/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/eca-rers2012/Problem19_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:55:26,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:55:26,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:55:26,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:55:26,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:55:26,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:55:26,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:55:26,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:55:26,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:55:26,861 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:55:26,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:55:26,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:55:26,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:55:26,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:55:26,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:55:26,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:55:26,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:55:26,867 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:55:26,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:55:26,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:55:26,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:55:26,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:55:26,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:55:26,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:55:26,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:55:26,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:55:26,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:55:26,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:55:26,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:55:26,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:55:26,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:55:27,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:55:27,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:55:27,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:55:27,431 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:55:27,432 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:55:27,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label16.c [2020-12-22 02:55:27,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a9ebc65/faebba580feb49629ca2a5d16a01c677/FLAGd38b78c56 [2020-12-22 02:55:28,951 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:55:28,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label16.c [2020-12-22 02:55:29,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a9ebc65/faebba580feb49629ca2a5d16a01c677/FLAGd38b78c56 [2020-12-22 02:55:29,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6a9ebc65/faebba580feb49629ca2a5d16a01c677 [2020-12-22 02:55:29,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:55:29,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:55:29,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:55:29,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:55:29,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:55:29,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:55:29" (1/1) ... [2020-12-22 02:55:29,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4667f99a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:29, skipping insertion in model container [2020-12-22 02:55:29,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:55:29" (1/1) ... [2020-12-22 02:55:29,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:55:29,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:55:30,028 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/eca-rers2012/Problem19_label16.c[6966,6979] [2020-12-22 02:55:32,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:55:32,036 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:55:32,140 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/eca-rers2012/Problem19_label16.c[6966,6979] [2020-12-22 02:55:33,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:55:33,319 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:55:33,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33 WrapperNode [2020-12-22 02:55:33,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:55:33,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:55:33,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:55:33,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:55:33,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:33,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:34,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:55:34,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:55:34,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:55:34,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:55:34,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:34,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:35,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:35,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:35,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:35,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:36,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (1/1) ... [2020-12-22 02:55:36,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:55:36,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:55:36,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:55:36,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:55:36,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (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 [2020-12-22 02:55:36,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:55:36,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:55:36,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:55:36,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:55:49,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:55:49,229 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 02:55:49,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:55:49 BoogieIcfgContainer [2020-12-22 02:55:49,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:55:49,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:55:49,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:55:49,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:55:49,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:55:29" (1/3) ... [2020-12-22 02:55:49,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f002fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:55:49, skipping insertion in model container [2020-12-22 02:55:49,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:55:33" (2/3) ... [2020-12-22 02:55:49,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f002fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:55:49, skipping insertion in model container [2020-12-22 02:55:49,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:55:49" (3/3) ... [2020-12-22 02:55:49,250 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label16.c [2020-12-22 02:55:49,260 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:55:49,270 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:55:49,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:55:49,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:55:49,355 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:55:49,355 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:55:49,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:55:49,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:55:49,356 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:55:49,356 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:55:49,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:55:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states. [2020-12-22 02:55:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 02:55:49,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:55:49,432 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] [2020-12-22 02:55:49,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:55:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:55:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash -92557335, now seen corresponding path program 1 times [2020-12-22 02:55:49,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:55:49,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911979858] [2020-12-22 02:55:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:55:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:55:50,113 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 02:55:50,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911979858] [2020-12-22 02:55:50,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:55:50,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:55:50,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541856536] [2020-12-22 02:55:50,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:55:50,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:55:50,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:55:50,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:55:50,158 INFO L87 Difference]: Start difference. First operand 1748 states. Second operand 4 states. [2020-12-22 02:56:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:56:22,077 INFO L93 Difference]: Finished difference Result 6284 states and 12039 transitions. [2020-12-22 02:56:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:56:22,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-12-22 02:56:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:56:22,152 INFO L225 Difference]: With dead ends: 6284 [2020-12-22 02:56:22,153 INFO L226 Difference]: Without dead ends: 4467 [2020-12-22 02:56:22,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:56:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2020-12-22 02:56:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 4465. [2020-12-22 02:56:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4465 states. [2020-12-22 02:56:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 6984 transitions. [2020-12-22 02:56:22,441 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 6984 transitions. Word has length 53 [2020-12-22 02:56:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:56:22,442 INFO L481 AbstractCegarLoop]: Abstraction has 4465 states and 6984 transitions. [2020-12-22 02:56:22,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:56:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 6984 transitions. [2020-12-22 02:56:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-12-22 02:56:22,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:56:22,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:56:22,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:56:22,458 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:56:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:56:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -612577461, now seen corresponding path program 1 times [2020-12-22 02:56:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:56:22,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052771691] [2020-12-22 02:56:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:56:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:56:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:56:23,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052771691] [2020-12-22 02:56:23,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:56:23,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:56:23,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814106050] [2020-12-22 02:56:23,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:56:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:56:23,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:56:23,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:56:23,518 INFO L87 Difference]: Start difference. First operand 4465 states and 6984 transitions. Second operand 4 states. [2020-12-22 02:56:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:56:50,108 INFO L93 Difference]: Finished difference Result 11706 states and 20175 transitions. [2020-12-22 02:56:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:56:50,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2020-12-22 02:56:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:56:50,156 INFO L225 Difference]: With dead ends: 11706 [2020-12-22 02:56:50,156 INFO L226 Difference]: Without dead ends: 8608 [2020-12-22 02:56:50,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:56:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2020-12-22 02:56:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 8594. [2020-12-22 02:56:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8594 states. [2020-12-22 02:56:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8594 states to 8594 states and 11584 transitions. [2020-12-22 02:56:50,374 INFO L78 Accepts]: Start accepts. Automaton has 8594 states and 11584 transitions. Word has length 260 [2020-12-22 02:56:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:56:50,376 INFO L481 AbstractCegarLoop]: Abstraction has 8594 states and 11584 transitions. [2020-12-22 02:56:50,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:56:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 8594 states and 11584 transitions. [2020-12-22 02:56:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-12-22 02:56:50,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:56:50,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:56:50,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:56:50,389 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:56:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:56:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1120334641, now seen corresponding path program 1 times [2020-12-22 02:56:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:56:50,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749045536] [2020-12-22 02:56:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:56:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:56:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:56:51,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749045536] [2020-12-22 02:56:51,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:56:51,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:56:51,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474994806] [2020-12-22 02:56:51,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:56:51,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:56:51,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:56:51,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:56:51,370 INFO L87 Difference]: Start difference. First operand 8594 states and 11584 transitions. Second operand 4 states. [2020-12-22 02:57:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:57:08,298 INFO L93 Difference]: Finished difference Result 14487 states and 20449 transitions. [2020-12-22 02:57:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:57:08,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 288 [2020-12-22 02:57:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:57:08,343 INFO L225 Difference]: With dead ends: 14487 [2020-12-22 02:57:08,345 INFO L226 Difference]: Without dead ends: 8594 [2020-12-22 02:57:08,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:57:08,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8594 states. [2020-12-22 02:57:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8594 to 8594. [2020-12-22 02:57:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8594 states. [2020-12-22 02:57:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8594 states to 8594 states and 11571 transitions. [2020-12-22 02:57:08,605 INFO L78 Accepts]: Start accepts. Automaton has 8594 states and 11571 transitions. Word has length 288 [2020-12-22 02:57:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:57:08,614 INFO L481 AbstractCegarLoop]: Abstraction has 8594 states and 11571 transitions. [2020-12-22 02:57:08,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:57:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 8594 states and 11571 transitions. [2020-12-22 02:57:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-12-22 02:57:08,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:57:08,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:57:08,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:57:08,632 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:57:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:57:08,634 INFO L82 PathProgramCache]: Analyzing trace with hash 3636171, now seen corresponding path program 1 times [2020-12-22 02:57:08,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:57:08,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242320178] [2020-12-22 02:57:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:57:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:57:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:57:10,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242320178] [2020-12-22 02:57:10,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296870213] [2020-12-22 02:57:10,967 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 02:57:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:57:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:57:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:57:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:57:13,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:57:13,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 02:57:13,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475421977] [2020-12-22 02:57:13,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:57:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:57:13,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:57:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:57:13,074 INFO L87 Difference]: Start difference. First operand 8594 states and 11571 transitions. Second operand 3 states. [2020-12-22 02:57:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:57:33,123 INFO L93 Difference]: Finished difference Result 19934 states and 28693 transitions. [2020-12-22 02:57:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:57:33,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 609 [2020-12-22 02:57:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:57:33,172 INFO L225 Difference]: With dead ends: 19934 [2020-12-22 02:57:33,172 INFO L226 Difference]: Without dead ends: 14072 [2020-12-22 02:57:33,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:57:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14072 states. [2020-12-22 02:57:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14072 to 14072. [2020-12-22 02:57:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14072 states. [2020-12-22 02:57:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14072 states to 14072 states and 17858 transitions. [2020-12-22 02:57:33,453 INFO L78 Accepts]: Start accepts. Automaton has 14072 states and 17858 transitions. Word has length 609 [2020-12-22 02:57:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:57:33,455 INFO L481 AbstractCegarLoop]: Abstraction has 14072 states and 17858 transitions. [2020-12-22 02:57:33,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:57:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 14072 states and 17858 transitions. [2020-12-22 02:57:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2020-12-22 02:57:33,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:57:33,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:57:33,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:57:33,687 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:57:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:57:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1274184982, now seen corresponding path program 1 times [2020-12-22 02:57:33,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:57:33,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895558172] [2020-12-22 02:57:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:57:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:57:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-22 02:57:34,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895558172] [2020-12-22 02:57:34,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:57:34,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:57:34,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949045267] [2020-12-22 02:57:34,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:57:34,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:57:34,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:57:34,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:57:34,591 INFO L87 Difference]: Start difference. First operand 14072 states and 17858 transitions. Second operand 3 states. [2020-12-22 02:57:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:57:59,532 INFO L93 Difference]: Finished difference Result 28158 states and 37095 transitions. [2020-12-22 02:57:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:57:59,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 614 [2020-12-22 02:57:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:57:59,588 INFO L225 Difference]: With dead ends: 28158 [2020-12-22 02:57:59,588 INFO L226 Difference]: Without dead ends: 16818 [2020-12-22 02:57:59,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:57:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16818 states. [2020-12-22 02:57:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16818 to 16809. [2020-12-22 02:57:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16809 states. [2020-12-22 02:57:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16809 states to 16809 states and 21320 transitions. [2020-12-22 02:57:59,951 INFO L78 Accepts]: Start accepts. Automaton has 16809 states and 21320 transitions. Word has length 614 [2020-12-22 02:57:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:57:59,953 INFO L481 AbstractCegarLoop]: Abstraction has 16809 states and 21320 transitions. [2020-12-22 02:57:59,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:57:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 16809 states and 21320 transitions. [2020-12-22 02:57:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2020-12-22 02:57:59,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:57:59,972 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:57:59,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:57:59,973 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:57:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:57:59,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1379079073, now seen corresponding path program 1 times [2020-12-22 02:57:59,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:57:59,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101573139] [2020-12-22 02:57:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:58:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:58:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-22 02:58:00,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101573139] [2020-12-22 02:58:00,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:58:00,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:58:00,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412558027] [2020-12-22 02:58:00,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:58:00,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:58:00,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:58:00,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:58:00,942 INFO L87 Difference]: Start difference. First operand 16809 states and 21320 transitions. Second operand 3 states. [2020-12-22 02:58:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:58:32,464 INFO L93 Difference]: Finished difference Result 43346 states and 56726 transitions. [2020-12-22 02:58:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:58:32,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 617 [2020-12-22 02:58:32,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:58:32,556 INFO L225 Difference]: With dead ends: 43346 [2020-12-22 02:58:32,557 INFO L226 Difference]: Without dead ends: 29269 [2020-12-22 02:58:32,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:58:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29269 states. [2020-12-22 02:58:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29269 to 29266. [2020-12-22 02:58:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29266 states. [2020-12-22 02:58:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29266 states to 29266 states and 36704 transitions. [2020-12-22 02:58:33,062 INFO L78 Accepts]: Start accepts. Automaton has 29266 states and 36704 transitions. Word has length 617 [2020-12-22 02:58:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:58:33,071 INFO L481 AbstractCegarLoop]: Abstraction has 29266 states and 36704 transitions. [2020-12-22 02:58:33,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:58:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 29266 states and 36704 transitions. [2020-12-22 02:58:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2020-12-22 02:58:33,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:58:33,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:58:33,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:58:33,082 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:58:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:58:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1039811229, now seen corresponding path program 1 times [2020-12-22 02:58:33,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:58:33,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766826443] [2020-12-22 02:58:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:58:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:58:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:58:35,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766826443] [2020-12-22 02:58:35,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:58:35,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:58:35,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497108476] [2020-12-22 02:58:35,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 02:58:35,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:58:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 02:58:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:58:35,182 INFO L87 Difference]: Start difference. First operand 29266 states and 36704 transitions. Second operand 5 states. [2020-12-22 02:59:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:59:22,947 INFO L93 Difference]: Finished difference Result 62661 states and 77969 transitions. [2020-12-22 02:59:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 02:59:22,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 644 [2020-12-22 02:59:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:59:23,037 INFO L225 Difference]: With dead ends: 62661 [2020-12-22 02:59:23,037 INFO L226 Difference]: Without dead ends: 36101 [2020-12-22 02:59:23,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:59:23,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36101 states. [2020-12-22 02:59:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36101 to 34733. [2020-12-22 02:59:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34733 states. [2020-12-22 02:59:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34733 states to 34733 states and 42408 transitions. [2020-12-22 02:59:23,650 INFO L78 Accepts]: Start accepts. Automaton has 34733 states and 42408 transitions. Word has length 644 [2020-12-22 02:59:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:59:23,651 INFO L481 AbstractCegarLoop]: Abstraction has 34733 states and 42408 transitions. [2020-12-22 02:59:23,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 02:59:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 34733 states and 42408 transitions. [2020-12-22 02:59:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 847 [2020-12-22 02:59:23,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:59:23,671 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:59:23,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:59:23,671 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:59:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:59:23,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2131481679, now seen corresponding path program 1 times [2020-12-22 02:59:23,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:59:23,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038814207] [2020-12-22 02:59:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:59:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:59:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2020-12-22 02:59:25,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038814207] [2020-12-22 02:59:25,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:59:25,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:59:25,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155155649] [2020-12-22 02:59:25,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:59:25,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:59:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:59:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:59:25,342 INFO L87 Difference]: Start difference. First operand 34733 states and 42408 transitions. Second operand 3 states.