 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:42:22,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:22,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:42:22,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:42:22,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@487d0c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22, skipping insertion in model container [2019-11-23 20:42:22,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:42:22,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:42:22,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:22,788 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:42:22,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:22,830 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:42:22,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22 WrapperNode [2019-11-23 20:42:22,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:22,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:22,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:42:22,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:42:22,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:22,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:42:22,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:42:22,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:42:22,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... [2019-11-23 20:42:22,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:42:22,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:42:22,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:42:22,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:42:22,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:42:23,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:42:23,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:42:23,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:42:23,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:42:23,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:42:23,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:42:23,583 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:42:23,583 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:42:23,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:23 BoogieIcfgContainer [2019-11-23 20:42:23,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:42:23,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:42:23,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:42:23,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:42:23,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:42:22" (1/3) ... [2019-11-23 20:42:23,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf09839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:23, skipping insertion in model container [2019-11-23 20:42:23,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:22" (2/3) ... [2019-11-23 20:42:23,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf09839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:23, skipping insertion in model container [2019-11-23 20:42:23,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:23" (3/3) ... [2019-11-23 20:42:23,593 INFO L109 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2019-11-23 20:42:23,601 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:42:23,607 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:42:23,617 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:42:23,640 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:42:23,640 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:42:23,640 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:42:23,641 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:42:23,641 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:42:23,641 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:42:23,641 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:42:23,641 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:42:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-23 20:42:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:42:23,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:23,665 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:23,666 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:23,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2019-11-23 20:42:23,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:23,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759290544] [2019-11-23 20:42:23,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:23,756 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:23,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637099719] [2019-11-23 20:42:23,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:23,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:23,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:23,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759290544] [2019-11-23 20:42:23,875 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:23,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637099719] [2019-11-23 20:42:23,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:23,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:42:23,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723569480] [2019-11-23 20:42:23,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:42:23,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:23,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:42:23,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:42:23,896 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-23 20:42:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:23,988 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2019-11-23 20:42:23,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:42:23,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:42:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:24,002 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:42:24,002 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:42:24,006 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:42:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:42:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-23 20:42:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:42:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2019-11-23 20:42:24,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2019-11-23 20:42:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:24,042 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2019-11-23 20:42:24,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:42:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2019-11-23 20:42:24,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:42:24,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:24,043 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:24,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:24,247 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:24,248 INFO L82 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2019-11-23 20:42:24,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:24,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193270708] [2019-11-23 20:42:24,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:24,255 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:24,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459969220] [2019-11-23 20:42:24,256 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 20:42:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:24,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:24,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:24,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193270708] [2019-11-23 20:42:24,325 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:24,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459969220] [2019-11-23 20:42:24,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:24,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:24,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354511646] [2019-11-23 20:42:24,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:24,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:24,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:24,329 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 4 states. [2019-11-23 20:42:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:24,421 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2019-11-23 20:42:24,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:24,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 20:42:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:24,423 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:42:24,423 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:42:24,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:42:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2019-11-23 20:42:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:42:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-23 20:42:24,432 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2019-11-23 20:42:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:24,432 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-23 20:42:24,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2019-11-23 20:42:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:42:24,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:24,434 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:24,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:24,638 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:24,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:24,639 INFO L82 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2019-11-23 20:42:24,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:24,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483196563] [2019-11-23 20:42:24,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:24,646 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:24,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087009874] [2019-11-23 20:42:24,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:24,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:24,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:24,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483196563] [2019-11-23 20:42:24,749 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:24,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087009874] [2019-11-23 20:42:24,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:24,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:42:24,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770422108] [2019-11-23 20:42:24,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:42:24,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:42:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:24,751 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 5 states. [2019-11-23 20:42:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:24,852 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2019-11-23 20:42:24,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:42:24,853 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:42:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:24,854 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:42:24,854 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:42:24,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:24,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:42:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2019-11-23 20:42:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:42:24,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2019-11-23 20:42:24,863 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2019-11-23 20:42:24,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:24,864 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2019-11-23 20:42:24,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:42:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2019-11-23 20:42:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:42:24,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:24,865 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:25,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,066 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:25,067 INFO L82 PathProgramCache]: Analyzing trace with hash -477019482, now seen corresponding path program 2 times [2019-11-23 20:42:25,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:25,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044169771] [2019-11-23 20:42:25,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:25,074 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:25,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441899417] [2019-11-23 20:42:25,075 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:42:25,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:25,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:25,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:42:25,152 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044169771] [2019-11-23 20:42:25,152 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:25,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441899417] [2019-11-23 20:42:25,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:25,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:25,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902083194] [2019-11-23 20:42:25,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:25,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:25,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:25,155 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2019-11-23 20:42:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:25,231 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2019-11-23 20:42:25,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:25,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:42:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:25,232 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:42:25,232 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:42:25,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:42:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2019-11-23 20:42:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:42:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-11-23 20:42:25,241 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 15 [2019-11-23 20:42:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:25,242 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-11-23 20:42:25,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-11-23 20:42:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:42:25,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:25,243 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:25,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,446 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1114279158, now seen corresponding path program 1 times [2019-11-23 20:42:25,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:25,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519107526] [2019-11-23 20:42:25,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:25,452 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:25,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765959428] [2019-11-23 20:42:25,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:25,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:42:25,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:42:25,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519107526] [2019-11-23 20:42:25,538 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:25,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765959428] [2019-11-23 20:42:25,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:25,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:42:25,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011256059] [2019-11-23 20:42:25,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:42:25,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:25,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:42:25,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:25,541 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 6 states. [2019-11-23 20:42:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:25,655 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2019-11-23 20:42:25,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:42:25,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-23 20:42:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:25,657 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:42:25,657 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:42:25,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:42:25,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2019-11-23 20:42:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:42:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2019-11-23 20:42:25,666 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2019-11-23 20:42:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:25,667 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2019-11-23 20:42:25,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:42:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2019-11-23 20:42:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:42:25,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:25,668 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:25,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,874 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:25,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:25,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1632092484, now seen corresponding path program 2 times [2019-11-23 20:42:25,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:25,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310829208] [2019-11-23 20:42:25,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:25,892 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:25,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993108708] [2019-11-23 20:42:25,893 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:25,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:25,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:25,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:42:25,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:42:25,992 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310829208] [2019-11-23 20:42:25,992 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:25,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993108708] [2019-11-23 20:42:25,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:25,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:42:25,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076498996] [2019-11-23 20:42:25,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:42:25,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:25,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:42:25,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:25,995 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2019-11-23 20:42:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:26,111 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2019-11-23 20:42:26,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:42:26,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-11-23 20:42:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:26,112 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:42:26,112 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:42:26,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:42:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2019-11-23 20:42:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:42:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2019-11-23 20:42:26,122 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 28 [2019-11-23 20:42:26,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:26,122 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2019-11-23 20:42:26,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:42:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2019-11-23 20:42:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:42:26,123 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:26,124 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:26,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:26,328 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 3 times [2019-11-23 20:42:26,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:26,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245666614] [2019-11-23 20:42:26,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:26,336 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:26,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410455718] [2019-11-23 20:42:26,336 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:26,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:42:26,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:26,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:26,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:42:26,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245666614] [2019-11-23 20:42:26,405 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:26,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410455718] [2019-11-23 20:42:26,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:26,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:42:26,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002330742] [2019-11-23 20:42:26,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:26,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:26,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:26,408 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 4 states. [2019-11-23 20:42:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:26,453 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2019-11-23 20:42:26,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:26,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-23 20:42:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:26,456 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:42:26,456 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:42:26,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:26,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:42:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-11-23 20:42:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:42:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2019-11-23 20:42:26,474 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 32 [2019-11-23 20:42:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:26,474 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2019-11-23 20:42:26,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2019-11-23 20:42:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:42:26,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:26,479 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:26,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:26,692 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:26,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:26,692 INFO L82 PathProgramCache]: Analyzing trace with hash -709845727, now seen corresponding path program 4 times [2019-11-23 20:42:26,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:26,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962642923] [2019-11-23 20:42:26,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:26,704 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:26,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684257003] [2019-11-23 20:42:26,705 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:26,777 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:42:26,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:26,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:42:26,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:42:26,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962642923] [2019-11-23 20:42:26,861 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:26,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684257003] [2019-11-23 20:42:26,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:26,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:42:26,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544095317] [2019-11-23 20:42:26,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:42:26,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:42:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:42:26,863 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 9 states. [2019-11-23 20:42:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:27,067 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2019-11-23 20:42:27,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:42:27,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-11-23 20:42:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:27,069 INFO L225 Difference]: With dead ends: 145 [2019-11-23 20:42:27,070 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:42:27,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:42:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:42:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2019-11-23 20:42:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:42:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2019-11-23 20:42:27,100 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 39 [2019-11-23 20:42:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:27,100 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2019-11-23 20:42:27,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:42:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2019-11-23 20:42:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:42:27,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:27,102 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:27,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:27,313 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:27,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1528313637, now seen corresponding path program 5 times [2019-11-23 20:42:27,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:27,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810014725] [2019-11-23 20:42:27,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:27,321 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:27,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683849252] [2019-11-23 20:42:27,322 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:03,640 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:43:03,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:03,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:43:03,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 60 proven. 22 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:43:03,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810014725] [2019-11-23 20:43:03,716 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:03,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683849252] [2019-11-23 20:43:03,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:03,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:43:03,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498973212] [2019-11-23 20:43:03,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:43:03,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:43:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:43:03,718 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 8 states. [2019-11-23 20:43:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:03,806 INFO L93 Difference]: Finished difference Result 154 states and 195 transitions. [2019-11-23 20:43:03,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:43:03,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2019-11-23 20:43:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:03,807 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:43:03,808 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:43:03,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:43:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:43:03,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2019-11-23 20:43:03,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:43:03,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2019-11-23 20:43:03,821 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 54 [2019-11-23 20:43:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:03,821 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2019-11-23 20:43:03,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:43:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2019-11-23 20:43:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:43:03,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:03,823 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:04,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:04,029 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2036509453, now seen corresponding path program 6 times [2019-11-23 20:43:04,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:04,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273140186] [2019-11-23 20:43:04,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:04,035 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:04,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628666793] [2019-11-23 20:43:04,036 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:04,082 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:43:04,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:04,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:43:04,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:43:04,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273140186] [2019-11-23 20:43:04,140 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:04,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628666793] [2019-11-23 20:43:04,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:04,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:43:04,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919642562] [2019-11-23 20:43:04,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:43:04,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:43:04,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:43:04,142 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand 6 states. [2019-11-23 20:43:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:04,250 INFO L93 Difference]: Finished difference Result 210 states and 267 transitions. [2019-11-23 20:43:04,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:43:04,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2019-11-23 20:43:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:04,253 INFO L225 Difference]: With dead ends: 210 [2019-11-23 20:43:04,253 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 20:43:04,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:43:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 20:43:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 96. [2019-11-23 20:43:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:43:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2019-11-23 20:43:04,267 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 62 [2019-11-23 20:43:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:04,268 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2019-11-23 20:43:04,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:43:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2019-11-23 20:43:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:43:04,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:04,269 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:04,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:04,473 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:04,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:04,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1722288743, now seen corresponding path program 7 times [2019-11-23 20:43:04,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:04,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58723323] [2019-11-23 20:43:04,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:04,481 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:04,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288114431] [2019-11-23 20:43:04,481 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:04,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:43:04,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2019-11-23 20:43:04,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58723323] [2019-11-23 20:43:04,634 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:04,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288114431] [2019-11-23 20:43:04,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:04,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:43:04,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265489366] [2019-11-23 20:43:04,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:43:04,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:43:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:43:04,636 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand 9 states. [2019-11-23 20:43:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:04,730 INFO L93 Difference]: Finished difference Result 218 states and 279 transitions. [2019-11-23 20:43:04,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:43:04,731 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2019-11-23 20:43:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:04,732 INFO L225 Difference]: With dead ends: 218 [2019-11-23 20:43:04,732 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:43:04,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:43:04,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:43:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2019-11-23 20:43:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 20:43:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2019-11-23 20:43:04,744 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 80 [2019-11-23 20:43:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:04,745 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2019-11-23 20:43:04,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:43:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2019-11-23 20:43:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:43:04,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:04,746 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:04,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:04,950 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:04,950 INFO L82 PathProgramCache]: Analyzing trace with hash -156056031, now seen corresponding path program 8 times [2019-11-23 20:43:04,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:04,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759148929] [2019-11-23 20:43:04,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:04,956 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:04,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604048161] [2019-11-23 20:43:04,957 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:05,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:43:05,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:05,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:43:05,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-11-23 20:43:05,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759148929] [2019-11-23 20:43:05,111 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:05,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604048161] [2019-11-23 20:43:05,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:05,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:43:05,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258055530] [2019-11-23 20:43:05,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:43:05,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:05,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:43:05,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:43:05,113 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand 10 states. [2019-11-23 20:43:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:05,223 INFO L93 Difference]: Finished difference Result 247 states and 315 transitions. [2019-11-23 20:43:05,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:43:05,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 91 [2019-11-23 20:43:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:05,225 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:43:05,225 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:43:05,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:43:05,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:43:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2019-11-23 20:43:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:43:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2019-11-23 20:43:05,237 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 91 [2019-11-23 20:43:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:05,237 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2019-11-23 20:43:05,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:43:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2019-11-23 20:43:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:43:05,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:05,239 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:05,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:05,442 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:05,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:05,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1354472153, now seen corresponding path program 9 times [2019-11-23 20:43:05,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:05,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075783803] [2019-11-23 20:43:05,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:05,450 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:05,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235945052] [2019-11-23 20:43:05,451 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:05,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:43:05,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:05,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:43:05,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:05,575 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-23 20:43:05,576 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:43:05,579 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:43:05,580 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:43:05,580 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-23 20:43:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-23 20:43:05,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075783803] [2019-11-23 20:43:05,596 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:05,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235945052] [2019-11-23 20:43:05,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:43:05,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 20:43:05,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252171511] [2019-11-23 20:43:05,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:43:05,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:05,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:43:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:43:05,598 INFO L87 Difference]: Start difference. First operand 124 states and 159 transitions. Second operand 6 states. [2019-11-23 20:43:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:05,667 INFO L93 Difference]: Finished difference Result 239 states and 311 transitions. [2019-11-23 20:43:05,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:43:05,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2019-11-23 20:43:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:05,669 INFO L225 Difference]: With dead ends: 239 [2019-11-23 20:43:05,669 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 20:43:05,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:43:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 20:43:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2019-11-23 20:43:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:43:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2019-11-23 20:43:05,680 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 102 [2019-11-23 20:43:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:05,680 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2019-11-23 20:43:05,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:43:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2019-11-23 20:43:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:43:05,682 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:05,682 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:05,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:05,886 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash 863158245, now seen corresponding path program 1 times [2019-11-23 20:43:05,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:05,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481007440] [2019-11-23 20:43:05,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:05,893 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:05,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913928978] [2019-11-23 20:43:05,893 INFO L94 rtionOrderModulation]: Keeping assertion order 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 20:43:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:43:05,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:43:05,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-11-23 20:43:06,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481007440] [2019-11-23 20:43:06,086 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:06,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913928978] [2019-11-23 20:43:06,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:06,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:43:06,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201975791] [2019-11-23 20:43:06,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:43:06,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:06,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:43:06,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:43:06,087 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand 11 states. [2019-11-23 20:43:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:06,228 INFO L93 Difference]: Finished difference Result 276 states and 349 transitions. [2019-11-23 20:43:06,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:43:06,229 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 102 [2019-11-23 20:43:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:06,230 INFO L225 Difference]: With dead ends: 276 [2019-11-23 20:43:06,230 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:43:06,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:43:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:43:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 138. [2019-11-23 20:43:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:43:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2019-11-23 20:43:06,242 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 102 [2019-11-23 20:43:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:06,242 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2019-11-23 20:43:06,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:43:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2019-11-23 20:43:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:43:06,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:06,243 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 23, 16, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:06,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:06,447 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:06,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:06,448 INFO L82 PathProgramCache]: Analyzing trace with hash 565445987, now seen corresponding path program 2 times [2019-11-23 20:43:06,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:06,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562173819] [2019-11-23 20:43:06,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:06,455 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:06,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285859491] [2019-11-23 20:43:06,456 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 20:43:06,529 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:43:06,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:06,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:43:06,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-23 20:43:06,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562173819] [2019-11-23 20:43:06,689 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:06,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285859491] [2019-11-23 20:43:06,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:06,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 20:43:06,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634655646] [2019-11-23 20:43:06,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:43:06,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:43:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:43:06,692 INFO L87 Difference]: Start difference. First operand 138 states and 176 transitions. Second operand 12 states. [2019-11-23 20:43:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:06,824 INFO L93 Difference]: Finished difference Result 305 states and 385 transitions. [2019-11-23 20:43:06,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:43:06,825 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2019-11-23 20:43:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:06,826 INFO L225 Difference]: With dead ends: 305 [2019-11-23 20:43:06,826 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 20:43:06,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:43:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 20:43:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 152. [2019-11-23 20:43:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-23 20:43:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2019-11-23 20:43:06,838 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 113 [2019-11-23 20:43:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:06,839 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2019-11-23 20:43:06,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:43:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2019-11-23 20:43:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 20:43:06,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:06,840 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 26, 18, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:07,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:07,049 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1542088923, now seen corresponding path program 3 times [2019-11-23 20:43:07,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:07,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537859689] [2019-11-23 20:43:07,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:07,057 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:07,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626314701] [2019-11-23 20:43:07,057 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 20:43:08,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:43:08,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:08,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:43:08,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2019-11-23 20:43:08,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537859689] [2019-11-23 20:43:08,212 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:08,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626314701] [2019-11-23 20:43:08,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:08,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:43:08,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232985448] [2019-11-23 20:43:08,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:43:08,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:43:08,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:43:08,214 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand 13 states. [2019-11-23 20:43:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:08,373 INFO L93 Difference]: Finished difference Result 334 states and 421 transitions. [2019-11-23 20:43:08,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:43:08,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 124 [2019-11-23 20:43:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:08,374 INFO L225 Difference]: With dead ends: 334 [2019-11-23 20:43:08,375 INFO L226 Difference]: Without dead ends: 195 [2019-11-23 20:43:08,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:43:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-23 20:43:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 166. [2019-11-23 20:43:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-23 20:43:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2019-11-23 20:43:08,386 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 124 [2019-11-23 20:43:08,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:08,387 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2019-11-23 20:43:08,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:43:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2019-11-23 20:43:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:43:08,388 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:08,388 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 20, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:08,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:08,603 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash 855801123, now seen corresponding path program 4 times [2019-11-23 20:43:08,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:08,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067290660] [2019-11-23 20:43:08,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:08,609 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:08,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443999484] [2019-11-23 20:43:08,610 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 20:43:08,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:43:08,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:43:08,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:43:08,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1642 backedges. 117 proven. 1000 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-11-23 20:43:08,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067290660] [2019-11-23 20:43:08,937 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:43:08,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443999484] [2019-11-23 20:43:08,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:43:08,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 20:43:08,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283580857] [2019-11-23 20:43:08,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:43:08,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:43:08,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:43:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:43:08,938 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand 17 states. [2019-11-23 20:43:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:43:09,514 INFO L93 Difference]: Finished difference Result 494 states and 617 transitions. [2019-11-23 20:43:09,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:43:09,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2019-11-23 20:43:09,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:43:09,516 INFO L225 Difference]: With dead ends: 494 [2019-11-23 20:43:09,517 INFO L226 Difference]: Without dead ends: 458 [2019-11-23 20:43:09,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:43:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2019-11-23 20:43:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 199. [2019-11-23 20:43:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-23 20:43:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 256 transitions. [2019-11-23 20:43:09,542 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 256 transitions. Word has length 135 [2019-11-23 20:43:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:43:09,543 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 256 transitions. [2019-11-23 20:43:09,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:43:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 256 transitions. [2019-11-23 20:43:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 20:43:09,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:43:09,545 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 39, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:43:09,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:43:09,748 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:43:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:43:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1609734887, now seen corresponding path program 5 times [2019-11-23 20:43:09,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:43:09,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505385738] [2019-11-23 20:43:09,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:43:09,755 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:43:09,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112437173] [2019-11-23 20:43:09,756 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