/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:34:58,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:34:58,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:34:58,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:34:58,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:34:58,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:34:58,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:34:58,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:34:58,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:34:58,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:34:58,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:34:58,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:34:58,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:34:58,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:34:58,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:34:58,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:34:58,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:34:58,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:34:58,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:34:58,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:34:58,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:34:58,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:34:58,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:34:58,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:34:58,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:34:58,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:34:58,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:34:58,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:34:58,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:34:58,568 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:34:58,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:34:58,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:34:58,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:34:58,574 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:34:58,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:34:58,575 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:34:58,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:34:58,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:34:58,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:34:58,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:34:58,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:34:58,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:34:58,577 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:34:58,577 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:34:58,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:34:58,577 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:34:58,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:34:58,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:34:58,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:34:58,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:34:58,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:34:58,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:34:58,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:34:58,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:34:58,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:34:58,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:34:58,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:34:58,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:34:58,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:34:58,895 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:34:58,915 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:34:58,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:34:58,924 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:34:58,925 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:34:58,926 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i [2019-11-23 20:34:59,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae77d80b/70cc5119bb5642a78a88bef0a0d5c32f/FLAGe6a01f701 [2019-11-23 20:34:59,479 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:34:59,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i [2019-11-23 20:34:59,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae77d80b/70cc5119bb5642a78a88bef0a0d5c32f/FLAGe6a01f701 [2019-11-23 20:34:59,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ae77d80b/70cc5119bb5642a78a88bef0a0d5c32f [2019-11-23 20:34:59,905 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:34:59,907 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:34:59,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:34:59,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:34:59,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:34:59,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62084658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59, skipping insertion in model container [2019-11-23 20:34:59,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:59" (1/1) ... [2019-11-23 20:34:59,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:34:59,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:35:00,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:00,145 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:35:00,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:00,181 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:35:00,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00 WrapperNode [2019-11-23 20:35:00,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:00,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:00,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:35:00,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:35:00,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:00,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:35:00,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:35:00,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:35:00,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... [2019-11-23 20:35:00,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:35:00,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:35:00,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:35:00,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:35:00,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:35:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:35:00,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:35:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:35:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:35:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:35:00,618 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:35:00,619 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:35:00,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:00 BoogieIcfgContainer [2019-11-23 20:35:00,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:35:00,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:35:00,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:35:00,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:35:00,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:59" (1/3) ... [2019-11-23 20:35:00,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb6177d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:00, skipping insertion in model container [2019-11-23 20:35:00,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:00" (2/3) ... [2019-11-23 20:35:00,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb6177d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:00, skipping insertion in model container [2019-11-23 20:35:00,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:00" (3/3) ... [2019-11-23 20:35:00,629 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2019-11-23 20:35:00,640 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:35:00,648 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:35:00,664 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:35:00,696 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:35:00,697 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:35:00,697 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:35:00,697 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:35:00,698 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:35:00,698 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:35:00,698 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:35:00,698 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:35:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 20:35:00,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:35:00,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:00,728 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:00,729 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash 254868323, now seen corresponding path program 1 times [2019-11-23 20:35:00,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:00,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994511407] [2019-11-23 20:35:00,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:00,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994511407] [2019-11-23 20:35:00,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:00,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:35:00,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913502164] [2019-11-23 20:35:00,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:35:00,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:00,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:35:00,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:35:00,928 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-23 20:35:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:00,943 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2019-11-23 20:35:00,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:35:00,945 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:35:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:00,954 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:35:00,954 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 20:35:00,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:35:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 20:35:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 20:35:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:35:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2019-11-23 20:35:00,986 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2019-11-23 20:35:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:00,987 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2019-11-23 20:35:00,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:35:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2019-11-23 20:35:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:35:00,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:00,988 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:00,989 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1105866364, now seen corresponding path program 1 times [2019-11-23 20:35:00,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:00,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892887739] [2019-11-23 20:35:00,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:01,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892887739] [2019-11-23 20:35:01,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:01,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:01,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759968706] [2019-11-23 20:35:01,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:01,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:01,045 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2019-11-23 20:35:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:01,062 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 20:35:01,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:01,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:35:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:01,064 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:35:01,064 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 20:35:01,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 20:35:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 20:35:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:35:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-23 20:35:01,069 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2019-11-23 20:35:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:01,070 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-23 20:35:01,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-23 20:35:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:35:01,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:01,071 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:01,071 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:01,072 INFO L82 PathProgramCache]: Analyzing trace with hash -743314847, now seen corresponding path program 1 times [2019-11-23 20:35:01,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:01,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805986963] [2019-11-23 20:35:01,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:01,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805986963] [2019-11-23 20:35:01,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995078838] [2019-11-23 20:35:01,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:01,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:01,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:01,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:01,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:35:01,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636656608] [2019-11-23 20:35:01,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:35:01,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:35:01,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:01,247 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 5 states. [2019-11-23 20:35:01,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:01,266 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-23 20:35:01,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:35:01,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-23 20:35:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:01,268 INFO L225 Difference]: With dead ends: 25 [2019-11-23 20:35:01,268 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:35:01,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:35:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:35:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:35:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:35:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 20:35:01,273 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2019-11-23 20:35:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:01,274 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 20:35:01,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:35:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 20:35:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:35:01,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:01,275 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:01,486 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:01,487 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2061609756, now seen corresponding path program 2 times [2019-11-23 20:35:01,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:01,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314549370] [2019-11-23 20:35:01,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:01,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314549370] [2019-11-23 20:35:01,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113476345] [2019-11-23 20:35:01,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:01,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:35:01,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:01,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:01,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:01,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:35:01,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-23 20:35:01,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086006032] [2019-11-23 20:35:01,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:35:01,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:35:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:01,666 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2019-11-23 20:35:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:01,695 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-23 20:35:01,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:35:01,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 20:35:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:01,697 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:35:01,697 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:35:01,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:35:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 20:35:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:35:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 20:35:01,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2019-11-23 20:35:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:01,703 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 20:35:01,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:35:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 20:35:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:35:01,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:01,704 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:01,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:01,913 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1853246190, now seen corresponding path program 1 times [2019-11-23 20:35:01,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:01,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669270802] [2019-11-23 20:35:01,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:02,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669270802] [2019-11-23 20:35:02,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978337431] [2019-11-23 20:35:02,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:02,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:35:02,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:02,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:02,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:35:02,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534910307] [2019-11-23 20:35:02,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:35:02,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:02,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:35:02,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:02,101 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2019-11-23 20:35:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:02,126 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-23 20:35:02,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:35:02,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-23 20:35:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:02,128 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:35:02,128 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:35:02,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:35:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 20:35:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:35:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-23 20:35:02,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2019-11-23 20:35:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:02,133 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-23 20:35:02,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:35:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-23 20:35:02,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:35:02,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:02,134 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:02,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,339 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash -2112801239, now seen corresponding path program 2 times [2019-11-23 20:35:02,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:02,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797227237] [2019-11-23 20:35:02,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:02,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797227237] [2019-11-23 20:35:02,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395440962] [2019-11-23 20:35:02,417 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,470 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:02,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:02,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:02,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:02,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:02,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:35:02,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920133759] [2019-11-23 20:35:02,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:35:02,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:02,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:35:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:02,492 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 7 states. [2019-11-23 20:35:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:02,526 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-23 20:35:02,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:35:02,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-23 20:35:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:02,528 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:35:02,528 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:35:02,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:35:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:35:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:35:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-23 20:35:02,533 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 16 [2019-11-23 20:35:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:02,533 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-23 20:35:02,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:35:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-23 20:35:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:35:02,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:02,534 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:02,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,737 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:02,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:02,738 INFO L82 PathProgramCache]: Analyzing trace with hash -506219954, now seen corresponding path program 3 times [2019-11-23 20:35:02,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:02,739 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566740577] [2019-11-23 20:35:02,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:02,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566740577] [2019-11-23 20:35:02,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780524999] [2019-11-23 20:35:02,846 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:02,891 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:35:02,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:02,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:35:02,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:02,949 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:02,950 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:02,964 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:02,965 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:02,965 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:35:03,004 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-11-23 20:35:03,005 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:03,016 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:03,016 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:03,017 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-11-23 20:35:03,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:35:03,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:03,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:35:03,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209243282] [2019-11-23 20:35:03,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:35:03,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:03,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:35:03,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:35:03,103 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 11 states. [2019-11-23 20:35:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:03,365 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2019-11-23 20:35:03,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:35:03,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-11-23 20:35:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:03,366 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:35:03,366 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:35:03,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:35:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:35:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2019-11-23 20:35:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:35:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-23 20:35:03,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 17 [2019-11-23 20:35:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:03,372 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-23 20:35:03,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:35:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-23 20:35:03,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:35:03,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:03,374 INFO L410 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:03,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:03,584 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:03,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:03,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1687448065, now seen corresponding path program 1 times [2019-11-23 20:35:03,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:03,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092846259] [2019-11-23 20:35:03,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:35:03,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092846259] [2019-11-23 20:35:03,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582657636] [2019-11-23 20:35:03,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:03,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:35:03,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:35:03,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:03,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:35:03,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220812991] [2019-11-23 20:35:03,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:35:03,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:03,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:35:03,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:03,760 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 9 states. [2019-11-23 20:35:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:03,780 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2019-11-23 20:35:03,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:35:03,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-11-23 20:35:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:03,782 INFO L225 Difference]: With dead ends: 39 [2019-11-23 20:35:03,782 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:35:03,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:35:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 20:35:03,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:35:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:35:03,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 22 [2019-11-23 20:35:03,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:03,788 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:35:03,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:35:03,788 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:35:03,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:35:03,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:03,789 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:03,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:03,994 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:03,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash -878206364, now seen corresponding path program 2 times [2019-11-23 20:35:03,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:03,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107172923] [2019-11-23 20:35:03,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:35:04,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107172923] [2019-11-23 20:35:04,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940021940] [2019-11-23 20:35:04,132 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:04,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:04,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:04,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:35:04,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:04,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:35:04,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038074411] [2019-11-23 20:35:04,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:35:04,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:35:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:04,217 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 10 states. [2019-11-23 20:35:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:04,256 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-11-23 20:35:04,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:35:04,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-23 20:35:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:04,259 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:35:04,259 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:35:04,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:35:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 20:35:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:35:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-23 20:35:04,268 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 23 [2019-11-23 20:35:04,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:04,269 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-23 20:35:04,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:35:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-23 20:35:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:35:04,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:04,272 INFO L410 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:04,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,478 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:04,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1561517409, now seen corresponding path program 3 times [2019-11-23 20:35:04,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:04,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946010945] [2019-11-23 20:35:04,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:35:04,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946010945] [2019-11-23 20:35:04,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28388103] [2019-11-23 20:35:04,571 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:04,613 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:35:04,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:04,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:04,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:35:04,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:04,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-23 20:35:04,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859265801] [2019-11-23 20:35:04,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:35:04,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:04,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:35:04,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:35:04,686 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 14 states. [2019-11-23 20:35:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:04,883 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-11-23 20:35:04,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:35:04,884 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-11-23 20:35:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:04,885 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:35:04,885 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:35:04,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:35:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:35:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 20:35:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:35:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-23 20:35:04,891 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 24 [2019-11-23 20:35:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:04,891 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-23 20:35:04,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:35:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-23 20:35:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:35:04,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:04,892 INFO L410 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:05,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:05,100 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1832946034, now seen corresponding path program 4 times [2019-11-23 20:35:05,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:05,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117014888] [2019-11-23 20:35:05,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:05,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117014888] [2019-11-23 20:35:05,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876962906] [2019-11-23 20:35:05,238 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:05,297 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:05,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:05,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:35:05,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:05,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:05,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:35:05,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615433732] [2019-11-23 20:35:05,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:35:05,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:05,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:35:05,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:35:05,318 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 12 states. [2019-11-23 20:35:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:05,346 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-11-23 20:35:05,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:35:05,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-23 20:35:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:05,351 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:35:05,351 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:35:05,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:35:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:35:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 20:35:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:35:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-23 20:35:05,362 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 28 [2019-11-23 20:35:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:05,362 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-23 20:35:05,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:35:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-23 20:35:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:35:05,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:05,363 INFO L410 BasicCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:05,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:05,569 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:05,569 INFO L82 PathProgramCache]: Analyzing trace with hash 706278935, now seen corresponding path program 5 times [2019-11-23 20:35:05,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:05,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350598755] [2019-11-23 20:35:05,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:05,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350598755] [2019-11-23 20:35:05,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963606623] [2019-11-23 20:35:05,732 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:05,867 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:35:05,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:05,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:35:05,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:05,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:05,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:35:05,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768310426] [2019-11-23 20:35:05,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:05,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:05,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:05,883 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 13 states. [2019-11-23 20:35:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:05,909 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-11-23 20:35:05,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:35:05,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-23 20:35:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:05,911 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:35:05,911 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:35:05,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:35:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 20:35:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:35:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-11-23 20:35:05,918 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 29 [2019-11-23 20:35:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:05,918 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-11-23 20:35:05,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:05,918 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-11-23 20:35:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:35:05,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:05,920 INFO L410 BasicCegarLoop]: trace histogram [10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:06,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:06,121 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:06,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:06,122 INFO L82 PathProgramCache]: Analyzing trace with hash 139337234, now seen corresponding path program 6 times [2019-11-23 20:35:06,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:06,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050794534] [2019-11-23 20:35:06,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:35:06,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050794534] [2019-11-23 20:35:06,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005246037] [2019-11-23 20:35:06,238 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:06,296 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:35:06,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:06,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:35:06,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:06,307 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:06,308 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:06,314 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:06,314 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:06,314 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:35:06,382 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:35:06,383 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:06,409 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:06,410 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:06,410 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:35:06,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:35:06,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:06,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2019-11-23 20:35:06,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838839946] [2019-11-23 20:35:06,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:35:06,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:06,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:35:06,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:35:06,550 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 21 states. [2019-11-23 20:35:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:07,095 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2019-11-23 20:35:07,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:35:07,096 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2019-11-23 20:35:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:07,096 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:35:07,096 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:35:07,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:35:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:35:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2019-11-23 20:35:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:35:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-11-23 20:35:07,103 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 30 [2019-11-23 20:35:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:07,103 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-11-23 20:35:07,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:35:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-11-23 20:35:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:35:07,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:07,104 INFO L410 BasicCegarLoop]: trace histogram [11, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:07,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:07,305 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash 830717151, now seen corresponding path program 7 times [2019-11-23 20:35:07,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:07,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601060732] [2019-11-23 20:35:07,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:35:07,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601060732] [2019-11-23 20:35:07,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549434803] [2019-11-23 20:35:07,444 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:07,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:35:07,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:35:07,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:07,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:35:07,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836803949] [2019-11-23 20:35:07,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:35:07,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:07,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:35:07,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:07,523 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 15 states. [2019-11-23 20:35:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:07,551 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2019-11-23 20:35:07,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:35:07,552 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2019-11-23 20:35:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:07,552 INFO L225 Difference]: With dead ends: 67 [2019-11-23 20:35:07,552 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:35:07,553 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:35:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:35:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 20:35:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:35:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-11-23 20:35:07,566 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 34 [2019-11-23 20:35:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:07,566 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-11-23 20:35:07,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:35:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-11-23 20:35:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:35:07,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:07,567 INFO L410 BasicCegarLoop]: trace histogram [12, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:07,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:07,772 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash 633297348, now seen corresponding path program 8 times [2019-11-23 20:35:07,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:07,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701376238] [2019-11-23 20:35:07,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:35:07,934 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701376238] [2019-11-23 20:35:07,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314903021] [2019-11-23 20:35:07,935 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:07,992 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:07,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:07,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:35:07,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:35:08,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:08,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:35:08,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002691478] [2019-11-23 20:35:08,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:35:08,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:08,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:35:08,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:08,020 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 16 states. [2019-11-23 20:35:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:08,052 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-11-23 20:35:08,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:35:08,052 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-23 20:35:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:08,052 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:35:08,053 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:35:08,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:35:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:35:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 20:35:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:35:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2019-11-23 20:35:08,059 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2019-11-23 20:35:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:08,060 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2019-11-23 20:35:08,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:35:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2019-11-23 20:35:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:35:08,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:08,061 INFO L410 BasicCegarLoop]: trace histogram [13, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:08,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:08,265 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1191749249, now seen corresponding path program 9 times [2019-11-23 20:35:08,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:08,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625943624] [2019-11-23 20:35:08,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:35:08,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625943624] [2019-11-23 20:35:08,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555427557] [2019-11-23 20:35:08,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:08,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:35:08,508 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:08,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:35:08,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:08,523 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:08,523 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:08,536 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:08,537 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:08,537 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:08,590 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:35:08,591 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:08,600 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:08,600 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:08,601 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:35:08,646 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:35:08,663 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:08,664 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 74 [2019-11-23 20:35:08,665 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:08,704 INFO L567 ElimStorePlain]: treesize reduction 38, result has 54.2 percent of original size [2019-11-23 20:35:08,705 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:35:08,705 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-23 20:35:08,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:08,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:35:08,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:08,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2019-11-23 20:35:08,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600513177] [2019-11-23 20:35:08,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:35:08,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:08,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:35:08,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:35:08,998 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 24 states. [2019-11-23 20:35:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:09,972 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2019-11-23 20:35:09,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:35:09,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 36 [2019-11-23 20:35:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:09,973 INFO L225 Difference]: With dead ends: 84 [2019-11-23 20:35:09,973 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:35:09,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=421, Invalid=1471, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:35:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:35:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2019-11-23 20:35:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:35:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-11-23 20:35:09,981 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 36 [2019-11-23 20:35:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:09,981 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-11-23 20:35:09,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:35:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-11-23 20:35:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:35:09,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:09,983 INFO L410 BasicCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:10,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:10,187 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash -496583160, now seen corresponding path program 10 times [2019-11-23 20:35:10,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:10,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843432363] [2019-11-23 20:35:10,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:35:10,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843432363] [2019-11-23 20:35:10,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942600981] [2019-11-23 20:35:10,356 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:10,407 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:10,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:10,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:35:10,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:10,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:10,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2019-11-23 20:35:10,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211981874] [2019-11-23 20:35:10,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:35:10,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:35:10,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:35:10,515 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 23 states. [2019-11-23 20:35:10,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:10,875 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2019-11-23 20:35:10,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:35:10,876 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2019-11-23 20:35:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:10,876 INFO L225 Difference]: With dead ends: 75 [2019-11-23 20:35:10,876 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:35:10,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:35:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:35:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 20:35:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:35:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-11-23 20:35:10,883 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 38 [2019-11-23 20:35:10,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:10,883 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-11-23 20:35:10,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:35:10,883 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-11-23 20:35:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:35:10,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:10,884 INFO L410 BasicCegarLoop]: trace histogram [15, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:11,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:11,093 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:11,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1665429931, now seen corresponding path program 11 times [2019-11-23 20:35:11,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:11,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287219727] [2019-11-23 20:35:11,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:35:11,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287219727] [2019-11-23 20:35:11,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792142639] [2019-11-23 20:35:11,256 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:11,957 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-23 20:35:11,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:11,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:35:11,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:35:11,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:11,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:35:11,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666888152] [2019-11-23 20:35:11,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:35:11,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:11,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:35:11,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:11,986 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 19 states. [2019-11-23 20:35:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:12,035 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2019-11-23 20:35:12,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:35:12,036 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2019-11-23 20:35:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:12,036 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:35:12,036 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:35:12,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:35:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:35:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:35:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:35:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-23 20:35:12,042 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 42 [2019-11-23 20:35:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:12,042 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-23 20:35:12,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:35:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-23 20:35:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:35:12,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:12,043 INFO L410 BasicCegarLoop]: trace histogram [16, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:12,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,244 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2060613178, now seen corresponding path program 12 times [2019-11-23 20:35:12,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:12,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168402808] [2019-11-23 20:35:12,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:35:12,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168402808] [2019-11-23 20:35:12,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606761407] [2019-11-23 20:35:12,433 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:12,705 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:35:12,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:12,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:35:12,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:12,715 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:12,715 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:12,721 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:12,722 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:12,722 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:12,815 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2019-11-23 20:35:12,816 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:12,826 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:12,827 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:35:12,827 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-11-23 20:35:12,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:13,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:35:13,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:13,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2019-11-23 20:35:13,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053224937] [2019-11-23 20:35:13,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:35:13,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:35:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:35:13,077 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 28 states. [2019-11-23 20:35:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,043 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2019-11-23 20:35:14,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:35:14,044 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 43 [2019-11-23 20:35:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,044 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:35:14,045 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:35:14,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=604, Invalid=1946, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:35:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:35:14,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2019-11-23 20:35:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:35:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-11-23 20:35:14,060 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 43 [2019-11-23 20:35:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,061 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-11-23 20:35:14,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:35:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-11-23 20:35:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:35:14,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,065 INFO L410 BasicCegarLoop]: trace histogram [17, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,266 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1679296819, now seen corresponding path program 13 times [2019-11-23 20:35:14,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602902111] [2019-11-23 20:35:14,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:35:14,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602902111] [2019-11-23 20:35:14,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21432477] [2019-11-23 20:35:14,472 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 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 20:35:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:14,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:35:14,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:35:14,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:14,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:35:14,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969214986] [2019-11-23 20:35:14,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:35:14,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:14,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:35:14,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:35:14,540 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 21 states. [2019-11-23 20:35:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:14,570 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-11-23 20:35:14,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:35:14,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2019-11-23 20:35:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:14,571 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:35:14,571 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:35:14,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:35:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:35:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 20:35:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:35:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2019-11-23 20:35:14,576 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 47 [2019-11-23 20:35:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:14,577 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2019-11-23 20:35:14,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:35:14,577 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2019-11-23 20:35:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:35:14,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:14,578 INFO L410 BasicCegarLoop]: trace histogram [18, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:14,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:14,778 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:14,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:14,779 INFO L82 PathProgramCache]: Analyzing trace with hash -774949368, now seen corresponding path program 14 times [2019-11-23 20:35:14,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:14,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924757519] [2019-11-23 20:35:14,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:35:15,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924757519] [2019-11-23 20:35:15,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167114707] [2019-11-23 20:35:15,004 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 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 20:35:15,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:15,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:15,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:35:15,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:35:15,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:15,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:35:15,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704923578] [2019-11-23 20:35:15,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:35:15,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:15,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:35:15,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:35:15,078 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand 22 states. [2019-11-23 20:35:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:15,116 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2019-11-23 20:35:15,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:35:15,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2019-11-23 20:35:15,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:15,117 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:35:15,117 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:35:15,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:35:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:35:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-23 20:35:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:35:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-11-23 20:35:15,123 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 48 [2019-11-23 20:35:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:15,123 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-11-23 20:35:15,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:35:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-11-23 20:35:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:35:15,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:15,124 INFO L410 BasicCegarLoop]: trace histogram [19, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:15,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:15,328 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:15,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1490017837, now seen corresponding path program 15 times [2019-11-23 20:35:15,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:15,329 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058714415] [2019-11-23 20:35:15,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:35:15,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058714415] [2019-11-23 20:35:15,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503457453] [2019-11-23 20:35:15,549 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 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 20:35:15,643 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:35:15,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:15,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:35:15,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:15,654 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:15,655 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:15,659 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:15,660 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:15,660 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:15,739 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:35:15,740 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:15,753 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:15,753 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:15,753 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:35:15,804 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:35:15,818 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:15,818 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 74 [2019-11-23 20:35:15,819 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:15,853 INFO L567 ElimStorePlain]: treesize reduction 38, result has 54.2 percent of original size [2019-11-23 20:35:15,854 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:35:15,855 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-23 20:35:16,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:16,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-23 20:35:16,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:16,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2019-11-23 20:35:16,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732873888] [2019-11-23 20:35:16,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:35:16,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:16,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:35:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:35:16,228 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 32 states. [2019-11-23 20:35:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:17,829 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2019-11-23 20:35:17,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:35:17,834 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 49 [2019-11-23 20:35:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:17,834 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:35:17,834 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:35:17,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=781, Invalid=2879, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 20:35:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:35:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 52. [2019-11-23 20:35:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:35:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2019-11-23 20:35:17,846 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 49 [2019-11-23 20:35:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:17,846 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2019-11-23 20:35:17,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:35:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2019-11-23 20:35:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:35:17,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:17,847 INFO L410 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:18,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:18,048 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:18,049 INFO L82 PathProgramCache]: Analyzing trace with hash 741582768, now seen corresponding path program 16 times [2019-11-23 20:35:18,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:18,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484802554] [2019-11-23 20:35:18,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:35:18,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484802554] [2019-11-23 20:35:18,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275024280] [2019-11-23 20:35:18,316 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 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 20:35:18,377 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:18,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:18,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:35:18,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:35:18,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:18,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 31 [2019-11-23 20:35:18,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85801548] [2019-11-23 20:35:18,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:35:18,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:18,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:35:18,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:35:18,504 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 31 states. [2019-11-23 20:35:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:19,008 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2019-11-23 20:35:19,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:35:19,009 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2019-11-23 20:35:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:19,009 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:35:19,010 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:35:19,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=852, Invalid=1800, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:35:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:35:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:35:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:35:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2019-11-23 20:35:19,014 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 51 [2019-11-23 20:35:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:19,015 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2019-11-23 20:35:19,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:35:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2019-11-23 20:35:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:35:19,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:19,015 INFO L410 BasicCegarLoop]: trace histogram [21, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:19,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:19,216 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1720141507, now seen corresponding path program 17 times [2019-11-23 20:35:19,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:19,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560921093] [2019-11-23 20:35:19,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:19,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:35:19,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560921093] [2019-11-23 20:35:19,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605154021] [2019-11-23 20:35:19,444 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 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 20:35:19,923 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:35:19,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:19,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:35:19,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:35:19,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:19,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:35:19,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369488613] [2019-11-23 20:35:19,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:35:19,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:19,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:35:19,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:35:19,962 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 25 states. [2019-11-23 20:35:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:20,004 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2019-11-23 20:35:20,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:35:20,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2019-11-23 20:35:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:20,005 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:35:20,005 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:35:20,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:35:20,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:35:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-23 20:35:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:35:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-11-23 20:35:20,012 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 55 [2019-11-23 20:35:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:20,012 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-11-23 20:35:20,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:35:20,013 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-11-23 20:35:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:35:20,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:20,013 INFO L410 BasicCegarLoop]: trace histogram [22, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:20,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:20,218 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash -930800898, now seen corresponding path program 18 times [2019-11-23 20:35:20,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:20,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317177104] [2019-11-23 20:35:20,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:35:20,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317177104] [2019-11-23 20:35:20,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281489821] [2019-11-23 20:35:20,535 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 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 20:35:21,190 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:35:21,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:21,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:35:21,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:21,199 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:21,199 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:21,206 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:21,206 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:21,206 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:21,307 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2019-11-23 20:35:21,308 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:21,319 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:21,320 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:35:21,321 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:35 [2019-11-23 20:35:21,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:21,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:35:21,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:21,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2019-11-23 20:35:21,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501593526] [2019-11-23 20:35:21,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:35:21,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:35:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:35:21,629 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 36 states. [2019-11-23 20:35:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:22,763 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2019-11-23 20:35:22,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:35:22,764 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 56 [2019-11-23 20:35:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:22,764 INFO L225 Difference]: With dead ends: 111 [2019-11-23 20:35:22,765 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:35:22,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1041, Invalid=3119, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:35:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:35:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-23 20:35:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:35:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-11-23 20:35:22,772 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 56 [2019-11-23 20:35:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:22,773 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-11-23 20:35:22,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:35:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-11-23 20:35:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:35:22,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:22,773 INFO L410 BasicCegarLoop]: trace histogram [23, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:22,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:22,978 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash 403336971, now seen corresponding path program 19 times [2019-11-23 20:35:22,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:22,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706752434] [2019-11-23 20:35:22,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:35:23,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706752434] [2019-11-23 20:35:23,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859856486] [2019-11-23 20:35:23,269 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 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 20:35:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:23,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:35:23,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:35:23,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:23,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:35:23,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158210399] [2019-11-23 20:35:23,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:35:23,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:23,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:35:23,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:23,359 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 27 states. [2019-11-23 20:35:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:23,406 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2019-11-23 20:35:23,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:35:23,406 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2019-11-23 20:35:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:23,407 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:35:23,407 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:35:23,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:35:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:35:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:35:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-11-23 20:35:23,412 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 60 [2019-11-23 20:35:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:23,413 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-11-23 20:35:23,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:35:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-11-23 20:35:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:35:23,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:23,413 INFO L410 BasicCegarLoop]: trace histogram [24, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:23,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:23,617 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1807808592, now seen corresponding path program 20 times [2019-11-23 20:35:23,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:23,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756008241] [2019-11-23 20:35:23,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:35:24,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756008241] [2019-11-23 20:35:24,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405173062] [2019-11-23 20:35:24,040 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 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 20:35:24,107 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:24,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:24,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:35:24,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:35:24,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:24,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:35:24,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100288752] [2019-11-23 20:35:24,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:35:24,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:24,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:35:24,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:35:24,139 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 28 states. [2019-11-23 20:35:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:24,191 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2019-11-23 20:35:24,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:35:24,192 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2019-11-23 20:35:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:24,192 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:35:24,192 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:35:24,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:35:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:35:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-23 20:35:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:35:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2019-11-23 20:35:24,198 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 61 [2019-11-23 20:35:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:24,198 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2019-11-23 20:35:24,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:35:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2019-11-23 20:35:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:35:24,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:24,199 INFO L410 BasicCegarLoop]: trace histogram [25, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:24,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:24,403 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1633844309, now seen corresponding path program 21 times [2019-11-23 20:35:24,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:24,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626115561] [2019-11-23 20:35:24,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:35:24,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626115561] [2019-11-23 20:35:24,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268849572] [2019-11-23 20:35:24,866 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 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 20:35:25,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:35:25,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:25,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:35:25,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:25,060 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:25,060 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:25,065 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:25,065 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:25,066 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:25,144 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:35:25,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:25,152 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:25,153 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:25,153 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:35:25,188 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:35:25,199 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:25,199 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 74 [2019-11-23 20:35:25,200 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:25,224 INFO L567 ElimStorePlain]: treesize reduction 38, result has 54.2 percent of original size [2019-11-23 20:35:25,225 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:35:25,225 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-23 20:35:25,386 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:25,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 20:35:25,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:25,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14] total 40 [2019-11-23 20:35:25,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106527427] [2019-11-23 20:35:25,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:35:25,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:35:25,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:35:25,592 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 40 states. [2019-11-23 20:35:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:27,631 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2019-11-23 20:35:27,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:35:27,631 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 62 [2019-11-23 20:35:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:27,632 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:35:27,632 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:35:27,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1233, Invalid=4467, Unknown=0, NotChecked=0, Total=5700 [2019-11-23 20:35:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:35:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2019-11-23 20:35:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:35:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-11-23 20:35:27,639 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 62 [2019-11-23 20:35:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:27,639 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-11-23 20:35:27,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:35:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-11-23 20:35:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:35:27,640 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:27,640 INFO L410 BasicCegarLoop]: trace histogram [26, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:27,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:27,841 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:27,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1589909818, now seen corresponding path program 22 times [2019-11-23 20:35:27,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:27,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597664194] [2019-11-23 20:35:27,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:35:28,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597664194] [2019-11-23 20:35:28,187 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510181087] [2019-11-23 20:35:28,187 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 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 20:35:28,270 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:28,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:28,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:35:28,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:35:28,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:28,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:35:28,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828178227] [2019-11-23 20:35:28,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:35:28,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:35:28,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:35:28,289 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 30 states. [2019-11-23 20:35:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:28,359 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2019-11-23 20:35:28,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:35:28,361 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2019-11-23 20:35:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:28,362 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:35:28,362 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:35:28,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:35:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:35:28,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-11-23 20:35:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:35:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2019-11-23 20:35:28,368 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 67 [2019-11-23 20:35:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:28,368 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2019-11-23 20:35:28,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:35:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2019-11-23 20:35:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:35:28,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:28,369 INFO L410 BasicCegarLoop]: trace histogram [27, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:28,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:28,572 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:28,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1766734465, now seen corresponding path program 23 times [2019-11-23 20:35:28,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:28,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935750221] [2019-11-23 20:35:28,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:35:29,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935750221] [2019-11-23 20:35:29,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204071357] [2019-11-23 20:35:29,080 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 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 20:35:35,608 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-23 20:35:35,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:35,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:35:35,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:35:35,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:35,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:35:35,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850617891] [2019-11-23 20:35:35,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:35:35,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:35:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:35:35,630 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 31 states. [2019-11-23 20:35:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:35,684 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2019-11-23 20:35:35,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:35:35,687 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2019-11-23 20:35:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:35,688 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:35:35,688 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:35:35,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:35:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:35:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-23 20:35:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:35:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2019-11-23 20:35:35,693 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 68 [2019-11-23 20:35:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:35,693 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2019-11-23 20:35:35,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:35:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2019-11-23 20:35:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:35:35,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:35,694 INFO L410 BasicCegarLoop]: trace histogram [28, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:35,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:35,902 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:35,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1551475162, now seen corresponding path program 24 times [2019-11-23 20:35:35,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:35,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928103633] [2019-11-23 20:35:35,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:35:36,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928103633] [2019-11-23 20:35:36,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83338105] [2019-11-23 20:35:36,295 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 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 20:35:38,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:35:38,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:38,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:35:38,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:38,163 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:38,164 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:38,166 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:38,167 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:38,167 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-23 20:35:38,272 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2019-11-23 20:35:38,272 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:38,280 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:38,281 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:35:38,281 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2019-11-23 20:35:38,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:38,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 25 proven. 52 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 20:35:38,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:38,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2019-11-23 20:35:38,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856970999] [2019-11-23 20:35:38,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:35:38,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:38,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:35:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:35:38,662 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 44 states. [2019-11-23 20:35:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:40,629 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2019-11-23 20:35:40,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:35:40,629 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 69 [2019-11-23 20:35:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:40,630 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:35:40,631 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:35:40,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1673, Invalid=5467, Unknown=0, NotChecked=0, Total=7140 [2019-11-23 20:35:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:35:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-23 20:35:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:35:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-11-23 20:35:40,640 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 69 [2019-11-23 20:35:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:40,640 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-11-23 20:35:40,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:35:40,640 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-11-23 20:35:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:35:40,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:40,641 INFO L410 BasicCegarLoop]: trace histogram [29, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:40,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:40,846 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:40,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2124037767, now seen corresponding path program 25 times [2019-11-23 20:35:40,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:40,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537993756] [2019-11-23 20:35:40,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:35:41,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537993756] [2019-11-23 20:35:41,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073667780] [2019-11-23 20:35:41,282 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 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 20:35:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:41,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:35:41,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:35:41,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:41,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:35:41,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306660170] [2019-11-23 20:35:41,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:35:41,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:35:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:35:41,367 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 33 states. [2019-11-23 20:35:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:41,431 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2019-11-23 20:35:41,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:35:41,431 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2019-11-23 20:35:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:41,432 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:35:41,432 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:35:41,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:35:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:35:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-11-23 20:35:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:35:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2019-11-23 20:35:41,438 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 73 [2019-11-23 20:35:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:41,438 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2019-11-23 20:35:41,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:35:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2019-11-23 20:35:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:35:41,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:41,439 INFO L410 BasicCegarLoop]: trace histogram [30, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:41,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:41,642 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1118102284, now seen corresponding path program 26 times [2019-11-23 20:35:41,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:41,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398592038] [2019-11-23 20:35:41,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:35:42,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398592038] [2019-11-23 20:35:42,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263470011] [2019-11-23 20:35:42,104 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 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 20:35:42,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:42,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:42,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:35:42,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:35:42,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:42,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 20:35:42,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991218927] [2019-11-23 20:35:42,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:35:42,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:42,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:35:42,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:35:42,192 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 34 states. [2019-11-23 20:35:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:42,268 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2019-11-23 20:35:42,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:35:42,269 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2019-11-23 20:35:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:42,269 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:35:42,269 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:35:42,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:35:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:35:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-23 20:35:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:35:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2019-11-23 20:35:42,275 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 74 [2019-11-23 20:35:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:42,276 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2019-11-23 20:35:42,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:35:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2019-11-23 20:35:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:35:42,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:42,277 INFO L410 BasicCegarLoop]: trace histogram [31, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:42,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:42,480 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1126617, now seen corresponding path program 27 times [2019-11-23 20:35:42,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:42,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164567636] [2019-11-23 20:35:42,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:35:42,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164567636] [2019-11-23 20:35:42,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20480909] [2019-11-23 20:35:42,945 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 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 20:35:43,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:35:43,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:43,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:35:43,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:43,389 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:35:43,389 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:43,396 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:43,396 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:43,397 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:35:43,537 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:35:43,538 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:43,547 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:43,548 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:35:43,548 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-11-23 20:35:43,620 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:35:43,639 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:35:43,640 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 74 [2019-11-23 20:35:43,641 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:35:43,673 INFO L567 ElimStorePlain]: treesize reduction 38, result has 54.2 percent of original size [2019-11-23 20:35:43,674 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:35:43,674 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2019-11-23 20:35:43,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:44,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:35:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-23 20:35:44,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:44,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 16] total 48 [2019-11-23 20:35:44,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081737908] [2019-11-23 20:35:44,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:35:44,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:44,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:35:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:35:44,223 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 48 states. [2019-11-23 20:35:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:47,062 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2019-11-23 20:35:47,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:35:47,062 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 75 [2019-11-23 20:35:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:47,064 INFO L225 Difference]: With dead ends: 126 [2019-11-23 20:35:47,064 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:35:47,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1793, Invalid=6397, Unknown=0, NotChecked=0, Total=8190 [2019-11-23 20:35:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:35:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2019-11-23 20:35:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:35:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2019-11-23 20:35:47,073 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 75 [2019-11-23 20:35:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:47,073 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2019-11-23 20:35:47,073 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:35:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2019-11-23 20:35:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:35:47,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:47,073 INFO L410 BasicCegarLoop]: trace histogram [32, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:47,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:47,274 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:47,275 INFO L82 PathProgramCache]: Analyzing trace with hash 985012042, now seen corresponding path program 28 times [2019-11-23 20:35:47,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:47,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577476698] [2019-11-23 20:35:47,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:35:47,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577476698] [2019-11-23 20:35:47,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926719436] [2019-11-23 20:35:47,764 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 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 20:35:47,861 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:47,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:47,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:35:47,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:35:47,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:47,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:35:47,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651596430] [2019-11-23 20:35:47,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:35:47,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:35:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:35:47,893 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 36 states. [2019-11-23 20:35:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:47,931 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2019-11-23 20:35:47,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:35:47,931 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2019-11-23 20:35:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:47,932 INFO L225 Difference]: With dead ends: 128 [2019-11-23 20:35:47,932 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:35:47,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:35:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:35:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-11-23 20:35:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:35:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2019-11-23 20:35:47,940 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 80 [2019-11-23 20:35:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:47,941 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2019-11-23 20:35:47,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:35:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2019-11-23 20:35:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:35:47,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:47,942 INFO L410 BasicCegarLoop]: trace histogram [33, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:48,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:48,145 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:48,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2059080849, now seen corresponding path program 29 times [2019-11-23 20:35:48,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:48,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568436765] [2019-11-23 20:35:48,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:35:48,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568436765] [2019-11-23 20:35:48,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695022986] [2019-11-23 20:35:48,918 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 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 20:36:02,886 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:36:02,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:02,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:36:02,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:36:02,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:02,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:36:02,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896345128] [2019-11-23 20:36:02,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:36:02,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:02,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:36:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:36:02,919 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 37 states. [2019-11-23 20:36:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:02,979 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2019-11-23 20:36:02,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:36:02,979 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 81 [2019-11-23 20:36:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:02,980 INFO L225 Difference]: With dead ends: 129 [2019-11-23 20:36:02,980 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:36:02,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:36:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:36:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-23 20:36:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:36:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-11-23 20:36:02,986 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 81 [2019-11-23 20:36:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:02,986 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-11-23 20:36:02,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:36:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-11-23 20:36:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 20:36:02,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:02,986 INFO L410 BasicCegarLoop]: trace histogram [34, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:03,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:03,187 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:03,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1936679958, now seen corresponding path program 30 times [2019-11-23 20:36:03,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:03,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112875121] [2019-11-23 20:36:03,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:36:03,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112875121] [2019-11-23 20:36:03,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091859791] [2019-11-23 20:36:03,847 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 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 20:36:09,415 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:36:09,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:09,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:36:09,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:09,427 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:36:09,427 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:09,431 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:09,432 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:09,432 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-23 20:36:09,565 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2019-11-23 20:36:09,565 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:09,584 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:09,584 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:36:09,585 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:32 [2019-11-23 20:36:09,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:10,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 41 proven. 72 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-11-23 20:36:10,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:10,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 17] total 52 [2019-11-23 20:36:10,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472669036] [2019-11-23 20:36:10,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:36:10,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:36:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=1918, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:36:10,054 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 52 states. [2019-11-23 20:36:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:12,618 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2019-11-23 20:36:12,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:36:12,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 82 [2019-11-23 20:36:12,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:12,619 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:36:12,620 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:36:12,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2395, Invalid=7907, Unknown=0, NotChecked=0, Total=10302 [2019-11-23 20:36:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:36:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-11-23 20:36:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:36:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2019-11-23 20:36:12,627 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 82 [2019-11-23 20:36:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:12,627 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2019-11-23 20:36:12,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:36:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2019-11-23 20:36:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:36:12,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:12,628 INFO L410 BasicCegarLoop]: trace histogram [35, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:12,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:12,835 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1657309897, now seen corresponding path program 31 times [2019-11-23 20:36:12,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:12,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635830338] [2019-11-23 20:36:12,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-23 20:36:13,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635830338] [2019-11-23 20:36:13,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410419069] [2019-11-23 20:36:13,414 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 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 20:36:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:13,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:36:13,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-23 20:36:13,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:13,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:36:13,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505891770] [2019-11-23 20:36:13,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:36:13,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:13,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:36:13,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:36:13,518 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 39 states. [2019-11-23 20:36:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:13,568 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2019-11-23 20:36:13,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:36:13,568 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2019-11-23 20:36:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:13,569 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:36:13,569 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:36:13,569 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:36:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:36:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-23 20:36:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:36:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2019-11-23 20:36:13,575 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 86 [2019-11-23 20:36:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:13,575 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2019-11-23 20:36:13,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:36:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2019-11-23 20:36:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:36:13,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:13,576 INFO L410 BasicCegarLoop]: trace histogram [36, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:13,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:13,779 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:13,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1818371684, now seen corresponding path program 32 times [2019-11-23 20:36:13,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:13,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74721758] [2019-11-23 20:36:13,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-23 20:36:14,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74721758] [2019-11-23 20:36:14,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548090471] [2019-11-23 20:36:14,401 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 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 20:36:14,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:14,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:14,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:36:14,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-23 20:36:14,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:14,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:36:14,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101630665] [2019-11-23 20:36:14,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:36:14,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:14,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:36:14,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:14,500 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 40 states. [2019-11-23 20:36:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:14,551 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2019-11-23 20:36:14,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:36:14,552 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 87 [2019-11-23 20:36:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:14,552 INFO L225 Difference]: With dead ends: 138 [2019-11-23 20:36:14,552 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:36:14,553 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:36:14,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-11-23 20:36:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:36:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2019-11-23 20:36:14,558 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 87 [2019-11-23 20:36:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:14,558 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2019-11-23 20:36:14,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:36:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2019-11-23 20:36:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 20:36:14,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:14,559 INFO L410 BasicCegarLoop]: trace histogram [37, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:14,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:14,763 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:14,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1778647511, now seen corresponding path program 33 times [2019-11-23 20:36:14,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:14,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665288334] [2019-11-23 20:36:14,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-23 20:36:15,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665288334] [2019-11-23 20:36:15,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453100263] [2019-11-23 20:36:15,568 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:36:16,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:36:16,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:16,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-23 20:36:16,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:16,218 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:36:16,219 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:16,225 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:16,225 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:16,226 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:36:16,488 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-23 20:36:16,488 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:16,505 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:16,506 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:36:16,506 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2019-11-23 20:36:16,582 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:36:16,584 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:36:16,586 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2019-11-23 20:36:16,586 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:36:16,606 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:36:16,607 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:36:16,607 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:48 [2019-11-23 20:36:16,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:17,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:36:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-23 20:36:17,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:17,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 18] total 56 [2019-11-23 20:36:17,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844574994] [2019-11-23 20:36:17,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:36:17,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:17,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:36:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:36:17,379 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 56 states. [2019-11-23 20:36:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:21,010 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2019-11-23 20:36:21,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-23 20:36:21,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 88 [2019-11-23 20:36:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:21,011 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:36:21,012 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:36:21,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2461, Invalid=8669, Unknown=0, NotChecked=0, Total=11130 [2019-11-23 20:36:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:36:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-11-23 20:36:21,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:36:21,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2019-11-23 20:36:21,020 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 88 [2019-11-23 20:36:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:21,020 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2019-11-23 20:36:21,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:36:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2019-11-23 20:36:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:36:21,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:21,021 INFO L410 BasicCegarLoop]: trace histogram [38, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:21,225 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:21,226 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -893818190, now seen corresponding path program 34 times [2019-11-23 20:36:21,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:21,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249514660] [2019-11-23 20:36:21,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:36:21,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249514660] [2019-11-23 20:36:21,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370680144] [2019-11-23 20:36:21,867 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 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 20:36:21,972 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:21,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:21,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:36:21,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:36:21,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:21,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:36:21,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805468701] [2019-11-23 20:36:21,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:36:21,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:36:21,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:36:21,993 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 42 states. [2019-11-23 20:36:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:22,066 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2019-11-23 20:36:22,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:36:22,067 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2019-11-23 20:36:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:22,068 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:36:22,068 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:36:22,068 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:36:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:36:22,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-11-23 20:36:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 20:36:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2019-11-23 20:36:22,075 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 93 [2019-11-23 20:36:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:22,076 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2019-11-23 20:36:22,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:36:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2019-11-23 20:36:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 20:36:22,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:22,077 INFO L410 BasicCegarLoop]: trace histogram [39, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:22,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:22,280 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:22,282 INFO L82 PathProgramCache]: Analyzing trace with hash -420398419, now seen corresponding path program 35 times [2019-11-23 20:36:22,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:22,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015075569] [2019-11-23 20:36:22,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:36:23,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015075569] [2019-11-23 20:36:23,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818533350] [2019-11-23 20:36:23,347 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 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