/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:03:04,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:03:04,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:03:04,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:03:04,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:03:04,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:03:04,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:03:04,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:03:04,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:03:04,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:03:04,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:03:04,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:03:04,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:03:04,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:03:04,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:03:04,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:03:04,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:03:04,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:03:04,678 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:03:04,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:03:04,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:03:04,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:03:04,686 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:03:04,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:03:04,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:03:04,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:03:04,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:03:04,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:03:04,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:03:04,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:03:04,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:03:04,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:03:04,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:03:04,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:03:04,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:03:04,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:03:04,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:03:04,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:03:04,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:03:04,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:03:04,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:03:04,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:03:04,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:03:04,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:03:05,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:03:05,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:03:05,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:03:05,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:03:05,395 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:03:05,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label43.c [2020-12-22 03:03:05,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb57624d/f0bff5ac989143f2ae14b1e58e739890/FLAG369c337ff [2020-12-22 03:03:06,920 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:03:06,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label43.c [2020-12-22 03:03:07,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb57624d/f0bff5ac989143f2ae14b1e58e739890/FLAG369c337ff [2020-12-22 03:03:07,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb57624d/f0bff5ac989143f2ae14b1e58e739890 [2020-12-22 03:03:07,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:03:07,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:03:07,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:03:07,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:03:07,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:03:07,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:03:07" (1/1) ... [2020-12-22 03:03:07,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9769e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:07, skipping insertion in model container [2020-12-22 03:03:07,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:03:07" (1/1) ... [2020-12-22 03:03:07,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:03:07,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:03:07,979 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_label43.c[3247,3260] [2020-12-22 03:03:09,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:03:09,848 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:03:09,871 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_label43.c[3247,3260] [2020-12-22 03:03:11,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:03:11,324 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:03:11,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11 WrapperNode [2020-12-22 03:03:11,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:03:11,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:03:11,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:03:11,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:03:11,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:11,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:12,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:03:12,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:03:12,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:03:12,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:03:12,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:12,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:13,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:13,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:14,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:14,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:14,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (1/1) ... [2020-12-22 03:03:14,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:03:14,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:03:14,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:03:14,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:03:14,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (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 03:03:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:03:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:03:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:03:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:03:29,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:03:29,833 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 03:03:29,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:03:29 BoogieIcfgContainer [2020-12-22 03:03:29,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:03:29,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:03:29,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:03:29,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:03:29,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:03:07" (1/3) ... [2020-12-22 03:03:29,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713295bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:03:29, skipping insertion in model container [2020-12-22 03:03:29,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:03:11" (2/3) ... [2020-12-22 03:03:29,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713295bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:03:29, skipping insertion in model container [2020-12-22 03:03:29,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:03:29" (3/3) ... [2020-12-22 03:03:29,870 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2020-12-22 03:03:29,883 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:03:29,893 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:03:29,928 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:03:30,005 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:03:30,006 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:03:30,006 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:03:30,006 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:03:30,006 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:03:30,006 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:03:30,006 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:03:30,007 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:03:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states. [2020-12-22 03:03:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 03:03:30,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:03:30,112 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] [2020-12-22 03:03:30,113 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:03:30,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:03:30,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2020-12-22 03:03:30,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:03:30,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557254564] [2020-12-22 03:03:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:03:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:03:30,743 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 03:03:30,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557254564] [2020-12-22 03:03:30,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:03:30,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:03:30,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604585397] [2020-12-22 03:03:30,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:03:30,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:03:30,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:03:30,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:03:30,784 INFO L87 Difference]: Start difference. First operand 1748 states. Second operand 3 states. [2020-12-22 03:03:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:03:48,826 INFO L93 Difference]: Finished difference Result 4992 states and 9449 transitions. [2020-12-22 03:03:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:03:48,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-22 03:03:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:03:48,894 INFO L225 Difference]: With dead ends: 4992 [2020-12-22 03:03:48,894 INFO L226 Difference]: Without dead ends: 3180 [2020-12-22 03:03:48,910 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 03:03:48,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2020-12-22 03:03:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3122. [2020-12-22 03:03:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3122 states. [2020-12-22 03:03:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 5394 transitions. [2020-12-22 03:03:49,201 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 5394 transitions. Word has length 22 [2020-12-22 03:03:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:03:49,202 INFO L481 AbstractCegarLoop]: Abstraction has 3122 states and 5394 transitions. [2020-12-22 03:03:49,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:03:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 5394 transitions. [2020-12-22 03:03:49,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 03:03:49,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:03:49,208 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 03:03:49,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:03:49,209 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:03:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:03:49,211 INFO L82 PathProgramCache]: Analyzing trace with hash 471392806, now seen corresponding path program 1 times [2020-12-22 03:03:49,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:03:49,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644671377] [2020-12-22 03:03:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:03:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:03:49,616 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 03:03:49,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644671377] [2020-12-22 03:03:49,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:03:49,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:03:49,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461571050] [2020-12-22 03:03:49,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:03:49,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:03:49,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:03:49,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:03:49,628 INFO L87 Difference]: Start difference. First operand 3122 states and 5394 transitions. Second operand 4 states. [2020-12-22 03:04:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:04:27,613 INFO L93 Difference]: Finished difference Result 10361 states and 17849 transitions. [2020-12-22 03:04:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:04:27,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-22 03:04:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:04:27,677 INFO L225 Difference]: With dead ends: 10361 [2020-12-22 03:04:27,678 INFO L226 Difference]: Without dead ends: 7241 [2020-12-22 03:04:27,690 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 03:04:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7241 states. [2020-12-22 03:04:27,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7241 to 7239. [2020-12-22 03:04:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7239 states. [2020-12-22 03:04:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7239 states to 7239 states and 11243 transitions. [2020-12-22 03:04:27,993 INFO L78 Accepts]: Start accepts. Automaton has 7239 states and 11243 transitions. Word has length 90 [2020-12-22 03:04:27,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:04:27,995 INFO L481 AbstractCegarLoop]: Abstraction has 7239 states and 11243 transitions. [2020-12-22 03:04:27,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:04:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7239 states and 11243 transitions. [2020-12-22 03:04:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-12-22 03:04:28,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:04:28,019 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:04:28,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:04:28,020 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:04:28,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:04:28,023 INFO L82 PathProgramCache]: Analyzing trace with hash -633471131, now seen corresponding path program 1 times [2020-12-22 03:04:28,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:04:28,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435948513] [2020-12-22 03:04:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:04:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:04:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 03:04:29,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435948513] [2020-12-22 03:04:29,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:04:29,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:04:29,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947931765] [2020-12-22 03:04:29,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:04:29,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:04:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:04:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:04:29,165 INFO L87 Difference]: Start difference. First operand 7239 states and 11243 transitions. Second operand 4 states. [2020-12-22 03:05:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:05:01,717 INFO L93 Difference]: Finished difference Result 19987 states and 32914 transitions. [2020-12-22 03:05:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:05:01,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 297 [2020-12-22 03:05:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:05:01,802 INFO L225 Difference]: With dead ends: 19987 [2020-12-22 03:05:01,802 INFO L226 Difference]: Without dead ends: 14115 [2020-12-22 03:05:01,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:05:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2020-12-22 03:05:02,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 14098. [2020-12-22 03:05:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14098 states. [2020-12-22 03:05:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14098 states to 14098 states and 18875 transitions. [2020-12-22 03:05:02,172 INFO L78 Accepts]: Start accepts. Automaton has 14098 states and 18875 transitions. Word has length 297 [2020-12-22 03:05:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:05:02,173 INFO L481 AbstractCegarLoop]: Abstraction has 14098 states and 18875 transitions. [2020-12-22 03:05:02,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:05:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 14098 states and 18875 transitions. [2020-12-22 03:05:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-12-22 03:05:02,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:05:02,182 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:02,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:05:02,183 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:05:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:05:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2108979265, now seen corresponding path program 1 times [2020-12-22 03:05:02,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:05:02,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560169939] [2020-12-22 03:05:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:05:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:05:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:05:02,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560169939] [2020-12-22 03:05:02,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:05:02,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:05:02,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144082599] [2020-12-22 03:05:02,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 03:05:02,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:05:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 03:05:02,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 03:05:02,960 INFO L87 Difference]: Start difference. First operand 14098 states and 18875 transitions. Second operand 4 states. [2020-12-22 03:05:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:05:23,164 INFO L93 Difference]: Finished difference Result 25495 states and 35031 transitions. [2020-12-22 03:05:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:05:23,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-12-22 03:05:23,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:05:23,232 INFO L225 Difference]: With dead ends: 25495 [2020-12-22 03:05:23,232 INFO L226 Difference]: Without dead ends: 14098 [2020-12-22 03:05:23,249 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 03:05:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14098 states. [2020-12-22 03:05:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14098 to 14098. [2020-12-22 03:05:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14098 states. [2020-12-22 03:05:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14098 states to 14098 states and 18862 transitions. [2020-12-22 03:05:23,528 INFO L78 Accepts]: Start accepts. Automaton has 14098 states and 18862 transitions. Word has length 325 [2020-12-22 03:05:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:05:23,529 INFO L481 AbstractCegarLoop]: Abstraction has 14098 states and 18862 transitions. [2020-12-22 03:05:23,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 03:05:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 14098 states and 18862 transitions. [2020-12-22 03:05:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2020-12-22 03:05:23,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:05:23,544 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:23,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:05:23,544 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:05:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:05:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1954276413, now seen corresponding path program 1 times [2020-12-22 03:05:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:05:23,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884149175] [2020-12-22 03:05:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:05:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:05:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 03:05:24,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884149175] [2020-12-22 03:05:24,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:05:24,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:05:24,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485098147] [2020-12-22 03:05:24,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:05:24,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:05:24,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:05:24,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:05:24,911 INFO L87 Difference]: Start difference. First operand 14098 states and 18862 transitions. Second operand 3 states. [2020-12-22 03:05:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:05:47,006 INFO L93 Difference]: Finished difference Result 35238 states and 49292 transitions. [2020-12-22 03:05:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:05:47,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 580 [2020-12-22 03:05:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:05:47,069 INFO L225 Difference]: With dead ends: 35238 [2020-12-22 03:05:47,070 INFO L226 Difference]: Without dead ends: 23872 [2020-12-22 03:05:47,089 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 03:05:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23872 states. [2020-12-22 03:05:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23872 to 23850. [2020-12-22 03:05:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23850 states. [2020-12-22 03:05:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23850 states to 23850 states and 29965 transitions. [2020-12-22 03:05:47,513 INFO L78 Accepts]: Start accepts. Automaton has 23850 states and 29965 transitions. Word has length 580 [2020-12-22 03:05:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:05:47,515 INFO L481 AbstractCegarLoop]: Abstraction has 23850 states and 29965 transitions. [2020-12-22 03:05:47,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:05:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 23850 states and 29965 transitions. [2020-12-22 03:05:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-12-22 03:05:47,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:05:47,531 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:05:47,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 03:05:47,532 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:05:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:05:47,532 INFO L82 PathProgramCache]: Analyzing trace with hash 720817972, now seen corresponding path program 1 times [2020-12-22 03:05:47,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:05:47,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776338251] [2020-12-22 03:05:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:05:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:05:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-22 03:05:48,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776338251] [2020-12-22 03:05:48,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:05:48,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:05:48,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009555896] [2020-12-22 03:05:48,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:05:48,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:05:48,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:05:48,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:05:48,793 INFO L87 Difference]: Start difference. First operand 23850 states and 29965 transitions. Second operand 3 states. [2020-12-22 03:06:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:06:19,043 INFO L93 Difference]: Finished difference Result 64265 states and 82365 transitions. [2020-12-22 03:06:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:06:19,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 586 [2020-12-22 03:06:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:06:19,138 INFO L225 Difference]: With dead ends: 64265 [2020-12-22 03:06:19,139 INFO L226 Difference]: Without dead ends: 43147 [2020-12-22 03:06:19,171 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 03:06:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43147 states. [2020-12-22 03:06:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43147 to 40413. [2020-12-22 03:06:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40413 states. [2020-12-22 03:06:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40413 states to 40413 states and 50504 transitions. [2020-12-22 03:06:20,046 INFO L78 Accepts]: Start accepts. Automaton has 40413 states and 50504 transitions. Word has length 586 [2020-12-22 03:06:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:06:20,048 INFO L481 AbstractCegarLoop]: Abstraction has 40413 states and 50504 transitions. [2020-12-22 03:06:20,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:06:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 40413 states and 50504 transitions. [2020-12-22 03:06:20,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2020-12-22 03:06:20,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:06:20,074 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 03:06:20,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:06:20,074 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:06:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:06:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1039993644, now seen corresponding path program 1 times [2020-12-22 03:06:20,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:06:20,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094328715] [2020-12-22 03:06:20,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:06:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:06:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-12-22 03:06:21,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094328715] [2020-12-22 03:06:21,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:06:21,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:06:21,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409841061] [2020-12-22 03:06:21,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:06:21,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:06:21,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:06:21,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:06:21,055 INFO L87 Difference]: Start difference. First operand 40413 states and 50504 transitions. Second operand 3 states. [2020-12-22 03:06:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:06:59,641 INFO L93 Difference]: Finished difference Result 97346 states and 123664 transitions. [2020-12-22 03:06:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:06:59,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 721 [2020-12-22 03:06:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:06:59,790 INFO L225 Difference]: With dead ends: 97346 [2020-12-22 03:06:59,790 INFO L226 Difference]: Without dead ends: 59665 [2020-12-22 03:06:59,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 03:06:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59665 states.