/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-programs/copysome2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:44:36,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:44:36,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:44:36,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:44:36,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:44:36,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:44:36,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:44:36,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:44:36,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:44:36,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:44:36,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:44:36,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:44:36,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:44:36,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:44:36,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:44:36,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:44:36,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:44:36,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:44:36,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:44:36,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:44:36,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:44:36,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:44:36,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:44:36,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:44:36,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:44:36,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:44:36,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:44:36,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:44:36,328 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 20:44:36,342 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:44:36,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:44:36,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:44:36,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:44:36,343 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:44:36,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:44:36,344 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:44:36,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:44:36,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:44:36,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:44:36,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:44:36,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:44:36,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:44:36,345 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:44:36,345 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:44:36,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:44:36,346 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:44:36,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:44:36,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:44:36,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:44:36,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:44:36,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:44:36,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:44:36,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:44:36,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:44:36,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:44:36,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:44:36,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:44:36,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:44:36,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:44:36,627 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:44:36,639 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:44:36,644 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:44:36,646 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:44:36,646 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:44:36,647 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-2.i [2019-11-23 20:44:36,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2c680ef/90fde944696e4c68a96e3c3d6139f5b7/FLAGf2c0520b8 [2019-11-23 20:44:37,211 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:44:37,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome2-2.i [2019-11-23 20:44:37,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2c680ef/90fde944696e4c68a96e3c3d6139f5b7/FLAGf2c0520b8 [2019-11-23 20:44:37,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b2c680ef/90fde944696e4c68a96e3c3d6139f5b7 [2019-11-23 20:44:37,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:44:37,593 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:44:37,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:37,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:44:37,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:44:37,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:37,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559894c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37, skipping insertion in model container [2019-11-23 20:44:37,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:37,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:44:37,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:44:37,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:37,836 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:44:37,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:37,883 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:44:37,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37 WrapperNode [2019-11-23 20:44:37,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:37,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:37,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:44:37,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:44:37,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:37,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:38,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:38,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:44:38,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:44:38,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:44:38,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:38,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:38,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:38,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:38,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:38,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:38,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (1/1) ... [2019-11-23 20:44:38,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:44:38,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:44:38,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:44:38,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:44:38,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (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 20:44:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:44:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:44:38,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:44:38,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:44:38,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:44:38,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:44:38,434 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:44:38,434 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:44:38,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:38 BoogieIcfgContainer [2019-11-23 20:44:38,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:44:38,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:44:38,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:44:38,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:44:38,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:44:37" (1/3) ... [2019-11-23 20:44:38,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b45189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:38, skipping insertion in model container [2019-11-23 20:44:38,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:37" (2/3) ... [2019-11-23 20:44:38,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b45189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:38, skipping insertion in model container [2019-11-23 20:44:38,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:38" (3/3) ... [2019-11-23 20:44:38,453 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2019-11-23 20:44:38,463 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:44:38,472 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:44:38,484 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:44:38,506 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:44:38,506 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:44:38,506 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:44:38,506 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:44:38,506 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:44:38,507 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:44:38,507 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:44:38,507 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:44:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-23 20:44:38,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:44:38,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:38,527 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:38,527 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash 551047633, now seen corresponding path program 1 times [2019-11-23 20:44:38,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:38,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853890263] [2019-11-23 20:44:38,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:38,669 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 20:44:38,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853890263] [2019-11-23 20:44:38,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:38,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:44:38,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991515015] [2019-11-23 20:44:38,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:44:38,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:44:38,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:44:38,694 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-11-23 20:44:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:38,710 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2019-11-23 20:44:38,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:44:38,711 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:44:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:38,721 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:44:38,722 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:44:38,725 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 20:44:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:44:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 20:44:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:44:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-23 20:44:38,762 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2019-11-23 20:44:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:38,763 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-23 20:44:38,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:44:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-23 20:44:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:44:38,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:38,765 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:38,765 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:38,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:38,766 INFO L82 PathProgramCache]: Analyzing trace with hash -631716997, now seen corresponding path program 1 times [2019-11-23 20:44:38,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:38,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496293881] [2019-11-23 20:44:38,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:38,818 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 20:44:38,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496293881] [2019-11-23 20:44:38,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:38,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:44:38,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763125010] [2019-11-23 20:44:38,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:44:38,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:44:38,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:44:38,823 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2019-11-23 20:44:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:38,917 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2019-11-23 20:44:38,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:44:38,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:44:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:38,919 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:44:38,919 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:44:38,921 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 20:44:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:44:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-23 20:44:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:44:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-23 20:44:38,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2019-11-23 20:44:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:38,928 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-23 20:44:38,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:44:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-23 20:44:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:44:38,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:38,929 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:38,929 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1141073570, now seen corresponding path program 1 times [2019-11-23 20:44:38,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:38,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545264302] [2019-11-23 20:44:38,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:44:39,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545264302] [2019-11-23 20:44:39,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010475742] [2019-11-23 20:44:39,048 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 20:44:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:39,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:39,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:44:39,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:39,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:44:39,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199505153] [2019-11-23 20:44:39,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:44:39,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:44:39,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:44:39,164 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 7 states. [2019-11-23 20:44:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:39,393 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2019-11-23 20:44:39,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:44:39,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-23 20:44:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:39,398 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:44:39,398 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:44:39,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:44:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:44:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2019-11-23 20:44:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:44:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-11-23 20:44:39,425 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 19 [2019-11-23 20:44:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:39,426 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-11-23 20:44:39,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:44:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-11-23 20:44:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:44:39,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:39,430 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:39,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:39,640 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1508541617, now seen corresponding path program 1 times [2019-11-23 20:44:39,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:39,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178550293] [2019-11-23 20:44:39,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:44:39,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178550293] [2019-11-23 20:44:39,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126993209] [2019-11-23 20:44:39,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:40,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:44:40,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-23 20:44:40,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:40,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-11-23 20:44:40,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173117859] [2019-11-23 20:44:40,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:44:40,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:40,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:44:40,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:44:40,140 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 15 states. [2019-11-23 20:44:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:41,029 INFO L93 Difference]: Finished difference Result 198 states and 271 transitions. [2019-11-23 20:44:41,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:44:41,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2019-11-23 20:44:41,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:41,033 INFO L225 Difference]: With dead ends: 198 [2019-11-23 20:44:41,033 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:44:41,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:44:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:44:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2019-11-23 20:44:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:44:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 177 transitions. [2019-11-23 20:44:41,081 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 177 transitions. Word has length 43 [2019-11-23 20:44:41,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:41,082 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 177 transitions. [2019-11-23 20:44:41,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:44:41,082 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 177 transitions. [2019-11-23 20:44:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:44:41,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:41,091 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:41,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:41,296 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138155, now seen corresponding path program 2 times [2019-11-23 20:44:41,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:41,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566524475] [2019-11-23 20:44:41,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:44:41,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566524475] [2019-11-23 20:44:41,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999567015] [2019-11-23 20:44:41,654 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:41,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:44:41,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:41,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:44:41,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2019-11-23 20:44:41,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:44:41,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2019-11-23 20:44:41,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980138473] [2019-11-23 20:44:41,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:44:41,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:41,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:44:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:44:41,941 INFO L87 Difference]: Start difference. First operand 136 states and 177 transitions. Second operand 26 states. [2019-11-23 20:44:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:43,667 INFO L93 Difference]: Finished difference Result 470 states and 642 transitions. [2019-11-23 20:44:43,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:44:43,668 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2019-11-23 20:44:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:43,671 INFO L225 Difference]: With dead ends: 470 [2019-11-23 20:44:43,671 INFO L226 Difference]: Without dead ends: 353 [2019-11-23 20:44:43,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1143, Invalid=3017, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:44:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-11-23 20:44:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2019-11-23 20:44:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-11-23 20:44:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 325 transitions. [2019-11-23 20:44:43,708 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 325 transitions. Word has length 75 [2019-11-23 20:44:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:43,709 INFO L462 AbstractCegarLoop]: Abstraction has 248 states and 325 transitions. [2019-11-23 20:44:43,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:44:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 325 transitions. [2019-11-23 20:44:43,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:44:43,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:43,713 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:43,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:43,917 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1528764808, now seen corresponding path program 3 times [2019-11-23 20:44:43,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:43,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792522342] [2019-11-23 20:44:43,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-11-23 20:44:44,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792522342] [2019-11-23 20:44:44,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953502946] [2019-11-23 20:44:44,454 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:44,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:44:44,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:44,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:44,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2019-11-23 20:44:44,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:44,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2019-11-23 20:44:44,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035753480] [2019-11-23 20:44:44,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:44:44,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:44:44,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:44:44,608 INFO L87 Difference]: Start difference. First operand 248 states and 325 transitions. Second operand 4 states. [2019-11-23 20:44:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:44,675 INFO L93 Difference]: Finished difference Result 393 states and 519 transitions. [2019-11-23 20:44:44,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:44:44,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-11-23 20:44:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:44,678 INFO L225 Difference]: With dead ends: 393 [2019-11-23 20:44:44,678 INFO L226 Difference]: Without dead ends: 242 [2019-11-23 20:44:44,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:44:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-11-23 20:44:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2019-11-23 20:44:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-11-23 20:44:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 315 transitions. [2019-11-23 20:44:44,697 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 315 transitions. Word has length 115 [2019-11-23 20:44:44,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:44,698 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 315 transitions. [2019-11-23 20:44:44,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:44:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 315 transitions. [2019-11-23 20:44:44,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:44:44,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:44,700 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:44,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:44,908 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:44,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1868809210, now seen corresponding path program 4 times [2019-11-23 20:44:44,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:44,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259629833] [2019-11-23 20:44:44,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-11-23 20:44:45,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259629833] [2019-11-23 20:44:45,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576354889] [2019-11-23 20:44:45,262 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:45,335 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:44:45,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:45,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:45,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2019-11-23 20:44:45,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:45,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [24] total 26 [2019-11-23 20:44:45,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908587558] [2019-11-23 20:44:45,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:44:45,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:45,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:44:45,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:44:45,395 INFO L87 Difference]: Start difference. First operand 242 states and 315 transitions. Second operand 4 states. [2019-11-23 20:44:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:45,470 INFO L93 Difference]: Finished difference Result 391 states and 503 transitions. [2019-11-23 20:44:45,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:44:45,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2019-11-23 20:44:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:45,472 INFO L225 Difference]: With dead ends: 391 [2019-11-23 20:44:45,472 INFO L226 Difference]: Without dead ends: 228 [2019-11-23 20:44:45,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:44:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-11-23 20:44:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 188. [2019-11-23 20:44:45,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:44:45,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2019-11-23 20:44:45,486 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 115 [2019-11-23 20:44:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:45,487 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2019-11-23 20:44:45,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:44:45,487 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2019-11-23 20:44:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:44:45,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:45,489 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:45,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:45,692 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:45,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1874124550, now seen corresponding path program 5 times [2019-11-23 20:44:45,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:45,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695909835] [2019-11-23 20:44:45,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-11-23 20:44:45,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695909835] [2019-11-23 20:44:45,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494022230] [2019-11-23 20:44:45,954 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true