/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/seq-mthreaded/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:31:15,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:31:15,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:31:15,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:31:15,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:31:15,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:31:16,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:31:16,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:31:16,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:31:16,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:31:16,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:31:16,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:31:16,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:31:16,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:31:16,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:31:16,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:31:16,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:31:16,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:31:16,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:31:16,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:31:16,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:31:16,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:31:16,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:31:16,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:31:16,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:31:16,116 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:31:16,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:31:16,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:31:16,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:31:16,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:31:16,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:31:16,117 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:31:16,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:31:16,118 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:31:16,118 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:31:16,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:31:16,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:31:16,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:31:16,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:31:16,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:31:16,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:31:16,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:31:16,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:31:16,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:31:16,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:31:16,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:31:16,120 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:31:16,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:31:16,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:31:16,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:31:16,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:31:16,525 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:31:16,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c [2020-12-22 07:31:16,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a297b295/64269438d7364b8da245822a69673af4/FLAGe72687ca7 [2020-12-22 07:31:17,185 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:31:17,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c [2020-12-22 07:31:17,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a297b295/64269438d7364b8da245822a69673af4/FLAGe72687ca7 [2020-12-22 07:31:17,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a297b295/64269438d7364b8da245822a69673af4 [2020-12-22 07:31:17,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:31:17,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:31:17,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:31:17,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:31:17,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:31:17,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:17,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a22613b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17, skipping insertion in model container [2020-12-22 07:31:17,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:17,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:31:17,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:31:17,836 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/seq-mthreaded/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c[16964,16977] [2020-12-22 07:31:17,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:31:17,855 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:31:17,924 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/seq-mthreaded/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c[16964,16977] [2020-12-22 07:31:17,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:31:17,946 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:31:17,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17 WrapperNode [2020-12-22 07:31:17,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:31:17,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:31:17,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:31:17,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:31:17,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:17,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:18,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:31:18,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:31:18,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:31:18,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:31:18,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:18,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:18,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:18,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:18,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:18,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:18,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (1/1) ... [2020-12-22 07:31:18,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:31:18,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:31:18,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:31:18,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:31:18,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (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 [2020-12-22 07:31:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:31:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:31:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:31:18,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:31:19,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:31:19,286 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 07:31:19,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:31:19 BoogieIcfgContainer [2020-12-22 07:31:19,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:31:19,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:31:19,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:31:19,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:31:19,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:31:17" (1/3) ... [2020-12-22 07:31:19,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf03403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:31:19, skipping insertion in model container [2020-12-22 07:31:19,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:17" (2/3) ... [2020-12-22 07:31:19,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf03403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:31:19, skipping insertion in model container [2020-12-22 07:31:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:31:19" (3/3) ... [2020-12-22 07:31:19,298 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c [2020-12-22 07:31:19,306 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:31:19,312 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:31:19,340 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:31:19,370 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:31:19,370 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:31:19,370 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:31:19,370 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:31:19,371 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:31:19,371 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:31:19,371 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:31:19,371 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:31:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states. [2020-12-22 07:31:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 07:31:19,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:19,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:19,402 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:19,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1143199986, now seen corresponding path program 1 times [2020-12-22 07:31:19,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:19,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944075118] [2020-12-22 07:31:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944075118] [2020-12-22 07:31:19,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:19,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:19,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041019289] [2020-12-22 07:31:19,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:19,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:19,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:19,812 INFO L87 Difference]: Start difference. First operand 146 states. Second operand 5 states. [2020-12-22 07:31:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:20,024 INFO L93 Difference]: Finished difference Result 245 states and 409 transitions. [2020-12-22 07:31:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:20,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 07:31:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:20,040 INFO L225 Difference]: With dead ends: 245 [2020-12-22 07:31:20,041 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 07:31:20,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 07:31:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-12-22 07:31:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-22 07:31:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 200 transitions. [2020-12-22 07:31:20,139 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 200 transitions. Word has length 38 [2020-12-22 07:31:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:20,140 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 200 transitions. [2020-12-22 07:31:20,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:20,140 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 200 transitions. [2020-12-22 07:31:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:31:20,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:20,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:20,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:31:20,144 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1334845828, now seen corresponding path program 1 times [2020-12-22 07:31:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:20,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540252928] [2020-12-22 07:31:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:20,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540252928] [2020-12-22 07:31:20,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:20,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:20,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400577778] [2020-12-22 07:31:20,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:20,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:20,340 INFO L87 Difference]: Start difference. First operand 142 states and 200 transitions. Second operand 3 states. [2020-12-22 07:31:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:20,379 INFO L93 Difference]: Finished difference Result 320 states and 486 transitions. [2020-12-22 07:31:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:20,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:31:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:20,383 INFO L225 Difference]: With dead ends: 320 [2020-12-22 07:31:20,383 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 07:31:20,385 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 [2020-12-22 07:31:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 07:31:20,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-12-22 07:31:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 07:31:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 331 transitions. [2020-12-22 07:31:20,410 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 331 transitions. Word has length 78 [2020-12-22 07:31:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:20,410 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 331 transitions. [2020-12-22 07:31:20,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 331 transitions. [2020-12-22 07:31:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:31:20,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:20,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:20,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:31:20,413 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:20,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1690434603, now seen corresponding path program 1 times [2020-12-22 07:31:20,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:20,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702132458] [2020-12-22 07:31:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:20,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702132458] [2020-12-22 07:31:20,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:20,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:20,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387295622] [2020-12-22 07:31:20,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:20,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:20,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:20,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:20,591 INFO L87 Difference]: Start difference. First operand 223 states and 331 transitions. Second operand 3 states. [2020-12-22 07:31:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:20,631 INFO L93 Difference]: Finished difference Result 551 states and 859 transitions. [2020-12-22 07:31:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:20,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:31:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:20,636 INFO L225 Difference]: With dead ends: 551 [2020-12-22 07:31:20,636 INFO L226 Difference]: Without dead ends: 375 [2020-12-22 07:31:20,637 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 [2020-12-22 07:31:20,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-22 07:31:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2020-12-22 07:31:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-12-22 07:31:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 572 transitions. [2020-12-22 07:31:20,666 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 572 transitions. Word has length 79 [2020-12-22 07:31:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:20,666 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 572 transitions. [2020-12-22 07:31:20,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 572 transitions. [2020-12-22 07:31:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:31:20,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:20,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:20,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:31:20,669 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:20,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1185859852, now seen corresponding path program 1 times [2020-12-22 07:31:20,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:20,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161598646] [2020-12-22 07:31:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:20,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161598646] [2020-12-22 07:31:20,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:20,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:20,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83603147] [2020-12-22 07:31:20,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:20,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:20,854 INFO L87 Difference]: Start difference. First operand 373 states and 572 transitions. Second operand 3 states. [2020-12-22 07:31:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:20,895 INFO L93 Difference]: Finished difference Result 977 states and 1542 transitions. [2020-12-22 07:31:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:20,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:31:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:20,901 INFO L225 Difference]: With dead ends: 977 [2020-12-22 07:31:20,901 INFO L226 Difference]: Without dead ends: 651 [2020-12-22 07:31:20,903 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 [2020-12-22 07:31:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2020-12-22 07:31:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2020-12-22 07:31:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-12-22 07:31:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1012 transitions. [2020-12-22 07:31:20,941 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1012 transitions. Word has length 80 [2020-12-22 07:31:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:20,941 INFO L481 AbstractCegarLoop]: Abstraction has 649 states and 1012 transitions. [2020-12-22 07:31:20,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1012 transitions. [2020-12-22 07:31:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:31:20,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:20,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:20,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:31:20,943 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:20,944 INFO L82 PathProgramCache]: Analyzing trace with hash 600169947, now seen corresponding path program 1 times [2020-12-22 07:31:20,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:20,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299965829] [2020-12-22 07:31:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:21,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299965829] [2020-12-22 07:31:21,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:21,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:21,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121116890] [2020-12-22 07:31:21,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:21,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:21,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:21,050 INFO L87 Difference]: Start difference. First operand 649 states and 1012 transitions. Second operand 3 states. [2020-12-22 07:31:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:21,117 INFO L93 Difference]: Finished difference Result 1757 states and 2782 transitions. [2020-12-22 07:31:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:21,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 07:31:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:21,131 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 07:31:21,132 INFO L226 Difference]: Without dead ends: 1155 [2020-12-22 07:31:21,133 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 [2020-12-22 07:31:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2020-12-22 07:31:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1153. [2020-12-22 07:31:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1153 states. [2020-12-22 07:31:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1808 transitions. [2020-12-22 07:31:21,183 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1808 transitions. Word has length 81 [2020-12-22 07:31:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:21,184 INFO L481 AbstractCegarLoop]: Abstraction has 1153 states and 1808 transitions. [2020-12-22 07:31:21,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:21,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1808 transitions. [2020-12-22 07:31:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:31:21,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:21,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:21,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:31:21,186 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:21,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:21,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1228760164, now seen corresponding path program 1 times [2020-12-22 07:31:21,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:21,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570365530] [2020-12-22 07:31:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:21,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570365530] [2020-12-22 07:31:21,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:21,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:21,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557162062] [2020-12-22 07:31:21,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:21,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:21,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:21,279 INFO L87 Difference]: Start difference. First operand 1153 states and 1808 transitions. Second operand 3 states. [2020-12-22 07:31:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:21,348 INFO L93 Difference]: Finished difference Result 3173 states and 5010 transitions. [2020-12-22 07:31:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:21,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:31:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:21,362 INFO L225 Difference]: With dead ends: 3173 [2020-12-22 07:31:21,362 INFO L226 Difference]: Without dead ends: 2067 [2020-12-22 07:31:21,364 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 [2020-12-22 07:31:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2020-12-22 07:31:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 2065. [2020-12-22 07:31:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-12-22 07:31:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3232 transitions. [2020-12-22 07:31:21,445 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3232 transitions. Word has length 82 [2020-12-22 07:31:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:21,447 INFO L481 AbstractCegarLoop]: Abstraction has 2065 states and 3232 transitions. [2020-12-22 07:31:21,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:21,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3232 transitions. [2020-12-22 07:31:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:31:21,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:21,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:21,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:31:21,452 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:21,454 INFO L82 PathProgramCache]: Analyzing trace with hash -991115381, now seen corresponding path program 1 times [2020-12-22 07:31:21,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:21,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132543089] [2020-12-22 07:31:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:21,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132543089] [2020-12-22 07:31:21,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:21,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:31:21,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741929135] [2020-12-22 07:31:21,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:31:21,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:31:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:31:21,781 INFO L87 Difference]: Start difference. First operand 2065 states and 3232 transitions. Second operand 8 states. [2020-12-22 07:31:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:22,430 INFO L93 Difference]: Finished difference Result 12877 states and 20102 transitions. [2020-12-22 07:31:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:31:22,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-12-22 07:31:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:22,485 INFO L225 Difference]: With dead ends: 12877 [2020-12-22 07:31:22,486 INFO L226 Difference]: Without dead ends: 10859 [2020-12-22 07:31:22,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:31:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2020-12-22 07:31:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 10849. [2020-12-22 07:31:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10849 states. [2020-12-22 07:31:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10849 states to 10849 states and 16880 transitions. [2020-12-22 07:31:23,003 INFO L78 Accepts]: Start accepts. Automaton has 10849 states and 16880 transitions. Word has length 83 [2020-12-22 07:31:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:23,004 INFO L481 AbstractCegarLoop]: Abstraction has 10849 states and 16880 transitions. [2020-12-22 07:31:23,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:31:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10849 states and 16880 transitions. [2020-12-22 07:31:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:31:23,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:23,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:23,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:31:23,007 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash 120110007, now seen corresponding path program 1 times [2020-12-22 07:31:23,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:23,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647851113] [2020-12-22 07:31:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:23,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647851113] [2020-12-22 07:31:23,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:23,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:23,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723179581] [2020-12-22 07:31:23,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:23,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:23,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:23,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:23,135 INFO L87 Difference]: Start difference. First operand 10849 states and 16880 transitions. Second operand 3 states. [2020-12-22 07:31:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:23,754 INFO L93 Difference]: Finished difference Result 29861 states and 46290 transitions. [2020-12-22 07:31:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:23,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 07:31:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:23,841 INFO L225 Difference]: With dead ends: 29861 [2020-12-22 07:31:23,841 INFO L226 Difference]: Without dead ends: 19059 [2020-12-22 07:31:23,857 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 [2020-12-22 07:31:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19059 states. [2020-12-22 07:31:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19059 to 19057. [2020-12-22 07:31:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19057 states. [2020-12-22 07:31:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19057 states to 19057 states and 29264 transitions. [2020-12-22 07:31:24,791 INFO L78 Accepts]: Start accepts. Automaton has 19057 states and 29264 transitions. Word has length 84 [2020-12-22 07:31:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:24,791 INFO L481 AbstractCegarLoop]: Abstraction has 19057 states and 29264 transitions. [2020-12-22 07:31:24,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 19057 states and 29264 transitions. [2020-12-22 07:31:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:31:24,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:24,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:24,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:31:24,794 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1337229271, now seen corresponding path program 1 times [2020-12-22 07:31:24,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:24,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647875440] [2020-12-22 07:31:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:24,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647875440] [2020-12-22 07:31:24,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:24,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:31:24,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553526884] [2020-12-22 07:31:24,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:31:24,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:24,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:31:24,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:31:24,992 INFO L87 Difference]: Start difference. First operand 19057 states and 29264 transitions. Second operand 8 states. [2020-12-22 07:31:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:27,698 INFO L93 Difference]: Finished difference Result 106847 states and 164503 transitions. [2020-12-22 07:31:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:31:27,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 84 [2020-12-22 07:31:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:27,936 INFO L225 Difference]: With dead ends: 106847 [2020-12-22 07:31:27,937 INFO L226 Difference]: Without dead ends: 87837 [2020-12-22 07:31:27,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:31:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87837 states. [2020-12-22 07:31:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87837 to 38065. [2020-12-22 07:31:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38065 states. [2020-12-22 07:31:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38065 states to 38065 states and 57712 transitions. [2020-12-22 07:31:30,466 INFO L78 Accepts]: Start accepts. Automaton has 38065 states and 57712 transitions. Word has length 84 [2020-12-22 07:31:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:30,467 INFO L481 AbstractCegarLoop]: Abstraction has 38065 states and 57712 transitions. [2020-12-22 07:31:30,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:31:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 38065 states and 57712 transitions. [2020-12-22 07:31:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 07:31:30,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:30,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:30,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:31:30,469 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1112242464, now seen corresponding path program 1 times [2020-12-22 07:31:30,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:30,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256399231] [2020-12-22 07:31:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:30,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256399231] [2020-12-22 07:31:30,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:30,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:31:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326444988] [2020-12-22 07:31:30,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:31:30,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:30,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:31:30,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:31:30,778 INFO L87 Difference]: Start difference. First operand 38065 states and 57712 transitions. Second operand 8 states. [2020-12-22 07:31:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:33,671 INFO L93 Difference]: Finished difference Result 79155 states and 118449 transitions. [2020-12-22 07:31:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:31:33,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-12-22 07:31:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:33,842 INFO L225 Difference]: With dead ends: 79155 [2020-12-22 07:31:33,842 INFO L226 Difference]: Without dead ends: 79153 [2020-12-22 07:31:33,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:31:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79153 states. [2020-12-22 07:31:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79153 to 40369. [2020-12-22 07:31:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40369 states. [2020-12-22 07:31:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 60016 transitions. [2020-12-22 07:31:35,943 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 60016 transitions. Word has length 85 [2020-12-22 07:31:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:35,944 INFO L481 AbstractCegarLoop]: Abstraction has 40369 states and 60016 transitions. [2020-12-22 07:31:35,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:31:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 60016 transitions. [2020-12-22 07:31:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 07:31:35,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:35,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:35,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:31:35,946 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:35,947 INFO L82 PathProgramCache]: Analyzing trace with hash 172356833, now seen corresponding path program 1 times [2020-12-22 07:31:35,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:35,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398034162] [2020-12-22 07:31:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:36,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398034162] [2020-12-22 07:31:36,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:36,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:36,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230343625] [2020-12-22 07:31:36,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:36,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:36,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:36,038 INFO L87 Difference]: Start difference. First operand 40369 states and 60016 transitions. Second operand 3 states. [2020-12-22 07:31:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:39,092 INFO L93 Difference]: Finished difference Result 99063 states and 147412 transitions. [2020-12-22 07:31:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:39,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-22 07:31:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:39,179 INFO L225 Difference]: With dead ends: 99063 [2020-12-22 07:31:39,179 INFO L226 Difference]: Without dead ends: 58741 [2020-12-22 07:31:39,227 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 [2020-12-22 07:31:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58741 states. [2020-12-22 07:31:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58741 to 58387. [2020-12-22 07:31:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58387 states. [2020-12-22 07:31:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58387 states to 58387 states and 86386 transitions. [2020-12-22 07:31:41,994 INFO L78 Accepts]: Start accepts. Automaton has 58387 states and 86386 transitions. Word has length 86 [2020-12-22 07:31:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:41,995 INFO L481 AbstractCegarLoop]: Abstraction has 58387 states and 86386 transitions. [2020-12-22 07:31:41,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 58387 states and 86386 transitions. [2020-12-22 07:31:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:31:42,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:42,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:42,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:31:42,027 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash 668753880, now seen corresponding path program 1 times [2020-12-22 07:31:42,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:42,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354548615] [2020-12-22 07:31:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:42,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354548615] [2020-12-22 07:31:42,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842086712] [2020-12-22 07:31:42,354 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 [2020-12-22 07:31:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:42,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:31:42,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:31:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:31:43,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:31:43,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:31:43,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186714325] [2020-12-22 07:31:43,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:31:43,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:43,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:31:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:31:43,142 INFO L87 Difference]: Start difference. First operand 58387 states and 86386 transitions. Second operand 12 states. [2020-12-22 07:31:58,881 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-22 07:32:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:07,882 INFO L93 Difference]: Finished difference Result 482131 states and 707378 transitions. [2020-12-22 07:32:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 07:32:07,883 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 118 [2020-12-22 07:32:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:08,926 INFO L225 Difference]: With dead ends: 482131 [2020-12-22 07:32:08,927 INFO L226 Difference]: Without dead ends: 423793 [2020-12-22 07:32:09,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=666, Invalid=2640, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 07:32:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423793 states. [2020-12-22 07:32:22,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423793 to 212131. [2020-12-22 07:32:22,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212131 states. [2020-12-22 07:32:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212131 states to 212131 states and 309698 transitions. [2020-12-22 07:32:22,666 INFO L78 Accepts]: Start accepts. Automaton has 212131 states and 309698 transitions. Word has length 118 [2020-12-22 07:32:22,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:22,666 INFO L481 AbstractCegarLoop]: Abstraction has 212131 states and 309698 transitions. [2020-12-22 07:32:22,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:32:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 212131 states and 309698 transitions. [2020-12-22 07:32:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:32:23,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:23,020 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:23,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 07:32:23,238 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:23,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1707736999, now seen corresponding path program 1 times [2020-12-22 07:32:23,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:23,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131779055] [2020-12-22 07:32:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:23,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131779055] [2020-12-22 07:32:23,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:23,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:23,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937235880] [2020-12-22 07:32:23,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:23,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:23,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:23,344 INFO L87 Difference]: Start difference. First operand 212131 states and 309698 transitions. Second operand 3 states. [2020-12-22 07:32:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:39,430 INFO L93 Difference]: Finished difference Result 534472 states and 780774 transitions. [2020-12-22 07:32:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:39,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:32:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:40,167 INFO L225 Difference]: With dead ends: 534472 [2020-12-22 07:32:40,168 INFO L226 Difference]: Without dead ends: 349574 [2020-12-22 07:32:40,355 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 [2020-12-22 07:32:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349574 states. [2020-12-22 07:32:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349574 to 349572. [2020-12-22 07:32:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349572 states. [2020-12-22 07:32:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349572 states to 349572 states and 506180 transitions. [2020-12-22 07:32:59,730 INFO L78 Accepts]: Start accepts. Automaton has 349572 states and 506180 transitions. Word has length 118 [2020-12-22 07:32:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:59,730 INFO L481 AbstractCegarLoop]: Abstraction has 349572 states and 506180 transitions. [2020-12-22 07:32:59,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 349572 states and 506180 transitions. [2020-12-22 07:32:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:32:59,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:59,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:32:59,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:32:59,814 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:59,814 INFO L82 PathProgramCache]: Analyzing trace with hash 322125977, now seen corresponding path program 1 times [2020-12-22 07:32:59,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:59,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041023671] [2020-12-22 07:32:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:59,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041023671] [2020-12-22 07:32:59,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:59,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:59,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300125431] [2020-12-22 07:32:59,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:59,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:59,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:59,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:59,901 INFO L87 Difference]: Start difference. First operand 349572 states and 506180 transitions. Second operand 3 states. [2020-12-22 07:33:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:28,120 INFO L93 Difference]: Finished difference Result 890419 states and 1287796 transitions. [2020-12-22 07:33:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:28,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:33:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:29,363 INFO L225 Difference]: With dead ends: 890419 [2020-12-22 07:33:29,363 INFO L226 Difference]: Without dead ends: 594513 [2020-12-22 07:33:29,689 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 [2020-12-22 07:33:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594513 states.