/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-lopstr16/base_case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:46:31,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:46:31,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:46:31,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 22:46:31,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:46:31,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:46:31,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:46:31,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:46:31,491 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:46:31,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:46:31,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:46:31,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:46:31,494 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:46:31,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:46:31,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:46:31,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:46:31,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:46:31,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:46:31,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:46:31,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:46:31,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:46:31,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:46:31,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:46:31,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:46:31,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:46:31,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:46:31,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:46:31,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:46:31,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:46:31,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:46:31,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:46:31,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:46:31,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:46:31,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:46:31,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:46:31,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:46:31,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:46:31,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:46:31,956 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:46:31,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/base_case.i [2020-12-21 22:46:32,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09177cf3e/afd0f33606454e6bb015a89446dc14c7/FLAGd79e6f759 [2020-12-21 22:46:32,689 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:46:32,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/base_case.i [2020-12-21 22:46:32,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09177cf3e/afd0f33606454e6bb015a89446dc14c7/FLAGd79e6f759 [2020-12-21 22:46:33,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09177cf3e/afd0f33606454e6bb015a89446dc14c7 [2020-12-21 22:46:33,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:46:33,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:46:33,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:46:33,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:46:33,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:46:33,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45001583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33, skipping insertion in model container [2020-12-21 22:46:33,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:46:33,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:46:33,254 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2020-12-21 22:46:33,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:46:33,287 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:46:33,298 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2020-12-21 22:46:33,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:46:33,324 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:46:33,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33 WrapperNode [2020-12-21 22:46:33,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:46:33,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:46:33,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:46:33,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:46:33,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,366 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:46:33,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:46:33,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:46:33,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:46:33,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (1/1) ... [2020-12-21 22:46:33,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:46:33,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:46:33,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:46:33,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:46:33,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (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 [2020-12-21 22:46:33,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-21 22:46:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:46:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-21 22:46:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:46:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:46:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-21 22:46:33,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:46:33,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:46:33,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:46:34,025 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:46:34,025 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:46:34,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:46:34 BoogieIcfgContainer [2020-12-21 22:46:34,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:46:34,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:46:34,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:46:34,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:46:34,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:46:33" (1/3) ... [2020-12-21 22:46:34,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6edc3b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:46:34, skipping insertion in model container [2020-12-21 22:46:34,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:46:33" (2/3) ... [2020-12-21 22:46:34,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6edc3b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:46:34, skipping insertion in model container [2020-12-21 22:46:34,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:46:34" (3/3) ... [2020-12-21 22:46:34,087 INFO L111 eAbstractionObserver]: Analyzing ICFG base_case.i [2020-12-21 22:46:34,121 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:46:34,132 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:46:34,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:46:34,204 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:46:34,205 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:46:34,205 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:46:34,205 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:46:34,205 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:46:34,205 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:46:34,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:46:34,206 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:46:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-21 22:46:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 22:46:34,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:34,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:34,235 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:34,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:34,241 INFO L82 PathProgramCache]: Analyzing trace with hash 590963434, now seen corresponding path program 1 times [2020-12-21 22:46:34,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:34,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139081598] [2020-12-21 22:46:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:34,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139081598] [2020-12-21 22:46:34,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:46:34,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:46:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942391228] [2020-12-21 22:46:34,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:46:34,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:34,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:46:34,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:46:34,431 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-21 22:46:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:34,449 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-12-21 22:46:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:46:34,450 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-21 22:46:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:34,459 INFO L225 Difference]: With dead ends: 30 [2020-12-21 22:46:34,460 INFO L226 Difference]: Without dead ends: 14 [2020-12-21 22:46:34,463 INFO L677 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 [2020-12-21 22:46:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-21 22:46:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-21 22:46:34,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 22:46:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-21 22:46:34,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2020-12-21 22:46:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:34,497 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-21 22:46:34,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:46:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-21 22:46:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 22:46:34,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:34,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:34,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:46:34,499 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash 218784471, now seen corresponding path program 1 times [2020-12-21 22:46:34,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:34,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874432019] [2020-12-21 22:46:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:34,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874432019] [2020-12-21 22:46:34,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:46:34,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:46:34,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890566405] [2020-12-21 22:46:34,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:46:34,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:46:34,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:46:34,585 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-12-21 22:46:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:34,623 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-21 22:46:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:46:34,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 22:46:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:34,625 INFO L225 Difference]: With dead ends: 33 [2020-12-21 22:46:34,625 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 22:46:34,626 INFO L677 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 [2020-12-21 22:46:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 22:46:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2020-12-21 22:46:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 22:46:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 22:46:34,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2020-12-21 22:46:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:34,632 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 22:46:34,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:46:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 22:46:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:46:34,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:34,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:34,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:46:34,633 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:34,634 INFO L82 PathProgramCache]: Analyzing trace with hash 212359228, now seen corresponding path program 1 times [2020-12-21 22:46:34,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:34,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389041129] [2020-12-21 22:46:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:34,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389041129] [2020-12-21 22:46:34,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477749418] [2020-12-21 22:46:34,730 INFO L95 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 [2020-12-21 22:46:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:46:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:34,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:34,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 22:46:34,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895218220] [2020-12-21 22:46:34,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:46:34,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:34,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:46:34,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:46:34,961 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states. [2020-12-21 22:46:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:35,038 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-12-21 22:46:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:46:35,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-21 22:46:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:35,047 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:46:35,047 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 22:46:35,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:46:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 22:46:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 19. [2020-12-21 22:46:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:46:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 22:46:35,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-21 22:46:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:35,061 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 22:46:35,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:46:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 22:46:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:46:35,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:35,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:35,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 22:46:35,278 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2010321697, now seen corresponding path program 2 times [2020-12-21 22:46:35,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:35,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226360200] [2020-12-21 22:46:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:35,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226360200] [2020-12-21 22:46:35,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095087972] [2020-12-21 22:46:35,468 INFO L93 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 [2020-12-21 22:46:35,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:46:35,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:35,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:46:35,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:35,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:35,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 22:46:35,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323718094] [2020-12-21 22:46:35,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:46:35,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:35,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:46:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:46:35,583 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-12-21 22:46:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:35,632 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-12-21 22:46:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:46:35,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-21 22:46:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:35,634 INFO L225 Difference]: With dead ends: 55 [2020-12-21 22:46:35,634 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 22:46:35,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:46:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 22:46:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 23. [2020-12-21 22:46:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:46:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-21 22:46:35,641 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2020-12-21 22:46:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:35,641 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-21 22:46:35,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:46:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-21 22:46:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:46:35,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:35,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:35,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:35,856 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:35,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2018782330, now seen corresponding path program 3 times [2020-12-21 22:46:35,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:35,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094027892] [2020-12-21 22:46:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:35,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094027892] [2020-12-21 22:46:35,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251549344] [2020-12-21 22:46:35,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 22:46:36,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:46:36,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:36,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:46:36,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:36,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:36,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 22:46:36,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860795800] [2020-12-21 22:46:36,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:46:36,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:46:36,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:46:36,165 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2020-12-21 22:46:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:36,228 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-12-21 22:46:36,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:46:36,228 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-21 22:46:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:36,230 INFO L225 Difference]: With dead ends: 66 [2020-12-21 22:46:36,230 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 22:46:36,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:46:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 22:46:36,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 27. [2020-12-21 22:46:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:46:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-21 22:46:36,236 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2020-12-21 22:46:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:36,237 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-21 22:46:36,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:46:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-21 22:46:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 22:46:36,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:36,238 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:36,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:36,454 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:36,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:36,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2102142613, now seen corresponding path program 4 times [2020-12-21 22:46:36,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:36,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106365580] [2020-12-21 22:46:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:36,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106365580] [2020-12-21 22:46:36,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612577169] [2020-12-21 22:46:36,558 INFO L93 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 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 [2020-12-21 22:46:37,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:46:37,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:46:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:37,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:37,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 22:46:37,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257340896] [2020-12-21 22:46:37,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:46:37,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:37,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:46:37,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:46:37,708 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 8 states. [2020-12-21 22:46:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:37,787 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-12-21 22:46:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:46:37,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-21 22:46:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:37,788 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:46:37,788 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 22:46:37,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:46:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 22:46:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 31. [2020-12-21 22:46:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:46:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-21 22:46:37,794 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24 [2020-12-21 22:46:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:37,795 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-21 22:46:37,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:46:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-21 22:46:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 22:46:37,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:37,796 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:38,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:38,011 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:38,012 INFO L82 PathProgramCache]: Analyzing trace with hash 214721744, now seen corresponding path program 5 times [2020-12-21 22:46:38,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:38,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011330617] [2020-12-21 22:46:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011330617] [2020-12-21 22:46:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972893320] [2020-12-21 22:46:38,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:38,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:46:38,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:38,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:46:38,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:39,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:39,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 22:46:39,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577700509] [2020-12-21 22:46:39,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:46:39,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:46:39,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:46:39,024 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 9 states. [2020-12-21 22:46:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:39,103 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-12-21 22:46:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:46:39,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-21 22:46:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:39,105 INFO L225 Difference]: With dead ends: 88 [2020-12-21 22:46:39,105 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 22:46:39,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:46:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 22:46:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 35. [2020-12-21 22:46:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 22:46:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-12-21 22:46:39,111 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 28 [2020-12-21 22:46:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:39,111 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-12-21 22:46:39,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:46:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-12-21 22:46:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 22:46:39,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:39,112 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:39,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 22:46:39,320 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2000074165, now seen corresponding path program 6 times [2020-12-21 22:46:39,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:39,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099321963] [2020-12-21 22:46:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:39,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099321963] [2020-12-21 22:46:39,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721242793] [2020-12-21 22:46:39,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-21 22:46:43,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 22:46:43,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:43,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:46:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:43,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:43,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 22:46:43,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970151715] [2020-12-21 22:46:43,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:46:43,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:43,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:46:43,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:46:43,514 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 10 states. [2020-12-21 22:46:43,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:43,605 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2020-12-21 22:46:43,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:46:43,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-21 22:46:43,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:43,606 INFO L225 Difference]: With dead ends: 99 [2020-12-21 22:46:43,606 INFO L226 Difference]: Without dead ends: 91 [2020-12-21 22:46:43,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:46:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-21 22:46:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 39. [2020-12-21 22:46:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:46:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-21 22:46:43,613 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 32 [2020-12-21 22:46:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:43,613 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-21 22:46:43,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:46:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-21 22:46:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:46:43,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:43,615 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:43,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:43,830 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:43,832 INFO L82 PathProgramCache]: Analyzing trace with hash 278137882, now seen corresponding path program 7 times [2020-12-21 22:46:43,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:43,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062529531] [2020-12-21 22:46:43,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:43,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062529531] [2020-12-21 22:46:43,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895611744] [2020-12-21 22:46:43,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-21 22:46:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:44,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:46:44,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:44,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:44,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 22:46:44,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842296610] [2020-12-21 22:46:44,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:46:44,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:44,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:46:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:46:44,104 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 11 states. [2020-12-21 22:46:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:44,184 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2020-12-21 22:46:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:46:44,184 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-12-21 22:46:44,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:44,185 INFO L225 Difference]: With dead ends: 110 [2020-12-21 22:46:44,185 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 22:46:44,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:46:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 22:46:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 43. [2020-12-21 22:46:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 22:46:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-21 22:46:44,200 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 36 [2020-12-21 22:46:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:44,202 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-21 22:46:44,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:46:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-21 22:46:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 22:46:44,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:44,206 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:44,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:44,421 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:44,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1961207807, now seen corresponding path program 8 times [2020-12-21 22:46:44,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:44,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525122108] [2020-12-21 22:46:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:44,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525122108] [2020-12-21 22:46:44,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641311148] [2020-12-21 22:46:44,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:46:44,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:46:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:44,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:46:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:44,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:44,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 22:46:44,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086443763] [2020-12-21 22:46:44,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:46:44,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:44,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:46:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:46:44,736 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 12 states. [2020-12-21 22:46:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:44,828 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2020-12-21 22:46:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:46:44,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-21 22:46:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:44,830 INFO L225 Difference]: With dead ends: 121 [2020-12-21 22:46:44,830 INFO L226 Difference]: Without dead ends: 113 [2020-12-21 22:46:44,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:46:44,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-21 22:46:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2020-12-21 22:46:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 22:46:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-12-21 22:46:44,835 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 40 [2020-12-21 22:46:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:44,835 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-12-21 22:46:44,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:46:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-12-21 22:46:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 22:46:44,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:44,837 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:45,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:46:45,052 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:45,053 INFO L82 PathProgramCache]: Analyzing trace with hash -577975964, now seen corresponding path program 9 times [2020-12-21 22:46:45,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:45,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185750659] [2020-12-21 22:46:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:45,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185750659] [2020-12-21 22:46:45,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054224652] [2020-12-21 22:46:45,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 22:50:37,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 22:50:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:50:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:50:37,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:50:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:50:37,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:50:37,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 22:50:37,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165974297] [2020-12-21 22:50:37,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:50:37,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:50:37,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:50:37,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:50:37,644 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 13 states. [2020-12-21 22:50:37,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:50:37,739 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2020-12-21 22:50:37,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:50:37,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-12-21 22:50:37,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:50:37,741 INFO L225 Difference]: With dead ends: 132 [2020-12-21 22:50:37,741 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 22:50:37,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:50:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 22:50:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 51. [2020-12-21 22:50:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 22:50:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-21 22:50:37,746 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 44 [2020-12-21 22:50:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:50:37,747 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-21 22:50:37,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:50:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-21 22:50:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 22:50:37,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:50:37,748 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:50:37,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:50:37,962 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:50:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:50:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1900720201, now seen corresponding path program 10 times [2020-12-21 22:50:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:50:37,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804191789] [2020-12-21 22:50:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:50:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:50:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:50:38,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804191789] [2020-12-21 22:50:38,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169416169] [2020-12-21 22:50:38,110 INFO L93 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 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 [2020-12-21 22:51:07,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:51:07,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:51:07,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:51:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:51:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:51:07,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:51:07,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 22:51:07,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410235887] [2020-12-21 22:51:07,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:51:07,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:51:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:51:07,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:51:07,116 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 14 states. [2020-12-21 22:51:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:51:07,238 INFO L93 Difference]: Finished difference Result 143 states and 170 transitions. [2020-12-21 22:51:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:51:07,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-12-21 22:51:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:51:07,240 INFO L225 Difference]: With dead ends: 143 [2020-12-21 22:51:07,240 INFO L226 Difference]: Without dead ends: 135 [2020-12-21 22:51:07,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:51:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-21 22:51:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 55. [2020-12-21 22:51:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-21 22:51:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-12-21 22:51:07,245 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 48 [2020-12-21 22:51:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:51:07,246 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-12-21 22:51:07,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:51:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-12-21 22:51:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 22:51:07,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:51:07,247 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:51:07,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:51:07,462 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:51:07,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:51:07,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1807704914, now seen corresponding path program 11 times [2020-12-21 22:51:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:51:07,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9992353] [2020-12-21 22:51:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:51:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:51:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:51:07,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9992353] [2020-12-21 22:51:07,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247078897] [2020-12-21 22:51:07,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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