/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-tiling/poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:48:03,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:48:03,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:48:03,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:48:03,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:48:03,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:48:03,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:48:03,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:48:03,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:48:03,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:48:03,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:48:03,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:48:03,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:48:03,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:48:03,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:48:03,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:48:03,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:48:03,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:48:03,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:48:03,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:48:03,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:48:03,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:48:03,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:48:03,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:48:03,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:48:03,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:48:03,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:48:03,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:48:03,781 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 20:48:03,796 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:48:03,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:48:03,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:48:03,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:48:03,798 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:48:03,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:48:03,798 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:48:03,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:48:03,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:48:03,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:48:03,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:48:03,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:48:03,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:48:03,799 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:48:03,799 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:48:03,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:48:03,800 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:48:03,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:48:03,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:48:03,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:48:03,801 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:48:03,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:48:03,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:48:03,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:48:03,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:48:03,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:48:03,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:48:03,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:48:03,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:48:03,802 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:48:04,083 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:48:04,102 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:48:04,106 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:48:04,107 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:48:04,107 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:48:04,109 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly2.c [2019-11-23 20:48:04,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12fc906d0/b0b91d7223ce4818abda75eb63abb3e7/FLAGd96e3e3c4 [2019-11-23 20:48:04,653 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:48:04,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly2.c [2019-11-23 20:48:04,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12fc906d0/b0b91d7223ce4818abda75eb63abb3e7/FLAGd96e3e3c4 [2019-11-23 20:48:05,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12fc906d0/b0b91d7223ce4818abda75eb63abb3e7 [2019-11-23 20:48:05,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:48:05,022 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:48:05,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:48:05,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:48:05,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:48:05,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e47287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05, skipping insertion in model container [2019-11-23 20:48:05,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:48:05,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:48:05,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:48:05,252 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:48:05,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:48:05,291 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:48:05,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05 WrapperNode [2019-11-23 20:48:05,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:48:05,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:48:05,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:48:05,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:48:05,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:48:05,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:48:05,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:48:05,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:48:05,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (1/1) ... [2019-11-23 20:48:05,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:48:05,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:48:05,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:48:05,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:48:05,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (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 20:48:05,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:48:05,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:48:05,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:48:05,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:48:05,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:48:05,787 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:48:05,787 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:48:05,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:48:05 BoogieIcfgContainer [2019-11-23 20:48:05,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:48:05,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:48:05,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:48:05,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:48:05,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:48:05" (1/3) ... [2019-11-23 20:48:05,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214e3a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:48:05, skipping insertion in model container [2019-11-23 20:48:05,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:48:05" (2/3) ... [2019-11-23 20:48:05,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214e3a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:48:05, skipping insertion in model container [2019-11-23 20:48:05,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:48:05" (3/3) ... [2019-11-23 20:48:05,815 INFO L109 eAbstractionObserver]: Analyzing ICFG poly2.c [2019-11-23 20:48:05,838 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:48:05,850 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:48:05,868 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:48:05,889 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:48:05,889 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:48:05,889 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:48:05,890 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:48:05,890 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:48:05,890 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:48:05,890 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:48:05,890 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:48:05,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-23 20:48:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:48:05,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:05,909 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:05,909 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1777950591, now seen corresponding path program 1 times [2019-11-23 20:48:05,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:05,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565603931] [2019-11-23 20:48:05,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:06,052 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 20:48:06,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565603931] [2019-11-23 20:48:06,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:48:06,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:48:06,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702610625] [2019-11-23 20:48:06,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:48:06,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:06,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:48:06,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:48:06,071 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-23 20:48:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:06,086 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-23 20:48:06,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:48:06,088 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-23 20:48:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:06,096 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:48:06,096 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:48:06,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:48:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:48:06,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:48:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:48:06,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 20:48:06,139 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-23 20:48:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:06,139 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 20:48:06,140 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:48:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 20:48:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:48:06,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:06,141 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:06,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 747895801, now seen corresponding path program 1 times [2019-11-23 20:48:06,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:06,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41494941] [2019-11-23 20:48:06,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:06,173 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:06,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748979700] [2019-11-23 20:48:06,174 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 20:48:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:06,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:48:06,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:06,335 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 20:48:06,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41494941] [2019-11-23 20:48:06,336 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:06,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748979700] [2019-11-23 20:48:06,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:48:06,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:48:06,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619598405] [2019-11-23 20:48:06,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:48:06,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:06,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:48:06,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:48:06,340 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-11-23 20:48:06,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:06,464 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-23 20:48:06,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:48:06,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:48:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:06,467 INFO L225 Difference]: With dead ends: 27 [2019-11-23 20:48:06,467 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:48:06,468 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 20:48:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:48:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-23 20:48:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:48:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:48:06,477 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-23 20:48:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:06,477 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:48:06,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:48:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:48:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:48:06,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:06,481 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:06,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:06,685 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash -483954537, now seen corresponding path program 1 times [2019-11-23 20:48:06,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:06,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497998424] [2019-11-23 20:48:06,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:06,699 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:06,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837393432] [2019-11-23 20:48:06,699 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 20:48:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:06,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:48:06,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:06,790 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497998424] [2019-11-23 20:48:06,790 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:06,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837393432] [2019-11-23 20:48:06,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:06,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:48:06,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440592517] [2019-11-23 20:48:06,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:48:06,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:48:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:48:06,793 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2019-11-23 20:48:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:06,967 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-11-23 20:48:06,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:48:06,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 20:48:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:06,968 INFO L225 Difference]: With dead ends: 29 [2019-11-23 20:48:06,968 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:48:06,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 20:48:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:48:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-23 20:48:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:48:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-23 20:48:06,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-11-23 20:48:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:06,974 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-23 20:48:06,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:48:06,974 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-23 20:48:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:48:06,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:06,975 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:07,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:07,179 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:07,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:07,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1118844341, now seen corresponding path program 2 times [2019-11-23 20:48:07,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:07,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509134846] [2019-11-23 20:48:07,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:07,191 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:07,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341518047] [2019-11-23 20:48:07,192 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:07,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:48:07,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:07,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:48:07,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:07,254 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 20:48:07,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509134846] [2019-11-23 20:48:07,254 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:07,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341518047] [2019-11-23 20:48:07,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:48:07,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:48:07,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842125672] [2019-11-23 20:48:07,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:48:07,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:48:07,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:48:07,257 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2019-11-23 20:48:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:07,306 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-11-23 20:48:07,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:48:07,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:48:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:07,308 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:48:07,308 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:48:07,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 20:48:07,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:48:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2019-11-23 20:48:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:48:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-23 20:48:07,314 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-11-23 20:48:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:07,314 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-23 20:48:07,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:48:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-23 20:48:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:48:07,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:07,316 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:07,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:07,517 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1181996269, now seen corresponding path program 1 times [2019-11-23 20:48:07,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:07,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121872453] [2019-11-23 20:48:07,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:07,528 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:07,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289548703] [2019-11-23 20:48:07,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:48:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:07,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:48:07,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:48:07,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121872453] [2019-11-23 20:48:07,618 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:07,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289548703] [2019-11-23 20:48:07,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:07,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:48:07,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964306818] [2019-11-23 20:48:07,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:48:07,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:48:07,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:48:07,621 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2019-11-23 20:48:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:07,731 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-11-23 20:48:07,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:48:07,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:48:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:07,733 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:48:07,733 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:48:07,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 20:48:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:48:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2019-11-23 20:48:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:48:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:48:07,739 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-23 20:48:07,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:07,739 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:48:07,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:48:07,740 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:48:07,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:48:07,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:07,740 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:07,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:07,944 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash -381665039, now seen corresponding path program 2 times [2019-11-23 20:48:07,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:07,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838933800] [2019-11-23 20:48:07,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:07,953 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:07,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634329354] [2019-11-23 20:48:07,954 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 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 20:48:08,000 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:48:08,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:08,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:48:08,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:08,052 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2019-11-23 20:48:08,053 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,270 WARN L192 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2019-11-23 20:48:08,272 INFO L567 ElimStorePlain]: treesize reduction 38, result has 35.6 percent of original size [2019-11-23 20:48:08,272 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-11-23 20:48:08,273 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,273 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:21 [2019-11-23 20:48:08,360 INFO L343 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-23 20:48:08,361 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2019-11-23 20:48:08,361 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,368 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:08,369 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,369 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-23 20:48:08,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:08,415 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:08,415 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,505 INFO L343 Elim1Store]: treesize reduction 10, result has 91.9 percent of original size [2019-11-23 20:48:08,506 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 142 [2019-11-23 20:48:08,509 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,540 INFO L567 ElimStorePlain]: treesize reduction 133, result has 17.4 percent of original size [2019-11-23 20:48:08,541 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,541 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:112, output treesize:28 [2019-11-23 20:48:08,604 INFO L343 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2019-11-23 20:48:08,605 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2019-11-23 20:48:08,606 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,613 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:08,613 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:08,613 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2019-11-23 20:48:08,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:08,677 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838933800] [2019-11-23 20:48:08,678 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:08,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634329354] [2019-11-23 20:48:08,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:08,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 20:48:08,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884517196] [2019-11-23 20:48:08,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:48:08,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:48:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:48:08,680 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 12 states. [2019-11-23 20:48:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:09,814 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2019-11-23 20:48:09,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:48:09,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2019-11-23 20:48:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:09,816 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:48:09,816 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:48:09,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:48:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:48:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2019-11-23 20:48:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:48:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-23 20:48:09,825 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2019-11-23 20:48:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:09,826 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-23 20:48:09,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:48:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-23 20:48:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:48:09,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:09,827 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:10,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:10,030 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:10,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:10,031 INFO L82 PathProgramCache]: Analyzing trace with hash -62498993, now seen corresponding path program 3 times [2019-11-23 20:48:10,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:10,032 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887336095] [2019-11-23 20:48:10,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:10,041 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:10,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929364549] [2019-11-23 20:48:10,042 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 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 20:48:10,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:48:10,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:10,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:48:10,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:10,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887336095] [2019-11-23 20:48:10,187 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:10,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929364549] [2019-11-23 20:48:10,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:10,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:48:10,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043201967] [2019-11-23 20:48:10,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:48:10,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:10,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:48:10,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:48:10,189 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 9 states. [2019-11-23 20:48:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:10,386 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2019-11-23 20:48:10,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:48:10,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-23 20:48:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:10,388 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:48:10,388 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:48:10,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:48:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:48:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2019-11-23 20:48:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:48:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-11-23 20:48:10,397 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 20 [2019-11-23 20:48:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:10,397 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-11-23 20:48:10,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:48:10,397 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-11-23 20:48:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:48:10,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:10,398 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:10,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:10,604 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash -514050161, now seen corresponding path program 4 times [2019-11-23 20:48:10,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:10,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673621565] [2019-11-23 20:48:10,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:10,613 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:10,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346433484] [2019-11-23 20:48:10,614 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 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 20:48:10,646 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:48:10,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:10,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:48:10,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:10,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673621565] [2019-11-23 20:48:10,713 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:10,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346433484] [2019-11-23 20:48:10,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:10,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:48:10,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348930085] [2019-11-23 20:48:10,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:48:10,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:10,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:48:10,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:48:10,717 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 9 states. [2019-11-23 20:48:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:11,063 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2019-11-23 20:48:11,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:48:11,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-23 20:48:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:11,065 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:48:11,065 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:48:11,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:48:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:48:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2019-11-23 20:48:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:48:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-11-23 20:48:11,073 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 20 [2019-11-23 20:48:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:11,073 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-11-23 20:48:11,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:48:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-11-23 20:48:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:48:11,074 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:11,074 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:11,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:11,275 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash -448018393, now seen corresponding path program 1 times [2019-11-23 20:48:11,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:11,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8354028] [2019-11-23 20:48:11,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:11,284 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:11,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046564260] [2019-11-23 20:48:11,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:11,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:48:11,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:11,357 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:48:11,358 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:11,360 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:11,360 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:11,360 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2019-11-23 20:48:11,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:11,397 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:11,398 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:11,403 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 36 [2019-11-23 20:48:11,404 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:11,406 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:11,406 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:11,418 INFO L567 ElimStorePlain]: treesize reduction 5, result has 72.2 percent of original size [2019-11-23 20:48:11,418 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:11,418 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:98, output treesize:13 [2019-11-23 20:48:11,446 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 31 treesize of output 15 [2019-11-23 20:48:11,447 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:11,449 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:11,449 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:11,449 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:9 [2019-11-23 20:48:11,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:11,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8354028] [2019-11-23 20:48:11,519 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:11,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046564260] [2019-11-23 20:48:11,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:11,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 20:48:11,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713151348] [2019-11-23 20:48:11,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:48:11,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:48:11,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:48:11,521 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2019-11-23 20:48:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:11,709 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-23 20:48:11,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:48:11,710 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-23 20:48:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:11,711 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:48:11,711 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:48:11,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:48:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:48:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2019-11-23 20:48:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:48:11,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-23 20:48:11,722 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2019-11-23 20:48:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:11,722 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-23 20:48:11,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:48:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-23 20:48:11,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:48:11,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:11,723 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:11,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:11,927 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:11,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1564417645, now seen corresponding path program 5 times [2019-11-23 20:48:11,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:11,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120351907] [2019-11-23 20:48:11,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:11,935 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:11,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782139791] [2019-11-23 20:48:11,935 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 20:48:24,725 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:48:24,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:24,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:48:24,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:24,748 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2019-11-23 20:48:24,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:24,852 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2019-11-23 20:48:24,852 INFO L567 ElimStorePlain]: treesize reduction 38, result has 35.6 percent of original size [2019-11-23 20:48:24,852 INFO L464 ElimStorePlain]: Eliminatee v_prenex_2 vanished before elimination [2019-11-23 20:48:24,853 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:24,853 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:21 [2019-11-23 20:48:24,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:24,903 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:24,906 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-11-23 20:48:24,907 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:24,910 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:24,910 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:24,925 INFO L567 ElimStorePlain]: treesize reduction 5, result has 84.8 percent of original size [2019-11-23 20:48:24,925 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:24,925 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:28 [2019-11-23 20:48:24,988 INFO L343 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2019-11-23 20:48:24,988 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2019-11-23 20:48:24,990 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:24,997 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:24,997 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:24,998 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:48:25,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:25,051 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:25,053 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:25,054 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:25,054 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:25,055 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:25,066 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:25,069 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:25,072 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2019-11-23 20:48:25,073 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:25,085 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:25,085 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:25,106 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-11-23 20:48:25,107 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:25,107 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:130, output treesize:35 [2019-11-23 20:48:25,153 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:25,167 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:25,167 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:25,293 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-11-23 20:48:25,294 INFO L343 Elim1Store]: treesize reduction 124, result has 52.7 percent of original size [2019-11-23 20:48:25,294 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 170 [2019-11-23 20:48:25,296 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:25,326 INFO L567 ElimStorePlain]: treesize reduction 143, result has 23.1 percent of original size [2019-11-23 20:48:25,327 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:25,327 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:146, output treesize:43 [2019-11-23 20:48:25,401 INFO L343 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2019-11-23 20:48:25,402 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 37 [2019-11-23 20:48:25,403 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:25,419 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:25,420 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:25,420 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:26 [2019-11-23 20:48:25,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:25,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120351907] [2019-11-23 20:48:25,498 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:25,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782139791] [2019-11-23 20:48:25,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:25,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 20:48:25,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461021501] [2019-11-23 20:48:25,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:48:25,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:48:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:48:25,500 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 16 states. [2019-11-23 20:48:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:26,165 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2019-11-23 20:48:26,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:48:26,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 22 [2019-11-23 20:48:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:26,171 INFO L225 Difference]: With dead ends: 55 [2019-11-23 20:48:26,171 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:48:26,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:48:26,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:48:26,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2019-11-23 20:48:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:48:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-23 20:48:26,178 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2019-11-23 20:48:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:26,178 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-23 20:48:26,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:48:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-23 20:48:26,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:48:26,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:26,179 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:26,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:26,385 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1812186571, now seen corresponding path program 6 times [2019-11-23 20:48:26,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:26,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683214975] [2019-11-23 20:48:26,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:26,391 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:26,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216150262] [2019-11-23 20:48:26,391 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 20:48:26,509 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:48:26,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:26,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:48:26,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:26,584 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683214975] [2019-11-23 20:48:26,585 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:26,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216150262] [2019-11-23 20:48:26,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:26,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:48:26,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686079517] [2019-11-23 20:48:26,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:48:26,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:48:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:48:26,587 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2019-11-23 20:48:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:26,839 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2019-11-23 20:48:26,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:48:26,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-23 20:48:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:26,840 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:48:26,840 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:48:26,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:48:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:48:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2019-11-23 20:48:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:48:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2019-11-23 20:48:26,851 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2019-11-23 20:48:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:26,851 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2019-11-23 20:48:26,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:48:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2019-11-23 20:48:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:48:26,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:26,853 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:27,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:27,056 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:27,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1663211019, now seen corresponding path program 7 times [2019-11-23 20:48:27,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:27,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900228604] [2019-11-23 20:48:27,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:27,063 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:27,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868358850] [2019-11-23 20:48:27,064 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 20:48:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:48:27,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:48:27,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:27,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900228604] [2019-11-23 20:48:27,176 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:27,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868358850] [2019-11-23 20:48:27,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:27,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:48:27,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315888875] [2019-11-23 20:48:27,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:48:27,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:48:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:48:27,178 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 11 states. [2019-11-23 20:48:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:27,475 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2019-11-23 20:48:27,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:48:27,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-11-23 20:48:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:27,476 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:48:27,476 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:48:27,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:48:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:48:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 48. [2019-11-23 20:48:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:48:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-11-23 20:48:27,488 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 24 [2019-11-23 20:48:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:27,489 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-11-23 20:48:27,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:48:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-11-23 20:48:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:48:27,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:27,489 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:27,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:27,690 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1533511587, now seen corresponding path program 2 times [2019-11-23 20:48:27,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:27,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588708033] [2019-11-23 20:48:27,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:27,698 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:27,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884124894] [2019-11-23 20:48:27,699 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 20:48:27,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:48:27,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:27,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:48:27,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:27,779 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:27,780 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:27,869 INFO L567 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2019-11-23 20:48:27,873 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-11-23 20:48:27,874 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:27,909 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:27,910 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:27,910 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:21 [2019-11-23 20:48:27,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:27,964 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:27,968 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2019-11-23 20:48:27,969 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:27,972 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:27,973 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:27,986 INFO L567 ElimStorePlain]: treesize reduction 5, result has 84.8 percent of original size [2019-11-23 20:48:27,987 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:27,987 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:77, output treesize:28 [2019-11-23 20:48:28,032 INFO L343 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2019-11-23 20:48:28,033 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2019-11-23 20:48:28,033 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,040 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:28,041 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,041 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:48:28,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:28,113 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,114 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,115 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,115 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:28,117 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,122 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:28,125 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,129 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2019-11-23 20:48:28,130 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,133 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:28,134 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,152 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2019-11-23 20:48:28,152 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,153 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:130, output treesize:35 [2019-11-23 20:48:28,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:28,200 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,201 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,201 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,202 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,203 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,203 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:28,213 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:28,215 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:28,217 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2019-11-23 20:48:28,218 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,223 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:28,224 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,243 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.1 percent of original size [2019-11-23 20:48:28,243 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,244 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:146, output treesize:41 [2019-11-23 20:48:28,328 INFO L343 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2019-11-23 20:48:28,328 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 37 [2019-11-23 20:48:28,329 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,336 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:28,337 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:28,337 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:26 [2019-11-23 20:48:28,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:28,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588708033] [2019-11-23 20:48:28,540 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:28,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884124894] [2019-11-23 20:48:28,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:28,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-23 20:48:28,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41821742] [2019-11-23 20:48:28,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:48:28,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:28,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:48:28,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:48:28,542 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 18 states. [2019-11-23 20:48:29,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:29,095 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-23 20:48:29,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:48:29,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2019-11-23 20:48:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:29,097 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:48:29,097 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:48:29,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:48:29,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:48:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2019-11-23 20:48:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:48:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-11-23 20:48:29,107 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 26 [2019-11-23 20:48:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:29,108 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-11-23 20:48:29,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:48:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-11-23 20:48:29,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:48:29,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:29,115 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:29,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:29,320 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:29,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2031628823, now seen corresponding path program 8 times [2019-11-23 20:48:29,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:29,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451760014] [2019-11-23 20:48:29,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:29,327 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:29,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535649951] [2019-11-23 20:48:29,327 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 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 20:48:29,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:48:29,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:29,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:48:29,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:29,450 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:29,451 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,549 INFO L567 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2019-11-23 20:48:29,552 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-11-23 20:48:29,552 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,587 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:29,587 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,588 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:21 [2019-11-23 20:48:29,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:29,660 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:29,661 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,676 INFO L343 Elim1Store]: treesize reduction 57, result has 20.8 percent of original size [2019-11-23 20:48:29,677 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2019-11-23 20:48:29,678 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,699 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.8 percent of original size [2019-11-23 20:48:29,700 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,700 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:109, output treesize:44 [2019-11-23 20:48:29,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:29,739 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:29,739 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,801 INFO L343 Elim1Store]: treesize reduction 10, result has 89.7 percent of original size [2019-11-23 20:48:29,802 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 118 [2019-11-23 20:48:29,803 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,839 INFO L567 ElimStorePlain]: treesize reduction 75, result has 33.0 percent of original size [2019-11-23 20:48:29,839 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,839 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:95, output treesize:37 [2019-11-23 20:48:29,911 INFO L343 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2019-11-23 20:48:29,911 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2019-11-23 20:48:29,912 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,924 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:29,924 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:29,924 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2019-11-23 20:48:29,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:29,999 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:29,999 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,180 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2019-11-23 20:48:30,181 INFO L343 Elim1Store]: treesize reduction 66, result has 78.1 percent of original size [2019-11-23 20:48:30,182 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 72 treesize of output 270 [2019-11-23 20:48:30,184 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,237 INFO L567 ElimStorePlain]: treesize reduction 277, result has 14.2 percent of original size [2019-11-23 20:48:30,237 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,237 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:148, output treesize:46 [2019-11-23 20:48:30,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:30,304 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,305 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,306 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,307 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,307 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,308 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,309 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,310 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,311 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,312 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:30,329 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:30,330 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:30,331 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2019-11-23 20:48:30,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,335 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:30,335 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,357 INFO L567 ElimStorePlain]: treesize reduction 5, result has 90.9 percent of original size [2019-11-23 20:48:30,358 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,358 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:164, output treesize:50 [2019-11-23 20:48:30,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:30,431 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:30,432 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,619 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2019-11-23 20:48:30,620 INFO L343 Elim1Store]: treesize reduction 66, result has 78.1 percent of original size [2019-11-23 20:48:30,620 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 72 treesize of output 270 [2019-11-23 20:48:30,622 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,674 INFO L567 ElimStorePlain]: treesize reduction 279, result has 13.6 percent of original size [2019-11-23 20:48:30,674 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,675 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:148, output treesize:44 [2019-11-23 20:48:30,796 INFO L343 Elim1Store]: treesize reduction 144, result has 15.3 percent of original size [2019-11-23 20:48:30,797 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 49 [2019-11-23 20:48:30,798 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,806 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:30,806 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:30,807 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:35 [2019-11-23 20:48:30,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:30,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451760014] [2019-11-23 20:48:30,916 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:30,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535649951] [2019-11-23 20:48:30,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:30,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-11-23 20:48:30,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722235553] [2019-11-23 20:48:30,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:48:30,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:48:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:48:30,918 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 20 states. [2019-11-23 20:48:32,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:32,241 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2019-11-23 20:48:32,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:48:32,243 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2019-11-23 20:48:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:32,244 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:48:32,244 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:48:32,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:48:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:48:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2019-11-23 20:48:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:48:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2019-11-23 20:48:32,255 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 26 [2019-11-23 20:48:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:32,256 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2019-11-23 20:48:32,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:48:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2019-11-23 20:48:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:48:32,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:32,257 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:32,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:32,461 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash -834763193, now seen corresponding path program 9 times [2019-11-23 20:48:32,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:32,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108779203] [2019-11-23 20:48:32,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:32,468 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:32,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762758256] [2019-11-23 20:48:32,468 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 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 20:48:37,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:48:37,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:37,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:48:37,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:37,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108779203] [2019-11-23 20:48:37,174 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:37,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762758256] [2019-11-23 20:48:37,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:37,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:48:37,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677976595] [2019-11-23 20:48:37,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:48:37,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:48:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:48:37,176 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 13 states. [2019-11-23 20:48:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:37,443 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2019-11-23 20:48:37,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:48:37,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-11-23 20:48:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:37,444 INFO L225 Difference]: With dead ends: 132 [2019-11-23 20:48:37,444 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 20:48:37,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:48:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 20:48:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 76. [2019-11-23 20:48:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:48:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2019-11-23 20:48:37,454 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 28 [2019-11-23 20:48:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:37,454 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2019-11-23 20:48:37,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:48:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2019-11-23 20:48:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:48:37,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:37,456 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:37,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:37,657 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:37,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2028619399, now seen corresponding path program 10 times [2019-11-23 20:48:37,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:37,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853068353] [2019-11-23 20:48:37,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:37,665 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:37,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430267895] [2019-11-23 20:48:37,665 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 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 20:48:37,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:48:37,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:37,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:48:37,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:37,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853068353] [2019-11-23 20:48:37,804 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:37,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430267895] [2019-11-23 20:48:37,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:37,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:48:37,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73497752] [2019-11-23 20:48:37,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:48:37,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:37,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:48:37,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:48:37,806 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 13 states. [2019-11-23 20:48:38,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:38,232 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2019-11-23 20:48:38,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:48:38,232 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-11-23 20:48:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:38,233 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:48:38,233 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:48:38,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:48:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:48:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 73. [2019-11-23 20:48:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:48:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2019-11-23 20:48:38,241 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 28 [2019-11-23 20:48:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:38,242 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2019-11-23 20:48:38,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:48:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2019-11-23 20:48:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:48:38,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:38,243 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:38,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:38,443 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:38,444 INFO L82 PathProgramCache]: Analyzing trace with hash -802396711, now seen corresponding path program 3 times [2019-11-23 20:48:38,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:38,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540030028] [2019-11-23 20:48:38,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:38,451 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:38,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435363561] [2019-11-23 20:48:38,451 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 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 20:48:38,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:48:38,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:38,575 WARN L253 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-23 20:48:38,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:38,632 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:48:38,633 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,642 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:38,642 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,642 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2019-11-23 20:48:38,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:38,680 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:38,684 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:38,685 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2019-11-23 20:48:38,686 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,689 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:38,689 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,707 INFO L567 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2019-11-23 20:48:38,707 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,708 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:116, output treesize:22 [2019-11-23 20:48:38,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:38,738 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:38,738 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,742 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:38,743 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:38,744 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2019-11-23 20:48:38,744 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,762 INFO L567 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2019-11-23 20:48:38,762 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,762 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:116, output treesize:22 [2019-11-23 20:48:38,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:38,794 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:38,794 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:38,795 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:38,796 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 39 [2019-11-23 20:48:38,796 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,803 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:38,803 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,825 INFO L567 ElimStorePlain]: treesize reduction 8, result has 76.5 percent of original size [2019-11-23 20:48:38,825 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:38,826 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:122, output treesize:26 [2019-11-23 20:48:38,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:39,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540030028] [2019-11-23 20:48:39,017 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:39,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435363561] [2019-11-23 20:48:39,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:39,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-11-23 20:48:39,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576665172] [2019-11-23 20:48:39,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:48:39,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:39,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:48:39,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:48:39,019 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 19 states. [2019-11-23 20:48:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:39,832 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2019-11-23 20:48:39,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:48:39,833 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2019-11-23 20:48:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:39,835 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:48:39,835 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:48:39,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:48:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:48:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:48:39,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:48:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2019-11-23 20:48:39,843 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 30 [2019-11-23 20:48:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:39,844 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2019-11-23 20:48:39,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:48:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2019-11-23 20:48:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:48:39,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:39,845 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:40,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:40,048 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 435427615, now seen corresponding path program 4 times [2019-11-23 20:48:40,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:40,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28981520] [2019-11-23 20:48:40,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:40,055 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:40,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132194938] [2019-11-23 20:48:40,056 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 20:48:40,146 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:48:40,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:48:40,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:48:40,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:48:40,164 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2019-11-23 20:48:40,165 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:40,187 INFO L567 ElimStorePlain]: treesize reduction 41, result has 36.9 percent of original size [2019-11-23 20:48:40,187 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-11-23 20:48:40,187 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:40,188 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:24 [2019-11-23 20:48:40,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:40,218 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:40,224 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2019-11-23 20:48:40,224 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:40,227 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:40,227 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,261 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-11-23 20:48:42,262 INFO L567 ElimStorePlain]: treesize reduction 5, result has 90.4 percent of original size [2019-11-23 20:48:42,262 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,262 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:115, output treesize:47 [2019-11-23 20:48:42,379 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-11-23 20:48:42,402 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,403 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,404 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,405 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:42,405 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2019-11-23 20:48:42,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,413 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:42,413 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,414 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2019-11-23 20:48:42,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:42,460 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,461 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,462 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,469 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,470 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,471 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,480 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,483 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 63 [2019-11-23 20:48:42,484 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,487 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:42,487 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,506 INFO L567 ElimStorePlain]: treesize reduction 5, result has 87.2 percent of original size [2019-11-23 20:48:42,506 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,507 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:140, output treesize:34 [2019-11-23 20:48:42,529 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:42,534 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,535 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,536 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,537 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,538 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,538 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:42,551 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:42,553 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,554 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 54 [2019-11-23 20:48:42,555 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,557 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:42,557 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,579 INFO L567 ElimStorePlain]: treesize reduction 5, result has 88.4 percent of original size [2019-11-23 20:48:42,579 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,579 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:140, output treesize:38 [2019-11-23 20:48:42,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:42,632 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,633 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,634 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,638 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,639 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:42,644 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:48:42,645 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,648 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2019-11-23 20:48:42,648 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,651 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 20:48:42,652 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,677 INFO L567 ElimStorePlain]: treesize reduction 5, result has 89.8 percent of original size [2019-11-23 20:48:42,677 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,678 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:152, output treesize:44 [2019-11-23 20:48:42,744 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,745 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,746 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:48:42,747 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:42,747 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 39 [2019-11-23 20:48:42,747 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,754 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:48:42,755 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:48:42,755 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:31 [2019-11-23 20:48:42,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:42,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:42,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:43,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:48:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:48:43,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28981520] [2019-11-23 20:48:43,085 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:48:43,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132194938] [2019-11-23 20:48:43,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:48:43,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-11-23 20:48:43,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120205787] [2019-11-23 20:48:43,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:48:43,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:48:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:48:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:48:43,086 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 21 states. [2019-11-23 20:48:43,687 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2019-11-23 20:48:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:48:43,822 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2019-11-23 20:48:43,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:48:43,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2019-11-23 20:48:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:48:43,823 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:48:43,823 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:48:43,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:48:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:48:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-23 20:48:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:48:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:48:43,829 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 30 [2019-11-23 20:48:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:48:43,829 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:48:43,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:48:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:48:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:48:43,830 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:48:43,830 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:48:44,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:48:44,031 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:48:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:48:44,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1233473381, now seen corresponding path program 11 times [2019-11-23 20:48:44,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:48:44,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975173716] [2019-11-23 20:48:44,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:48:44,037 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:48:44,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416773155] [2019-11-23 20:48:44,037 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