/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/reducercommutativity/rangesum40.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:27:23,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:27:23,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:27:23,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:27:23,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:27:23,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:27:23,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:27:23,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:27:23,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:27:23,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:27:23,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:27:23,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:27:23,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:27:23,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:27:23,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:27:23,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:27:23,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:27:23,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:27:23,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:27:23,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:27:23,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:27:23,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:27:23,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:27:23,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:27:23,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:27:23,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:27:23,868 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:27:23,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:27:23,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:27:23,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:27:23,870 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:27:23,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:27:23,870 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:27:23,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:27:23,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:27:23,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:27:23,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:27:23,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:27:23,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:27:23,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:27:23,872 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:27:23,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:27:23,872 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:27:23,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:27:23,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:27:23,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:27:23,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:27:23,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:27:23,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:27:23,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:27:23,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:27:23,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:27:23,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:27:23,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:27:23,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:27:23,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:27:24,159 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:27:24,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:27:24,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:27:24,179 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:27:24,179 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:27:24,181 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum40.i [2019-11-23 22:27:24,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4110d1962/ead49b53b6bb4757a5849278a3a9a12a/FLAGce64abbdf [2019-11-23 22:27:24,717 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:27:24,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum40.i [2019-11-23 22:27:24,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4110d1962/ead49b53b6bb4757a5849278a3a9a12a/FLAGce64abbdf [2019-11-23 22:27:25,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4110d1962/ead49b53b6bb4757a5849278a3a9a12a [2019-11-23 22:27:25,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:27:25,119 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:27:25,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:27:25,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:27:25,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:27:25,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b40b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25, skipping insertion in model container [2019-11-23 22:27:25,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:27:25,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:27:25,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:27:25,345 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:27:25,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:27:25,383 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:27:25,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25 WrapperNode [2019-11-23 22:27:25,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:27:25,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:27:25,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:27:25,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:27:25,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:27:25,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:27:25,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:27:25,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:27:25,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... [2019-11-23 22:27:25,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:27:25,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:27:25,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:27:25,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:27:25,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:27:25,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:27:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:27:25,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:27:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:27:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:27:25,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:27:25,997 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:27:25,998 INFO L284 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-23 22:27:25,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:25 BoogieIcfgContainer [2019-11-23 22:27:25,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:27:26,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:27:26,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:27:26,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:27:26,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:27:25" (1/3) ... [2019-11-23 22:27:26,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b571465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:26, skipping insertion in model container [2019-11-23 22:27:26,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:27:25" (2/3) ... [2019-11-23 22:27:26,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b571465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:27:26, skipping insertion in model container [2019-11-23 22:27:26,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:27:25" (3/3) ... [2019-11-23 22:27:26,007 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum40.i [2019-11-23 22:27:26,017 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:27:26,024 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:27:26,036 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:27:26,061 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:27:26,061 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:27:26,061 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:27:26,061 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:27:26,062 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:27:26,062 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:27:26,062 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:27:26,062 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:27:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-23 22:27:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:27:26,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:26,086 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:26,086 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:26,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-11-23 22:27:26,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:26,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58920361] [2019-11-23 22:27:26,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:27:26,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58920361] [2019-11-23 22:27:26,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:26,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:27:26,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350115398] [2019-11-23 22:27:26,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:27:26,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:27:26,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:27:26,252 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-23 22:27:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:26,270 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-11-23 22:27:26,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:27:26,272 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-23 22:27:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:26,282 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:27:26,283 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:27:26,286 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 22:27:26,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:27:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 22:27:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:27:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-23 22:27:26,324 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-11-23 22:27:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:26,325 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-23 22:27:26,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:27:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-23 22:27:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:27:26,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:26,327 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:26,327 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-11-23 22:27:26,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:26,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807061613] [2019-11-23 22:27:26,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:26,343 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:26,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638164233] [2019-11-23 22:27:26,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:26,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:27:26,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:27:26,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807061613] [2019-11-23 22:27:26,479 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:26,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638164233] [2019-11-23 22:27:26,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:26,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:26,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66756978] [2019-11-23 22:27:26,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:26,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:26,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:26,484 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-11-23 22:27:26,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:26,504 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-23 22:27:26,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:26,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:27:26,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:26,506 INFO L225 Difference]: With dead ends: 50 [2019-11-23 22:27:26,506 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:27:26,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 22:27:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:27:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:27:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:27:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-23 22:27:26,517 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-23 22:27:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:26,518 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-23 22:27:26,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-23 22:27:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:27:26,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:26,520 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:26,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:26,732 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-11-23 22:27:26,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:26,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499170332] [2019-11-23 22:27:26,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:26,765 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:26,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713957002] [2019-11-23 22:27:26,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:26,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:27:26,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:27:26,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499170332] [2019-11-23 22:27:26,836 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:26,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713957002] [2019-11-23 22:27:26,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:26,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:26,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540444373] [2019-11-23 22:27:26,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:26,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:26,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:26,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:26,839 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-23 22:27:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:26,900 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-11-23 22:27:26,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:26,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:27:26,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:26,902 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:27:26,902 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:27:26,903 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 22:27:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:27:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-23 22:27:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:27:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-23 22:27:26,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-11-23 22:27:26,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:26,910 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-23 22:27:26,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-23 22:27:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:27:26,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:26,912 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:27,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:27,124 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:27,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-11-23 22:27:27,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:27,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374772772] [2019-11-23 22:27:27,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:27,152 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:27,153 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068836623] [2019-11-23 22:27:27,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:27,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:27,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:27,251 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 22:27:27,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374772772] [2019-11-23 22:27:27,252 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:27,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068836623] [2019-11-23 22:27:27,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:27,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:27,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295695652] [2019-11-23 22:27:27,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:27,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:27,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:27,255 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-11-23 22:27:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:27,644 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-11-23 22:27:27,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:27,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-23 22:27:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:27,647 INFO L225 Difference]: With dead ends: 75 [2019-11-23 22:27:27,647 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:27:27,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 22:27:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:27:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-23 22:27:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:27:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-23 22:27:27,655 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-11-23 22:27:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:27,655 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-23 22:27:27,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-23 22:27:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:27:27,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:27,657 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:27,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:27,861 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-11-23 22:27:27,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:27,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975070818] [2019-11-23 22:27:27,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:27:27,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975070818] [2019-11-23 22:27:27,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:27,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:27:27,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43529240] [2019-11-23 22:27:27,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:27,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:27,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:27,934 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-11-23 22:27:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:28,028 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-11-23 22:27:28,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:28,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-23 22:27:28,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:28,029 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:27:28,029 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:27:28,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:27:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-23 22:27:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:27:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 22:27:28,036 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-11-23 22:27:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:28,037 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 22:27:28,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 22:27:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:27:28,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:28,038 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:28,038 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-11-23 22:27:28,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:28,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654661868] [2019-11-23 22:27:28,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:28,051 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:28,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147864044] [2019-11-23 22:27:28,052 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 22:27:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:28,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:27:28,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:27:28,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654661868] [2019-11-23 22:27:28,122 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:28,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147864044] [2019-11-23 22:27:28,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:28,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:27:28,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259916864] [2019-11-23 22:27:28,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:27:28,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:27:28,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:27:28,124 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-23 22:27:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:28,146 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-23 22:27:28,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:27:28,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-23 22:27:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:28,150 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:27:28,150 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 22:27:28,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 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 22:27:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 22:27:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 22:27:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 22:27:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-23 22:27:28,157 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-11-23 22:27:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:28,157 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-23 22:27:28,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:27:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-23 22:27:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 22:27:28,159 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:28,159 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:28,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:28,369 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-11-23 22:27:28,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:28,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637217016] [2019-11-23 22:27:28,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:28,381 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:28,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282095135] [2019-11-23 22:27:28,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:28,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:28,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:27:28,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637217016] [2019-11-23 22:27:28,471 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:28,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282095135] [2019-11-23 22:27:28,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:28,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:27:28,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550508702] [2019-11-23 22:27:28,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:28,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:28,473 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-11-23 22:27:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:28,496 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-23 22:27:28,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:28,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-23 22:27:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:28,498 INFO L225 Difference]: With dead ends: 78 [2019-11-23 22:27:28,498 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:27:28,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:27:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 22:27:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:27:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-23 22:27:28,504 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-11-23 22:27:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:28,504 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-23 22:27:28,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-23 22:27:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:27:28,505 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:28,506 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:28,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:28,711 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:28,711 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-11-23 22:27:28,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:28,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146680682] [2019-11-23 22:27:28,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:28,725 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:28,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635185794] [2019-11-23 22:27:28,725 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:28,786 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:28,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:28,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:28,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:27:28,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146680682] [2019-11-23 22:27:28,802 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:28,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635185794] [2019-11-23 22:27:28,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:28,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:27:28,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891436935] [2019-11-23 22:27:28,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:28,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:28,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:28,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:28,804 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-11-23 22:27:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:28,865 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-23 22:27:28,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:28,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-23 22:27:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:28,866 INFO L225 Difference]: With dead ends: 86 [2019-11-23 22:27:28,866 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:27:28,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:27:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-23 22:27:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:27:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-23 22:27:28,873 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-11-23 22:27:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:28,873 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-23 22:27:28,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-23 22:27:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:27:28,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:28,875 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:29,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,082 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-11-23 22:27:29,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:29,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966759493] [2019-11-23 22:27:29,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:29,096 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:29,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097652893] [2019-11-23 22:27:29,097 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:27:29,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:29,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:29,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 22:27:29,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966759493] [2019-11-23 22:27:29,197 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:29,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097652893] [2019-11-23 22:27:29,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:29,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 22:27:29,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528734781] [2019-11-23 22:27:29,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:29,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:29,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:29,199 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-11-23 22:27:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:29,223 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-11-23 22:27:29,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:29,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-23 22:27:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:29,227 INFO L225 Difference]: With dead ends: 70 [2019-11-23 22:27:29,227 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:27:29,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:27:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-23 22:27:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:27:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-11-23 22:27:29,241 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-11-23 22:27:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:29,241 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-11-23 22:27:29,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-11-23 22:27:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:27:29,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:29,243 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:29,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,445 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-11-23 22:27:29,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:29,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682531215] [2019-11-23 22:27:29,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:29,461 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:29,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669356704] [2019-11-23 22:27:29,462 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,535 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:29,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:29,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:29,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 22:27:29,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682531215] [2019-11-23 22:27:29,592 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:29,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669356704] [2019-11-23 22:27:29,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:29,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:27:29,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150395507] [2019-11-23 22:27:29,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:27:29,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:29,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:27:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:29,594 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-11-23 22:27:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:29,614 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2019-11-23 22:27:29,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:27:29,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-23 22:27:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:29,615 INFO L225 Difference]: With dead ends: 72 [2019-11-23 22:27:29,615 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:27:29,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 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 22:27:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:27:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 22:27:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:27:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2019-11-23 22:27:29,622 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 52 [2019-11-23 22:27:29,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:29,622 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2019-11-23 22:27:29,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:27:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2019-11-23 22:27:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:27:29,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:29,623 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:29,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:29,836 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:29,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1240765162, now seen corresponding path program 5 times [2019-11-23 22:27:29,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:29,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496273179] [2019-11-23 22:27:29,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:29,849 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:29,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601563482] [2019-11-23 22:27:29,850 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 22:27:29,927 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:27:29,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:29,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:29,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 22:27:29,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496273179] [2019-11-23 22:27:29,957 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:29,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601563482] [2019-11-23 22:27:29,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:29,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:27:29,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048181802] [2019-11-23 22:27:29,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:27:29,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:29,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:27:29,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:29,960 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 5 states. [2019-11-23 22:27:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:30,030 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2019-11-23 22:27:30,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:27:30,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2019-11-23 22:27:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:30,031 INFO L225 Difference]: With dead ends: 109 [2019-11-23 22:27:30,032 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:27:30,032 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 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 22:27:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:27:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-11-23 22:27:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:27:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2019-11-23 22:27:30,046 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 54 [2019-11-23 22:27:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:30,046 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2019-11-23 22:27:30,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:27:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2019-11-23 22:27:30,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:27:30,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:30,053 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:30,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:30,263 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:30,264 INFO L82 PathProgramCache]: Analyzing trace with hash -293355419, now seen corresponding path program 6 times [2019-11-23 22:27:30,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:30,265 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906704095] [2019-11-23 22:27:30,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:30,279 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:30,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441120314] [2019-11-23 22:27:30,281 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 22:27:30,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 22:27:30,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:30,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:27:30,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 22:27:30,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906704095] [2019-11-23 22:27:30,376 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:30,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441120314] [2019-11-23 22:27:30,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:27:30,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:27:30,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853334387] [2019-11-23 22:27:30,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:27:30,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:27:30,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:30,378 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 4 states. [2019-11-23 22:27:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:30,461 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2019-11-23 22:27:30,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:27:30,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-11-23 22:27:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:30,462 INFO L225 Difference]: With dead ends: 115 [2019-11-23 22:27:30,462 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:27:30,463 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:27:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:27:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-11-23 22:27:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:27:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-23 22:27:30,470 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 63 [2019-11-23 22:27:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:30,470 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-23 22:27:30,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:27:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-23 22:27:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:27:30,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:30,471 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:30,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:30,676 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:30,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2078383843, now seen corresponding path program 1 times [2019-11-23 22:27:30,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:30,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813254776] [2019-11-23 22:27:30,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:30,689 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:30,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759498354] [2019-11-23 22:27:30,690 INFO L94 rtionOrderModulation]: Keeping assertion order 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 22:27:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:30,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:30,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 22:27:30,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813254776] [2019-11-23 22:27:30,788 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:30,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759498354] [2019-11-23 22:27:30,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:30,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:27:30,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049072227] [2019-11-23 22:27:30,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:27:30,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:30,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:27:30,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:30,790 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 5 states. [2019-11-23 22:27:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:30,814 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2019-11-23 22:27:30,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:27:30,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-23 22:27:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:30,815 INFO L225 Difference]: With dead ends: 124 [2019-11-23 22:27:30,815 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:27:30,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 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 22:27:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:27:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:27:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:27:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2019-11-23 22:27:30,821 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2019-11-23 22:27:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:30,821 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2019-11-23 22:27:30,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:27:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2019-11-23 22:27:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:27:30,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:30,822 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:31,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:31,026 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1300385375, now seen corresponding path program 2 times [2019-11-23 22:27:31,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:31,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961406937] [2019-11-23 22:27:31,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:31,066 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:31,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929594161] [2019-11-23 22:27:31,066 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 22:27:31,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:31,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:31,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:27:31,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 22:27:31,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961406937] [2019-11-23 22:27:31,166 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:31,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929594161] [2019-11-23 22:27:31,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:31,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:27:31,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551817072] [2019-11-23 22:27:31,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:27:31,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:31,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:27:31,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:31,171 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 6 states. [2019-11-23 22:27:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:31,192 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2019-11-23 22:27:31,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:27:31,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2019-11-23 22:27:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:31,193 INFO L225 Difference]: With dead ends: 126 [2019-11-23 22:27:31,194 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 22:27:31,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 22:27:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-23 22:27:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 22:27:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-23 22:27:31,217 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 65 [2019-11-23 22:27:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:31,217 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-23 22:27:31,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:27:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-23 22:27:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:27:31,218 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:31,218 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:31,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:31,421 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1302328097, now seen corresponding path program 3 times [2019-11-23 22:27:31,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:31,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477295645] [2019-11-23 22:27:31,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:31,435 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:31,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731777373] [2019-11-23 22:27:31,435 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:31,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:27:31,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:31,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:27:31,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-23 22:27:31,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477295645] [2019-11-23 22:27:31,541 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:31,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731777373] [2019-11-23 22:27:31,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:31,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 22:27:31,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067614572] [2019-11-23 22:27:31,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:27:31,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:31,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:27:31,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:27:31,548 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 5 states. [2019-11-23 22:27:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:31,616 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2019-11-23 22:27:31,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:27:31,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2019-11-23 22:27:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:31,620 INFO L225 Difference]: With dead ends: 126 [2019-11-23 22:27:31,620 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 22:27:31,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 22:27:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 22:27:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2019-11-23 22:27:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:27:31,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-23 22:27:31,631 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 67 [2019-11-23 22:27:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:31,631 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-23 22:27:31,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:27:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-23 22:27:31,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:27:31,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:31,633 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:31,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:31,836 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:31,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:31,837 INFO L82 PathProgramCache]: Analyzing trace with hash -153484414, now seen corresponding path program 4 times [2019-11-23 22:27:31,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:31,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521719851] [2019-11-23 22:27:31,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:31,859 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:31,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415105460] [2019-11-23 22:27:31,860 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:31,934 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:31,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:31,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:27:31,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-23 22:27:31,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521719851] [2019-11-23 22:27:31,975 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:31,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415105460] [2019-11-23 22:27:31,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:31,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:27:31,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769896458] [2019-11-23 22:27:31,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:27:31,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:27:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:31,976 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 6 states. [2019-11-23 22:27:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:32,083 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2019-11-23 22:27:32,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:27:32,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 76 [2019-11-23 22:27:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:32,085 INFO L225 Difference]: With dead ends: 141 [2019-11-23 22:27:32,085 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 22:27:32,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 22:27:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2019-11-23 22:27:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:27:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2019-11-23 22:27:32,096 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 76 [2019-11-23 22:27:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:32,096 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2019-11-23 22:27:32,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:27:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2019-11-23 22:27:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:27:32,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:32,097 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:32,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:32,298 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:32,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:32,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1331355841, now seen corresponding path program 5 times [2019-11-23 22:27:32,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:32,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442234200] [2019-11-23 22:27:32,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:32,314 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:32,315 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621140632] [2019-11-23 22:27:32,315 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:32,406 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 22:27:32,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:32,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:27:32,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-23 22:27:32,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442234200] [2019-11-23 22:27:32,438 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:32,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621140632] [2019-11-23 22:27:32,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:32,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:27:32,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323574320] [2019-11-23 22:27:32,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:27:32,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:27:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:32,440 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 6 states. [2019-11-23 22:27:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:32,530 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2019-11-23 22:27:32,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:27:32,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2019-11-23 22:27:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:32,532 INFO L225 Difference]: With dead ends: 164 [2019-11-23 22:27:32,532 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:27:32,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:27:32,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2019-11-23 22:27:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 22:27:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2019-11-23 22:27:32,537 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 85 [2019-11-23 22:27:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:32,538 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2019-11-23 22:27:32,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:27:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2019-11-23 22:27:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 22:27:32,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:32,539 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:32,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:32,747 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:32,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2126533668, now seen corresponding path program 6 times [2019-11-23 22:27:32,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:32,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445007775] [2019-11-23 22:27:32,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:32,766 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:32,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731598893] [2019-11-23 22:27:32,767 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:48,260 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:27:48,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:48,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:27:48,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-23 22:27:48,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445007775] [2019-11-23 22:27:48,290 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:48,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731598893] [2019-11-23 22:27:48,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:48,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 22:27:48,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377343131] [2019-11-23 22:27:48,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:27:48,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:27:48,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:48,292 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 6 states. [2019-11-23 22:27:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:48,314 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2019-11-23 22:27:48,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:27:48,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2019-11-23 22:27:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:48,316 INFO L225 Difference]: With dead ends: 126 [2019-11-23 22:27:48,316 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 22:27:48,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:27:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 22:27:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-23 22:27:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 22:27:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2019-11-23 22:27:48,322 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 94 [2019-11-23 22:27:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:48,322 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2019-11-23 22:27:48,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:27:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2019-11-23 22:27:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 22:27:48,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:48,324 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:48,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:48,528 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:48,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1710600994, now seen corresponding path program 7 times [2019-11-23 22:27:48,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:48,529 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641021549] [2019-11-23 22:27:48,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:48,545 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:48,545 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710563364] [2019-11-23 22:27:48,545 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:48,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:27:48,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-23 22:27:48,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641021549] [2019-11-23 22:27:48,659 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:48,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710563364] [2019-11-23 22:27:48,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:48,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:27:48,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863363614] [2019-11-23 22:27:48,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:27:48,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:27:48,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:48,662 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand 7 states. [2019-11-23 22:27:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:48,695 INFO L93 Difference]: Finished difference Result 186 states and 212 transitions. [2019-11-23 22:27:48,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:27:48,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2019-11-23 22:27:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:48,697 INFO L225 Difference]: With dead ends: 186 [2019-11-23 22:27:48,697 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 22:27:48,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 22:27:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-23 22:27:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 22:27:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2019-11-23 22:27:48,703 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 96 [2019-11-23 22:27:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:48,703 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2019-11-23 22:27:48,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:27:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2019-11-23 22:27:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-23 22:27:48,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:48,704 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:48,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:48,908 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1078725088, now seen corresponding path program 8 times [2019-11-23 22:27:48,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:48,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565183205] [2019-11-23 22:27:48,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:48,920 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:48,920 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969723100] [2019-11-23 22:27:48,920 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:48,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:48,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:48,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:27:48,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-11-23 22:27:49,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565183205] [2019-11-23 22:27:49,043 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:49,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969723100] [2019-11-23 22:27:49,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:49,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:27:49,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778456645] [2019-11-23 22:27:49,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:27:49,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:27:49,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:49,045 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 8 states. [2019-11-23 22:27:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:49,076 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2019-11-23 22:27:49,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:27:49,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2019-11-23 22:27:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:49,077 INFO L225 Difference]: With dead ends: 188 [2019-11-23 22:27:49,077 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 22:27:49,078 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 22:27:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-11-23 22:27:49,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 22:27:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2019-11-23 22:27:49,083 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 98 [2019-11-23 22:27:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:49,083 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2019-11-23 22:27:49,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:27:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2019-11-23 22:27:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 22:27:49,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:49,084 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:49,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:49,288 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:49,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1561497186, now seen corresponding path program 9 times [2019-11-23 22:27:49,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:49,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940965958] [2019-11-23 22:27:49,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:49,309 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:49,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889530405] [2019-11-23 22:27:49,309 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:49,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:27:49,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:49,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:27:49,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-11-23 22:27:49,713 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940965958] [2019-11-23 22:27:49,713 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:49,714 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889530405] [2019-11-23 22:27:49,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:49,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:27:49,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850482414] [2019-11-23 22:27:49,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:27:49,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:49,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:27:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:49,715 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand 7 states. [2019-11-23 22:27:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:49,757 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2019-11-23 22:27:49,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:27:49,757 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2019-11-23 22:27:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:49,758 INFO L225 Difference]: With dead ends: 132 [2019-11-23 22:27:49,758 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:27:49,759 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:27:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 22:27:49,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 22:27:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2019-11-23 22:27:49,763 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 100 [2019-11-23 22:27:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:49,764 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2019-11-23 22:27:49,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:27:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2019-11-23 22:27:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 22:27:49,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:49,765 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:49,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:49,974 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:49,975 INFO L82 PathProgramCache]: Analyzing trace with hash -860969500, now seen corresponding path program 10 times [2019-11-23 22:27:49,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:49,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446106966] [2019-11-23 22:27:49,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:49,990 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:49,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455651669] [2019-11-23 22:27:49,990 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:50,050 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:50,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:50,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:27:50,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-11-23 22:27:50,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446106966] [2019-11-23 22:27:50,100 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:50,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455651669] [2019-11-23 22:27:50,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:50,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:27:50,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727994369] [2019-11-23 22:27:50,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:27:50,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:50,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:27:50,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:50,106 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand 8 states. [2019-11-23 22:27:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:50,139 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2019-11-23 22:27:50,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:27:50,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2019-11-23 22:27:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:50,142 INFO L225 Difference]: With dead ends: 134 [2019-11-23 22:27:50,142 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 22:27:50,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 22:27:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-11-23 22:27:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 22:27:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2019-11-23 22:27:50,147 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 102 [2019-11-23 22:27:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:50,148 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2019-11-23 22:27:50,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:27:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2019-11-23 22:27:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 22:27:50,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:50,149 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:50,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:50,349 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:50,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:50,350 INFO L82 PathProgramCache]: Analyzing trace with hash -979180314, now seen corresponding path program 11 times [2019-11-23 22:27:50,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:50,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834770496] [2019-11-23 22:27:50,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:50,359 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:50,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230296542] [2019-11-23 22:27:50,360 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:50,570 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-23 22:27:50,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:50,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:27:50,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 22:27:50,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834770496] [2019-11-23 22:27:50,629 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:50,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230296542] [2019-11-23 22:27:50,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:50,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:27:50,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645037122] [2019-11-23 22:27:50,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:27:50,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:27:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:50,631 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand 7 states. [2019-11-23 22:27:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:50,719 INFO L93 Difference]: Finished difference Result 195 states and 223 transitions. [2019-11-23 22:27:50,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:27:50,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2019-11-23 22:27:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:50,720 INFO L225 Difference]: With dead ends: 195 [2019-11-23 22:27:50,720 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 22:27:50,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:50,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 22:27:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2019-11-23 22:27:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 22:27:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2019-11-23 22:27:50,727 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 104 [2019-11-23 22:27:50,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:50,727 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2019-11-23 22:27:50,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:27:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2019-11-23 22:27:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 22:27:50,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:50,728 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:50,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:50,933 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1509437355, now seen corresponding path program 12 times [2019-11-23 22:27:50,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:50,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629569382] [2019-11-23 22:27:50,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:50,952 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:50,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966767261] [2019-11-23 22:27:50,952 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:54,713 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:27:54,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:54,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:27:54,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-11-23 22:27:54,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629569382] [2019-11-23 22:27:54,780 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:54,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966767261] [2019-11-23 22:27:54,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:54,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 22:27:54,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327018150] [2019-11-23 22:27:54,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:27:54,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:54,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:27:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:54,781 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand 8 states. [2019-11-23 22:27:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:54,898 INFO L93 Difference]: Finished difference Result 210 states and 238 transitions. [2019-11-23 22:27:54,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:27:54,899 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 113 [2019-11-23 22:27:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:54,900 INFO L225 Difference]: With dead ends: 210 [2019-11-23 22:27:54,900 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 22:27:54,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:27:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 22:27:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2019-11-23 22:27:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-23 22:27:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2019-11-23 22:27:54,906 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 113 [2019-11-23 22:27:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:54,907 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2019-11-23 22:27:54,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:27:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2019-11-23 22:27:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-23 22:27:54,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:54,908 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:55,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,113 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1377065658, now seen corresponding path program 13 times [2019-11-23 22:27:55,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:55,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428295968] [2019-11-23 22:27:55,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:55,124 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:55,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17862729] [2019-11-23 22:27:55,125 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:55,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:27:55,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-11-23 22:27:55,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428295968] [2019-11-23 22:27:55,256 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:55,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17862729] [2019-11-23 22:27:55,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:55,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:27:55,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123187584] [2019-11-23 22:27:55,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:27:55,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:55,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:27:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:55,258 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 9 states. [2019-11-23 22:27:55,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:55,298 INFO L93 Difference]: Finished difference Result 234 states and 260 transitions. [2019-11-23 22:27:55,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:27:55,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-11-23 22:27:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:55,301 INFO L225 Difference]: With dead ends: 234 [2019-11-23 22:27:55,301 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 22:27:55,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:55,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 22:27:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2019-11-23 22:27:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 22:27:55,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2019-11-23 22:27:55,307 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 122 [2019-11-23 22:27:55,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:55,307 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2019-11-23 22:27:55,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:27:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2019-11-23 22:27:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 22:27:55,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:55,309 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 7, 7, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:55,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,512 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1626162120, now seen corresponding path program 14 times [2019-11-23 22:27:55,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:55,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993661259] [2019-11-23 22:27:55,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:55,525 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:55,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728959581] [2019-11-23 22:27:55,525 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:55,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:55,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:27:55,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2019-11-23 22:27:55,673 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993661259] [2019-11-23 22:27:55,673 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:55,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728959581] [2019-11-23 22:27:55,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:55,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:27:55,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373733960] [2019-11-23 22:27:55,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:27:55,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:55,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:27:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:27:55,675 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 10 states. [2019-11-23 22:27:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:55,715 INFO L93 Difference]: Finished difference Result 236 states and 262 transitions. [2019-11-23 22:27:55,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:27:55,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2019-11-23 22:27:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:55,716 INFO L225 Difference]: With dead ends: 236 [2019-11-23 22:27:55,716 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 22:27:55,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:27:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 22:27:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-11-23 22:27:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-23 22:27:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2019-11-23 22:27:55,724 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 124 [2019-11-23 22:27:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:55,724 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2019-11-23 22:27:55,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:27:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2019-11-23 22:27:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-23 22:27:55,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:55,725 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:55,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:55,929 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1510033866, now seen corresponding path program 15 times [2019-11-23 22:27:55,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:55,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110591114] [2019-11-23 22:27:55,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:55,945 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:55,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153834694] [2019-11-23 22:27:55,946 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:27:58,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:58,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:27:58,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 62 proven. 15 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2019-11-23 22:27:58,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110591114] [2019-11-23 22:27:58,205 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:58,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153834694] [2019-11-23 22:27:58,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:58,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:27:58,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237044082] [2019-11-23 22:27:58,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:27:58,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:27:58,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:58,206 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 7 states. [2019-11-23 22:27:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:58,330 INFO L93 Difference]: Finished difference Result 221 states and 251 transitions. [2019-11-23 22:27:58,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:27:58,332 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-11-23 22:27:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:58,333 INFO L225 Difference]: With dead ends: 221 [2019-11-23 22:27:58,333 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 22:27:58,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:27:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 22:27:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2019-11-23 22:27:58,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 22:27:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2019-11-23 22:27:58,342 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 126 [2019-11-23 22:27:58,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:58,342 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2019-11-23 22:27:58,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:27:58,343 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2019-11-23 22:27:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 22:27:58,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:58,344 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:58,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,549 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash -478866573, now seen corresponding path program 16 times [2019-11-23 22:27:58,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:58,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686851182] [2019-11-23 22:27:58,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:58,569 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:58,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777779070] [2019-11-23 22:27:58,570 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:58,678 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:58,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:58,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:27:58,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 22:27:58,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686851182] [2019-11-23 22:27:58,795 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:58,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777779070] [2019-11-23 22:27:58,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:58,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:27:58,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108640660] [2019-11-23 22:27:58,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:27:58,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:58,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:27:58,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:27:58,798 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand 11 states. [2019-11-23 22:27:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:58,839 INFO L93 Difference]: Finished difference Result 256 states and 288 transitions. [2019-11-23 22:27:58,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:27:58,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2019-11-23 22:27:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:58,841 INFO L225 Difference]: With dead ends: 256 [2019-11-23 22:27:58,841 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 22:27:58,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:27:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 22:27:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 22:27:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 22:27:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2019-11-23 22:27:58,850 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 135 [2019-11-23 22:27:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:58,850 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2019-11-23 22:27:58,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:27:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2019-11-23 22:27:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 22:27:58,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:58,852 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:59,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:59,058 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:59,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1864669233, now seen corresponding path program 17 times [2019-11-23 22:27:59,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:59,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241998483] [2019-11-23 22:27:59,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:59,076 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:27:59,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060382463] [2019-11-23 22:27:59,076 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:59,865 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 22:27:59,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:59,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:27:59,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-23 22:27:59,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241998483] [2019-11-23 22:27:59,912 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:27:59,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060382463] [2019-11-23 22:27:59,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:27:59,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:27:59,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125462895] [2019-11-23 22:27:59,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:27:59,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:27:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:27:59,916 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand 9 states. [2019-11-23 22:28:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:00,040 INFO L93 Difference]: Finished difference Result 249 states and 283 transitions. [2019-11-23 22:28:00,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:28:00,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2019-11-23 22:28:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:00,042 INFO L225 Difference]: With dead ends: 249 [2019-11-23 22:28:00,043 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 22:28:00,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 22:28:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2019-11-23 22:28:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-23 22:28:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2019-11-23 22:28:00,050 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 137 [2019-11-23 22:28:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:00,050 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2019-11-23 22:28:00,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:28:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2019-11-23 22:28:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-23 22:28:00,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:00,051 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 7, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:00,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:00,256 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:00,257 INFO L82 PathProgramCache]: Analyzing trace with hash 332264690, now seen corresponding path program 18 times [2019-11-23 22:28:00,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:00,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517591153] [2019-11-23 22:28:00,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:00,283 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:00,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122823895] [2019-11-23 22:28:00,283 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:12,525 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:28:12,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:12,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:28:12,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 104 proven. 26 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2019-11-23 22:28:12,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517591153] [2019-11-23 22:28:12,607 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:12,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122823895] [2019-11-23 22:28:12,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:12,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:28:12,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637183549] [2019-11-23 22:28:12,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:28:12,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:12,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:28:12,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:12,609 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand 10 states. [2019-11-23 22:28:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:12,825 INFO L93 Difference]: Finished difference Result 253 states and 288 transitions. [2019-11-23 22:28:12,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:12,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2019-11-23 22:28:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:12,827 INFO L225 Difference]: With dead ends: 253 [2019-11-23 22:28:12,827 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 22:28:12,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 22:28:12,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2019-11-23 22:28:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 22:28:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 175 transitions. [2019-11-23 22:28:12,834 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 175 transitions. Word has length 146 [2019-11-23 22:28:12,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:12,835 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 175 transitions. [2019-11-23 22:28:12,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:28:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 175 transitions. [2019-11-23 22:28:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 22:28:12,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:12,836 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 9, 9, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:13,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:13,042 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1023035791, now seen corresponding path program 19 times [2019-11-23 22:28:13,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:13,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011610404] [2019-11-23 22:28:13,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:13,053 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:13,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225053777] [2019-11-23 22:28:13,053 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:13,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 22:28:13,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-11-23 22:28:13,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011610404] [2019-11-23 22:28:13,249 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:13,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225053777] [2019-11-23 22:28:13,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:13,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 22:28:13,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521377246] [2019-11-23 22:28:13,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:28:13,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:28:13,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:13,251 INFO L87 Difference]: Start difference. First operand 156 states and 175 transitions. Second operand 12 states. [2019-11-23 22:28:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:13,290 INFO L93 Difference]: Finished difference Result 294 states and 332 transitions. [2019-11-23 22:28:13,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:28:13,290 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 155 [2019-11-23 22:28:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:13,291 INFO L225 Difference]: With dead ends: 294 [2019-11-23 22:28:13,291 INFO L226 Difference]: Without dead ends: 159 [2019-11-23 22:28:13,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:28:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-23 22:28:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2019-11-23 22:28:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 22:28:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2019-11-23 22:28:13,297 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 155 [2019-11-23 22:28:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:13,297 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2019-11-23 22:28:13,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:28:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2019-11-23 22:28:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 22:28:13,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:13,299 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 10, 10, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:13,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:13,503 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:13,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1397097293, now seen corresponding path program 20 times [2019-11-23 22:28:13,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:13,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914357984] [2019-11-23 22:28:13,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:13,519 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:13,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525613004] [2019-11-23 22:28:13,520 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:13,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:13,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:13,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:28:13,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2019-11-23 22:28:13,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914357984] [2019-11-23 22:28:13,831 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:13,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525613004] [2019-11-23 22:28:13,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:13,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:28:13,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062343405] [2019-11-23 22:28:13,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:28:13,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:13,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:28:13,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:28:13,835 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 13 states. [2019-11-23 22:28:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:13,886 INFO L93 Difference]: Finished difference Result 296 states and 334 transitions. [2019-11-23 22:28:13,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:28:13,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 157 [2019-11-23 22:28:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:13,888 INFO L225 Difference]: With dead ends: 296 [2019-11-23 22:28:13,889 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 22:28:13,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:28:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 22:28:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-23 22:28:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 22:28:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 179 transitions. [2019-11-23 22:28:13,903 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 179 transitions. Word has length 157 [2019-11-23 22:28:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:13,903 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 179 transitions. [2019-11-23 22:28:13,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:28:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 179 transitions. [2019-11-23 22:28:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 22:28:13,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:13,905 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:14,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:14,110 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash 92947851, now seen corresponding path program 21 times [2019-11-23 22:28:14,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:14,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292054444] [2019-11-23 22:28:14,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:14,126 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:14,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869678414] [2019-11-23 22:28:14,126 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:18,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:28:18,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:18,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:28:18,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2019-11-23 22:28:18,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292054444] [2019-11-23 22:28:18,364 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:18,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869678414] [2019-11-23 22:28:18,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:18,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:28:18,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013567491] [2019-11-23 22:28:18,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:28:18,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:28:18,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:18,367 INFO L87 Difference]: Start difference. First operand 160 states and 179 transitions. Second operand 9 states. [2019-11-23 22:28:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:18,398 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2019-11-23 22:28:18,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:28:18,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 159 [2019-11-23 22:28:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:18,400 INFO L225 Difference]: With dead ends: 206 [2019-11-23 22:28:18,400 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 22:28:18,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:28:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 22:28:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 22:28:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 22:28:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2019-11-23 22:28:18,408 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 159 [2019-11-23 22:28:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:18,409 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2019-11-23 22:28:18,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:28:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2019-11-23 22:28:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 22:28:18,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:18,410 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 7, 7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:18,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:18,615 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:18,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1416460151, now seen corresponding path program 22 times [2019-11-23 22:28:18,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:18,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743154431] [2019-11-23 22:28:18,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:18,629 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:18,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687365149] [2019-11-23 22:28:18,629 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:18,711 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:18,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:18,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 22:28:18,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 679 trivial. 0 not checked. [2019-11-23 22:28:18,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743154431] [2019-11-23 22:28:18,838 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:18,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687365149] [2019-11-23 22:28:18,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:18,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-23 22:28:18,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456063550] [2019-11-23 22:28:18,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:28:18,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:28:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:28:18,840 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand 14 states. [2019-11-23 22:28:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:18,886 INFO L93 Difference]: Finished difference Result 302 states and 340 transitions. [2019-11-23 22:28:18,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:28:18,886 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 161 [2019-11-23 22:28:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:18,887 INFO L225 Difference]: With dead ends: 302 [2019-11-23 22:28:18,888 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 22:28:18,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:28:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 22:28:18,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 22:28:18,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 22:28:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 183 transitions. [2019-11-23 22:28:18,894 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 183 transitions. Word has length 161 [2019-11-23 22:28:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:18,895 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 183 transitions. [2019-11-23 22:28:18,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:28:18,895 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 183 transitions. [2019-11-23 22:28:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 22:28:18,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:18,896 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:19,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:19,100 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1095728071, now seen corresponding path program 23 times [2019-11-23 22:28:19,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:19,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241476183] [2019-11-23 22:28:19,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:19,113 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:19,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377097903] [2019-11-23 22:28:19,114 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:19,821 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 22:28:19,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:19,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:19,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 107 proven. 77 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2019-11-23 22:28:19,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241476183] [2019-11-23 22:28:19,891 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:19,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377097903] [2019-11-23 22:28:19,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:19,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:28:19,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166880993] [2019-11-23 22:28:19,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:28:19,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:28:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:19,892 INFO L87 Difference]: Start difference. First operand 164 states and 183 transitions. Second operand 10 states. [2019-11-23 22:28:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:20,017 INFO L93 Difference]: Finished difference Result 292 states and 332 transitions. [2019-11-23 22:28:20,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:20,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 163 [2019-11-23 22:28:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:20,019 INFO L225 Difference]: With dead ends: 292 [2019-11-23 22:28:20,019 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 22:28:20,019 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 22:28:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2019-11-23 22:28:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-23 22:28:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2019-11-23 22:28:20,025 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 163 [2019-11-23 22:28:20,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:20,026 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2019-11-23 22:28:20,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:28:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2019-11-23 22:28:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-23 22:28:20,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:20,027 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 8, 8, 8, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:20,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:20,228 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:20,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 527454420, now seen corresponding path program 24 times [2019-11-23 22:28:20,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:20,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108506127] [2019-11-23 22:28:20,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:20,240 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:20,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579387262] [2019-11-23 22:28:20,241 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:22,475 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-23 22:28:22,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:22,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:28:22,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2019-11-23 22:28:22,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108506127] [2019-11-23 22:28:22,558 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:22,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579387262] [2019-11-23 22:28:22,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:22,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:28:22,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943293240] [2019-11-23 22:28:22,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:28:22,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:22,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:28:22,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:22,559 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 11 states. [2019-11-23 22:28:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:22,708 INFO L93 Difference]: Finished difference Result 307 states and 347 transitions. [2019-11-23 22:28:22,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:28:22,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 172 [2019-11-23 22:28:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:22,710 INFO L225 Difference]: With dead ends: 307 [2019-11-23 22:28:22,710 INFO L226 Difference]: Without dead ends: 185 [2019-11-23 22:28:22,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:28:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-11-23 22:28:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2019-11-23 22:28:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-23 22:28:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2019-11-23 22:28:22,717 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 172 [2019-11-23 22:28:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:22,718 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2019-11-23 22:28:22,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:28:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2019-11-23 22:28:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-23 22:28:22,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:22,719 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 12, 9, 9, 9, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:22,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:22,924 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -529064089, now seen corresponding path program 25 times [2019-11-23 22:28:22,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:22,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198268400] [2019-11-23 22:28:22,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:22,936 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:22,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622285177] [2019-11-23 22:28:22,936 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:23,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:28:23,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2019-11-23 22:28:23,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198268400] [2019-11-23 22:28:23,154 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:23,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622285177] [2019-11-23 22:28:23,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:23,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 22:28:23,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885817488] [2019-11-23 22:28:23,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:28:23,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:23,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:28:23,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:23,156 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand 15 states. [2019-11-23 22:28:23,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:23,206 INFO L93 Difference]: Finished difference Result 340 states and 378 transitions. [2019-11-23 22:28:23,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:28:23,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 181 [2019-11-23 22:28:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:23,207 INFO L225 Difference]: With dead ends: 340 [2019-11-23 22:28:23,207 INFO L226 Difference]: Without dead ends: 185 [2019-11-23 22:28:23,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:28:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-11-23 22:28:23,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2019-11-23 22:28:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 22:28:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2019-11-23 22:28:23,215 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 181 [2019-11-23 22:28:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:23,215 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2019-11-23 22:28:23,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:28:23,216 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2019-11-23 22:28:23,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:28:23,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:23,217 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 9, 9, 9, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:23,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:23,420 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:23,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2118649765, now seen corresponding path program 26 times [2019-11-23 22:28:23,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:23,422 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339724367] [2019-11-23 22:28:23,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:23,433 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:23,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136851635] [2019-11-23 22:28:23,434 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:23,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:23,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:23,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:28:23,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2019-11-23 22:28:23,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339724367] [2019-11-23 22:28:23,666 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:23,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136851635] [2019-11-23 22:28:23,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:23,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:28:23,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842143524] [2019-11-23 22:28:23,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:28:23,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:23,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:28:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:23,667 INFO L87 Difference]: Start difference. First operand 184 states and 203 transitions. Second operand 16 states. [2019-11-23 22:28:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:23,721 INFO L93 Difference]: Finished difference Result 342 states and 380 transitions. [2019-11-23 22:28:23,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:23,721 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 183 [2019-11-23 22:28:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:23,722 INFO L225 Difference]: With dead ends: 342 [2019-11-23 22:28:23,722 INFO L226 Difference]: Without dead ends: 187 [2019-11-23 22:28:23,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-23 22:28:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2019-11-23 22:28:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 22:28:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 205 transitions. [2019-11-23 22:28:23,728 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 205 transitions. Word has length 183 [2019-11-23 22:28:23,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:23,728 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 205 transitions. [2019-11-23 22:28:23,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:28:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 205 transitions. [2019-11-23 22:28:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:28:23,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:23,730 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 9, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:23,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:23,934 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash -343943069, now seen corresponding path program 27 times [2019-11-23 22:28:23,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:23,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559549682] [2019-11-23 22:28:23,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:23,956 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:23,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409618402] [2019-11-23 22:28:23,956 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:28:25,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:25,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:28:25,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2019-11-23 22:28:25,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559549682] [2019-11-23 22:28:25,616 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:25,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409618402] [2019-11-23 22:28:25,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:25,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 22:28:25,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19606138] [2019-11-23 22:28:25,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:28:25,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:28:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:25,617 INFO L87 Difference]: Start difference. First operand 186 states and 205 transitions. Second operand 10 states. [2019-11-23 22:28:25,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:25,651 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2019-11-23 22:28:25,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:28:25,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 185 [2019-11-23 22:28:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:25,657 INFO L225 Difference]: With dead ends: 238 [2019-11-23 22:28:25,657 INFO L226 Difference]: Without dead ends: 189 [2019-11-23 22:28:25,658 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:28:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-23 22:28:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-23 22:28:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 22:28:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 207 transitions. [2019-11-23 22:28:25,663 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 207 transitions. Word has length 185 [2019-11-23 22:28:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:25,663 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 207 transitions. [2019-11-23 22:28:25,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:28:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 207 transitions. [2019-11-23 22:28:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 22:28:25,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:25,664 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 9, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:25,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,869 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:25,870 INFO L82 PathProgramCache]: Analyzing trace with hash 545275617, now seen corresponding path program 28 times [2019-11-23 22:28:25,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:25,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724314228] [2019-11-23 22:28:25,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:25,881 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:25,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133108719] [2019-11-23 22:28:25,882 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:25,976 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:28:25,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:25,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:28:25,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 834 trivial. 0 not checked. [2019-11-23 22:28:26,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724314228] [2019-11-23 22:28:26,139 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:26,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133108719] [2019-11-23 22:28:26,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:26,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-11-23 22:28:26,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489782885] [2019-11-23 22:28:26,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:28:26,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:28:26,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:26,141 INFO L87 Difference]: Start difference. First operand 188 states and 207 transitions. Second operand 16 states. [2019-11-23 22:28:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:26,371 INFO L93 Difference]: Finished difference Result 366 states and 418 transitions. [2019-11-23 22:28:26,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:28:26,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 187 [2019-11-23 22:28:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:26,373 INFO L225 Difference]: With dead ends: 366 [2019-11-23 22:28:26,373 INFO L226 Difference]: Without dead ends: 236 [2019-11-23 22:28:26,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:28:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-11-23 22:28:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2019-11-23 22:28:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-23 22:28:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 252 transitions. [2019-11-23 22:28:26,380 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 252 transitions. Word has length 187 [2019-11-23 22:28:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:26,380 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 252 transitions. [2019-11-23 22:28:26,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:28:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 252 transitions. [2019-11-23 22:28:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-23 22:28:26,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:26,382 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 14, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:26,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:26,585 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1211969018, now seen corresponding path program 29 times [2019-11-23 22:28:26,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:26,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682619954] [2019-11-23 22:28:26,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:26,600 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:26,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510403958] [2019-11-23 22:28:26,600 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:27,650 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-11-23 22:28:27,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:27,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:28:27,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 205 proven. 301 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2019-11-23 22:28:27,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682619954] [2019-11-23 22:28:27,788 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:28:27,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510403958] [2019-11-23 22:28:27,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:28:27,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 22:28:27,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155966122] [2019-11-23 22:28:27,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:28:27,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:27,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:28:27,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:28:27,789 INFO L87 Difference]: Start difference. First operand 233 states and 252 transitions. Second operand 17 states. [2019-11-23 22:28:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:28,001 INFO L93 Difference]: Finished difference Result 405 states and 445 transitions. [2019-11-23 22:28:28,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:28:28,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 232 [2019-11-23 22:28:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:28,003 INFO L225 Difference]: With dead ends: 405 [2019-11-23 22:28:28,003 INFO L226 Difference]: Without dead ends: 245 [2019-11-23 22:28:28,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:28:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2019-11-23 22:28:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2019-11-23 22:28:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-11-23 22:28:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 261 transitions. [2019-11-23 22:28:28,009 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 261 transitions. Word has length 232 [2019-11-23 22:28:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:28,009 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 261 transitions. [2019-11-23 22:28:28,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:28:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 261 transitions. [2019-11-23 22:28:28,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-23 22:28:28,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:28,011 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 15, 15, 15, 14, 14, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:28,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:28,217 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:28,218 INFO L82 PathProgramCache]: Analyzing trace with hash -674227903, now seen corresponding path program 30 times [2019-11-23 22:28:28,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:28,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234575596] [2019-11-23 22:28:28,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:28,232 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:28:28,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067589750] [2019-11-23 22:28:28,233 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true