/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/Problem13_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:48:07,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:48:07,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:48:07,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:48:07,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 01:48:07,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 01:48:07,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 01:48:07,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 01:48:07,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 01:48:07,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 01:48:07,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 01:48:07,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 01:48:07,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 01:48:07,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 01:48:07,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 01:48:07,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 01:48:07,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 01:48:07,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 01:48:07,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 01:48:07,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 01:48:07,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:48:07,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:48:07,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:48:07,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:48:07,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:48:07,305 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:48:07,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:48:07,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:48:07,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:48:07,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:48:07,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:48:07,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:48:07,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:48:07,310 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:48:07,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:48:07,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:48:07,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:48:07,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:48:07,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:48:07,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:48:07,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:48:07,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:48:07,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:48:07,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:48:07,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:48:07,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:48:07,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:48:07,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:48:07,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:48:07,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:48:07,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:48:07,802 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:48:07,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2020-12-22 01:48:07,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0182eec53/7ddb1f8106864adcad1f8866190bc59e/FLAGbcebc74d2 [2020-12-22 01:48:09,149 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:48:09,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2020-12-22 01:48:09,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0182eec53/7ddb1f8106864adcad1f8866190bc59e/FLAGbcebc74d2 [2020-12-22 01:48:09,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0182eec53/7ddb1f8106864adcad1f8866190bc59e [2020-12-22 01:48:09,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:48:09,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:48:09,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:48:09,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:48:09,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:48:09,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:48:09" (1/1) ... [2020-12-22 01:48:09,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c5af6ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:09, skipping insertion in model container [2020-12-22 01:48:09,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:48:09" (1/1) ... [2020-12-22 01:48:09,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:48:09,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:48:10,285 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/Problem13_label50.c[8814,8827] [2020-12-22 01:48:11,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:48:11,645 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:48:11,716 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/Problem13_label50.c[8814,8827] [2020-12-22 01:48:12,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:48:12,577 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:48:12,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12 WrapperNode [2020-12-22 01:48:12,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:48:12,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:48:12,581 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:48:12,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:48:12,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:12,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:13,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:48:13,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:48:13,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:48:13,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:48:13,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:13,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:13,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:13,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:14,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:14,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:14,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (1/1) ... [2020-12-22 01:48:14,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:48:14,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:48:14,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:48:14,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:48:14,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (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 01:48:14,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:48:14,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:48:14,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:48:14,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:48:22,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:48:22,928 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:48:22,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:48:22 BoogieIcfgContainer [2020-12-22 01:48:22,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:48:22,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:48:22,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:48:22,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:48:22,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:48:09" (1/3) ... [2020-12-22 01:48:22,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353d28ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:48:22, skipping insertion in model container [2020-12-22 01:48:22,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:48:12" (2/3) ... [2020-12-22 01:48:22,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353d28ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:48:22, skipping insertion in model container [2020-12-22 01:48:22,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:48:22" (3/3) ... [2020-12-22 01:48:22,947 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label50.c [2020-12-22 01:48:22,956 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:48:22,964 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:48:22,991 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:48:23,036 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:48:23,036 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:48:23,037 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:48:23,037 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:48:23,037 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:48:23,037 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:48:23,037 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:48:23,038 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:48:23,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states. [2020-12-22 01:48:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 01:48:23,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:48:23,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:48:23,097 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:48:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:48:23,107 INFO L82 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2020-12-22 01:48:23,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:48:23,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793543818] [2020-12-22 01:48:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:48:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:48:23,626 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 01:48:23,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793543818] [2020-12-22 01:48:23,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:48:23,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:48:23,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472888731] [2020-12-22 01:48:23,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:48:23,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:48:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:48:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:48:23,670 INFO L87 Difference]: Start difference. First operand 1098 states. Second operand 3 states. [2020-12-22 01:48:32,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:48:32,277 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2020-12-22 01:48:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:48:32,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 01:48:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:48:32,326 INFO L225 Difference]: With dead ends: 3035 [2020-12-22 01:48:32,327 INFO L226 Difference]: Without dead ends: 1873 [2020-12-22 01:48:32,342 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 01:48:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-12-22 01:48:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2020-12-22 01:48:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1859 states. [2020-12-22 01:48:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2020-12-22 01:48:32,535 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 62 [2020-12-22 01:48:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:48:32,536 INFO L481 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2020-12-22 01:48:32,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:48:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2020-12-22 01:48:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 01:48:32,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:48:32,544 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, 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] [2020-12-22 01:48:32,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:48:32,544 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:48:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:48:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1446358805, now seen corresponding path program 1 times [2020-12-22 01:48:32,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:48:32,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50285854] [2020-12-22 01:48:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:48:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:48:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:48:32,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50285854] [2020-12-22 01:48:32,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:48:32,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:48:32,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246839391] [2020-12-22 01:48:32,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:48:32,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:48:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:48:32,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:48:32,864 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand 3 states. [2020-12-22 01:48:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:48:41,745 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2020-12-22 01:48:41,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:48:41,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 01:48:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:48:41,771 INFO L225 Difference]: With dead ends: 5317 [2020-12-22 01:48:41,772 INFO L226 Difference]: Without dead ends: 3460 [2020-12-22 01:48:41,778 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 01:48:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2020-12-22 01:48:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2020-12-22 01:48:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3459 states. [2020-12-22 01:48:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2020-12-22 01:48:41,895 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 134 [2020-12-22 01:48:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:48:41,896 INFO L481 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2020-12-22 01:48:41,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:48:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2020-12-22 01:48:41,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 01:48:41,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:48:41,901 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, 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] [2020-12-22 01:48:41,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:48:41,902 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:48:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:48:41,903 INFO L82 PathProgramCache]: Analyzing trace with hash 475000780, now seen corresponding path program 1 times [2020-12-22 01:48:41,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:48:41,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303094833] [2020-12-22 01:48:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:48:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:48:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:48:42,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303094833] [2020-12-22 01:48:42,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:48:42,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:48:42,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288988935] [2020-12-22 01:48:42,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:48:42,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:48:42,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:48:42,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:48:42,204 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand 3 states. [2020-12-22 01:48:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:48:50,739 INFO L93 Difference]: Finished difference Result 10097 states and 13940 transitions. [2020-12-22 01:48:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:48:50,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-22 01:48:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:48:50,786 INFO L225 Difference]: With dead ends: 10097 [2020-12-22 01:48:50,786 INFO L226 Difference]: Without dead ends: 6640 [2020-12-22 01:48:50,795 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 01:48:50,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2020-12-22 01:48:50,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 6631. [2020-12-22 01:48:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6631 states. [2020-12-22 01:48:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6631 states to 6631 states and 8435 transitions. [2020-12-22 01:48:51,005 INFO L78 Accepts]: Start accepts. Automaton has 6631 states and 8435 transitions. Word has length 148 [2020-12-22 01:48:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:48:51,014 INFO L481 AbstractCegarLoop]: Abstraction has 6631 states and 8435 transitions. [2020-12-22 01:48:51,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:48:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6631 states and 8435 transitions. [2020-12-22 01:48:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 01:48:51,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:48:51,023 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, 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] [2020-12-22 01:48:51,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:48:51,024 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:48:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:48:51,025 INFO L82 PathProgramCache]: Analyzing trace with hash 561170870, now seen corresponding path program 1 times [2020-12-22 01:48:51,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:48:51,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779798420] [2020-12-22 01:48:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:48:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:48:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:48:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779798420] [2020-12-22 01:48:51,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:48:51,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:48:51,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219836991] [2020-12-22 01:48:51,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:48:51,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:48:51,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:48:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:48:51,391 INFO L87 Difference]: Start difference. First operand 6631 states and 8435 transitions. Second operand 3 states. [2020-12-22 01:48:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:48:59,334 INFO L93 Difference]: Finished difference Result 14047 states and 17670 transitions. [2020-12-22 01:48:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:48:59,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2020-12-22 01:48:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:48:59,380 INFO L225 Difference]: With dead ends: 14047 [2020-12-22 01:48:59,381 INFO L226 Difference]: Without dead ends: 7418 [2020-12-22 01:48:59,395 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 01:48:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7418 states. [2020-12-22 01:48:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7418 to 7418. [2020-12-22 01:48:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7418 states. [2020-12-22 01:48:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7418 states to 7418 states and 9227 transitions. [2020-12-22 01:48:59,621 INFO L78 Accepts]: Start accepts. Automaton has 7418 states and 9227 transitions. Word has length 151 [2020-12-22 01:48:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:48:59,621 INFO L481 AbstractCegarLoop]: Abstraction has 7418 states and 9227 transitions. [2020-12-22 01:48:59,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:48:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7418 states and 9227 transitions. [2020-12-22 01:48:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 01:48:59,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:48:59,625 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, 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] [2020-12-22 01:48:59,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:48:59,625 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:48:59,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:48:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1720355189, now seen corresponding path program 1 times [2020-12-22 01:48:59,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:48:59,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92690843] [2020-12-22 01:48:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:48:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:48:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:48:59,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92690843] [2020-12-22 01:48:59,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:48:59,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:48:59,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650425720] [2020-12-22 01:48:59,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:48:59,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:48:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:48:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:48:59,988 INFO L87 Difference]: Start difference. First operand 7418 states and 9227 transitions. Second operand 3 states. [2020-12-22 01:49:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:49:09,582 INFO L93 Difference]: Finished difference Result 17212 states and 22196 transitions. [2020-12-22 01:49:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:49:09,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-12-22 01:49:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:49:09,635 INFO L225 Difference]: With dead ends: 17212 [2020-12-22 01:49:09,635 INFO L226 Difference]: Without dead ends: 10583 [2020-12-22 01:49:09,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:49:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10583 states. [2020-12-22 01:49:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10583 to 10574. [2020-12-22 01:49:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10574 states. [2020-12-22 01:49:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10574 states to 10574 states and 12983 transitions. [2020-12-22 01:49:09,907 INFO L78 Accepts]: Start accepts. Automaton has 10574 states and 12983 transitions. Word has length 158 [2020-12-22 01:49:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:49:09,909 INFO L481 AbstractCegarLoop]: Abstraction has 10574 states and 12983 transitions. [2020-12-22 01:49:09,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:49:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 10574 states and 12983 transitions. [2020-12-22 01:49:09,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-22 01:49:09,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:49:09,915 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:49:09,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:49:09,916 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:49:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:49:09,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1719299189, now seen corresponding path program 1 times [2020-12-22 01:49:09,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:49:09,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735424409] [2020-12-22 01:49:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:49:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:49:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-22 01:49:10,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735424409] [2020-12-22 01:49:10,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760995815] [2020-12-22 01:49:10,460 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 01:49:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:49:10,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:49:10,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:49:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2020-12-22 01:49:11,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:49:11,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 01:49:11,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096250796] [2020-12-22 01:49:11,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:49:11,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:49:11,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:49:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:49:11,635 INFO L87 Difference]: Start difference. First operand 10574 states and 12983 transitions. Second operand 3 states. [2020-12-22 01:49:22,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:49:22,509 INFO L93 Difference]: Finished difference Result 29942 states and 37106 transitions. [2020-12-22 01:49:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:49:22,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 247 [2020-12-22 01:49:22,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:49:22,586 INFO L225 Difference]: With dead ends: 29942 [2020-12-22 01:49:22,586 INFO L226 Difference]: Without dead ends: 20157 [2020-12-22 01:49:22,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:49:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20157 states. [2020-12-22 01:49:22,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20157 to 20140. [2020-12-22 01:49:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20140 states. [2020-12-22 01:49:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20140 states to 20140 states and 23963 transitions. [2020-12-22 01:49:23,008 INFO L78 Accepts]: Start accepts. Automaton has 20140 states and 23963 transitions. Word has length 247 [2020-12-22 01:49:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:49:23,014 INFO L481 AbstractCegarLoop]: Abstraction has 20140 states and 23963 transitions. [2020-12-22 01:49:23,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:49:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 20140 states and 23963 transitions. [2020-12-22 01:49:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-22 01:49:23,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:49:23,022 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:23,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 01:49:23,239 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:49:23,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:49:23,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1635386379, now seen corresponding path program 1 times [2020-12-22 01:49:23,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:49:23,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705441992] [2020-12-22 01:49:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:49:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:49:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:49:23,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705441992] [2020-12-22 01:49:23,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:49:23,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:49:23,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219400947] [2020-12-22 01:49:23,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:49:23,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:49:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:49:23,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:49:23,525 INFO L87 Difference]: Start difference. First operand 20140 states and 23963 transitions. Second operand 3 states. [2020-12-22 01:49:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:49:34,661 INFO L93 Difference]: Finished difference Result 39361 states and 46953 transitions. [2020-12-22 01:49:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:49:34,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 276 [2020-12-22 01:49:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:49:34,741 INFO L225 Difference]: With dead ends: 39361 [2020-12-22 01:49:34,741 INFO L226 Difference]: Without dead ends: 20010 [2020-12-22 01:49:34,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:49:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20010 states. [2020-12-22 01:49:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20010 to 19220. [2020-12-22 01:49:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19220 states. [2020-12-22 01:49:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19220 states to 19220 states and 21759 transitions. [2020-12-22 01:49:35,231 INFO L78 Accepts]: Start accepts. Automaton has 19220 states and 21759 transitions. Word has length 276 [2020-12-22 01:49:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:49:35,233 INFO L481 AbstractCegarLoop]: Abstraction has 19220 states and 21759 transitions. [2020-12-22 01:49:35,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:49:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19220 states and 21759 transitions. [2020-12-22 01:49:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-12-22 01:49:35,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:49:35,247 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:49:35,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:49:35,247 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:49:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:49:35,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1187004232, now seen corresponding path program 1 times [2020-12-22 01:49:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:49:35,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258135207] [2020-12-22 01:49:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:49:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:49:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:49:35,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258135207] [2020-12-22 01:49:35,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:49:35,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:49:35,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640957676] [2020-12-22 01:49:35,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:49:35,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:49:35,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:49:35,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:49:35,698 INFO L87 Difference]: Start difference. First operand 19220 states and 21759 transitions. Second operand 3 states. [2020-12-22 01:49:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:49:48,229 INFO L93 Difference]: Finished difference Result 43955 states and 50452 transitions. [2020-12-22 01:49:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:49:48,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2020-12-22 01:49:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:49:48,280 INFO L225 Difference]: With dead ends: 43955 [2020-12-22 01:49:48,280 INFO L226 Difference]: Without dead ends: 25524 [2020-12-22 01:49:48,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:49:48,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25524 states. [2020-12-22 01:49:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25524 to 24733. [2020-12-22 01:49:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24733 states. [2020-12-22 01:49:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24733 states to 24733 states and 27665 transitions. [2020-12-22 01:49:48,778 INFO L78 Accepts]: Start accepts. Automaton has 24733 states and 27665 transitions. Word has length 350 [2020-12-22 01:49:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:49:48,780 INFO L481 AbstractCegarLoop]: Abstraction has 24733 states and 27665 transitions. [2020-12-22 01:49:48,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:49:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 24733 states and 27665 transitions. [2020-12-22 01:49:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-12-22 01:49:48,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:49:48,794 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:49:48,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:49:48,795 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:49:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:49:48,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1602599278, now seen corresponding path program 1 times [2020-12-22 01:49:48,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:49:48,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668486048] [2020-12-22 01:49:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:49:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:49:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 01:49:49,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668486048] [2020-12-22 01:49:49,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:49:49,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:49:49,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970914776] [2020-12-22 01:49:49,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:49:49,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:49:49,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:49:49,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:49:49,182 INFO L87 Difference]: Start difference. First operand 24733 states and 27665 transitions. Second operand 4 states. [2020-12-22 01:50:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:50:17,812 INFO L93 Difference]: Finished difference Result 91376 states and 102287 transitions. [2020-12-22 01:50:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:50:17,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 359 [2020-12-22 01:50:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:50:17,905 INFO L225 Difference]: With dead ends: 91376 [2020-12-22 01:50:17,905 INFO L226 Difference]: Without dead ends: 67432 [2020-12-22 01:50:17,925 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 01:50:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67432 states. [2020-12-22 01:50:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67432 to 64949. [2020-12-22 01:50:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64949 states. [2020-12-22 01:50:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64949 states to 64949 states and 71739 transitions. [2020-12-22 01:50:18,906 INFO L78 Accepts]: Start accepts. Automaton has 64949 states and 71739 transitions. Word has length 359 [2020-12-22 01:50:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:50:18,906 INFO L481 AbstractCegarLoop]: Abstraction has 64949 states and 71739 transitions. [2020-12-22 01:50:18,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:50:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 64949 states and 71739 transitions. [2020-12-22 01:50:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-12-22 01:50:18,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:18,917 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, 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, 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] [2020-12-22 01:50:18,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:50:18,918 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:18,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1513951045, now seen corresponding path program 1 times [2020-12-22 01:50:18,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:18,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575470840] [2020-12-22 01:50:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 288 proven. 25 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-12-22 01:50:20,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575470840] [2020-12-22 01:50:20,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461087825] [2020-12-22 01:50:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:50:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:20,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:50:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:50:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 01:50:21,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:50:21,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-22 01:50:21,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222519352] [2020-12-22 01:50:21,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:50:21,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:50:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:50:21,202 INFO L87 Difference]: Start difference. First operand 64949 states and 71739 transitions. Second operand 3 states. [2020-12-22 01:50:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:50:34,423 INFO L93 Difference]: Finished difference Result 173179 states and 192147 transitions. [2020-12-22 01:50:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:50:34,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 359 [2020-12-22 01:50:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:50:34,561 INFO L225 Difference]: With dead ends: 173179 [2020-12-22 01:50:34,561 INFO L226 Difference]: Without dead ends: 101929 [2020-12-22 01:50:34,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:50:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101929 states. [2020-12-22 01:50:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101929 to 94838. [2020-12-22 01:50:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94838 states. [2020-12-22 01:50:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94838 states to 94838 states and 102734 transitions. [2020-12-22 01:50:36,609 INFO L78 Accepts]: Start accepts. Automaton has 94838 states and 102734 transitions. Word has length 359 [2020-12-22 01:50:36,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:50:36,610 INFO L481 AbstractCegarLoop]: Abstraction has 94838 states and 102734 transitions. [2020-12-22 01:50:36,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:50:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 94838 states and 102734 transitions. [2020-12-22 01:50:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-12-22 01:50:36,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:36,631 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, 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, 2, 2, 2, 2, 2, 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] [2020-12-22 01:50:36,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 01:50:36,842 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:36,843 INFO L82 PathProgramCache]: Analyzing trace with hash 558961745, now seen corresponding path program 1 times [2020-12-22 01:50:36,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:36,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682914392] [2020-12-22 01:50:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 01:50:37,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682914392] [2020-12-22 01:50:37,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:50:37,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:50:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469962958] [2020-12-22 01:50:37,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:50:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:50:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:50:37,349 INFO L87 Difference]: Start difference. First operand 94838 states and 102734 transitions. Second operand 4 states. [2020-12-22 01:50:52,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:50:52,831 INFO L93 Difference]: Finished difference Result 199119 states and 215318 transitions. [2020-12-22 01:50:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:50:52,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 388 [2020-12-22 01:50:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:50:53,017 INFO L225 Difference]: With dead ends: 199119 [2020-12-22 01:50:53,017 INFO L226 Difference]: Without dead ends: 103492 [2020-12-22 01:50:53,091 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 01:50:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103492 states. [2020-12-22 01:50:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103492 to 101130. [2020-12-22 01:50:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101130 states. [2020-12-22 01:50:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101130 states to 101130 states and 108541 transitions. [2020-12-22 01:50:55,009 INFO L78 Accepts]: Start accepts. Automaton has 101130 states and 108541 transitions. Word has length 388 [2020-12-22 01:50:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:50:55,009 INFO L481 AbstractCegarLoop]: Abstraction has 101130 states and 108541 transitions. [2020-12-22 01:50:55,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:50:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 101130 states and 108541 transitions. [2020-12-22 01:50:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-12-22 01:50:55,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:50:55,025 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:50:55,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:50:55,025 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:50:55,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:50:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1975458609, now seen corresponding path program 1 times [2020-12-22 01:50:55,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:50:55,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123899758] [2020-12-22 01:50:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:50:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:50:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 568 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-12-22 01:50:55,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123899758] [2020-12-22 01:50:55,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:50:55,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:50:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120994344] [2020-12-22 01:50:55,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:50:55,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:50:55,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:50:55,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:50:55,816 INFO L87 Difference]: Start difference. First operand 101130 states and 108541 transitions. Second operand 3 states. [2020-12-22 01:51:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:09,779 INFO L93 Difference]: Finished difference Result 224305 states and 242348 transitions. [2020-12-22 01:51:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:09,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 418 [2020-12-22 01:51:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:09,979 INFO L225 Difference]: With dead ends: 224305 [2020-12-22 01:51:09,979 INFO L226 Difference]: Without dead ends: 123964 [2020-12-22 01:51:10,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123964 states. [2020-12-22 01:51:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123964 to 122377. [2020-12-22 01:51:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122377 states. [2020-12-22 01:51:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122377 states to 122377 states and 131753 transitions. [2020-12-22 01:51:12,198 INFO L78 Accepts]: Start accepts. Automaton has 122377 states and 131753 transitions. Word has length 418 [2020-12-22 01:51:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:12,199 INFO L481 AbstractCegarLoop]: Abstraction has 122377 states and 131753 transitions. [2020-12-22 01:51:12,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 122377 states and 131753 transitions. [2020-12-22 01:51:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-12-22 01:51:12,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:12,217 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:51:12,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:51:12,217 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:12,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1681605948, now seen corresponding path program 1 times [2020-12-22 01:51:12,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:12,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121481768] [2020-12-22 01:51:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 647 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-12-22 01:51:13,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121481768] [2020-12-22 01:51:13,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:13,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:13,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592342079] [2020-12-22 01:51:13,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:13,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:13,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:13,035 INFO L87 Difference]: Start difference. First operand 122377 states and 131753 transitions. Second operand 3 states. [2020-12-22 01:51:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:27,426 INFO L93 Difference]: Finished difference Result 244756 states and 263514 transitions. [2020-12-22 01:51:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:27,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 448 [2020-12-22 01:51:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:27,726 INFO L225 Difference]: With dead ends: 244756 [2020-12-22 01:51:27,726 INFO L226 Difference]: Without dead ends: 123168 [2020-12-22 01:51:28,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123168 states. [2020-12-22 01:51:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123168 to 120793. [2020-12-22 01:51:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120793 states. [2020-12-22 01:51:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120793 states to 120793 states and 127998 transitions. [2020-12-22 01:51:30,440 INFO L78 Accepts]: Start accepts. Automaton has 120793 states and 127998 transitions. Word has length 448 [2020-12-22 01:51:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:30,441 INFO L481 AbstractCegarLoop]: Abstraction has 120793 states and 127998 transitions. [2020-12-22 01:51:30,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 120793 states and 127998 transitions. [2020-12-22 01:51:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-12-22 01:51:30,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:30,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2020-12-22 01:51:30,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:51:30,452 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash -684842412, now seen corresponding path program 1 times [2020-12-22 01:51:30,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:30,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131531739] [2020-12-22 01:51:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:51:31,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131531739] [2020-12-22 01:51:31,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:31,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:31,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414955856] [2020-12-22 01:51:31,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:31,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:31,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:31,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:31,368 INFO L87 Difference]: Start difference. First operand 120793 states and 127998 transitions. Second operand 3 states. [2020-12-22 01:51:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:51:45,878 INFO L93 Difference]: Finished difference Result 241600 states and 256016 transitions. [2020-12-22 01:51:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:51:45,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 456 [2020-12-22 01:51:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:51:46,077 INFO L225 Difference]: With dead ends: 241600 [2020-12-22 01:51:46,078 INFO L226 Difference]: Without dead ends: 120808 [2020-12-22 01:51:46,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120808 states. [2020-12-22 01:51:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120808 to 118430. [2020-12-22 01:51:47,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118430 states. [2020-12-22 01:51:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118430 states to 118430 states and 123887 transitions. [2020-12-22 01:51:47,977 INFO L78 Accepts]: Start accepts. Automaton has 118430 states and 123887 transitions. Word has length 456 [2020-12-22 01:51:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:51:47,978 INFO L481 AbstractCegarLoop]: Abstraction has 118430 states and 123887 transitions. [2020-12-22 01:51:47,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:51:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 118430 states and 123887 transitions. [2020-12-22 01:51:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-12-22 01:51:47,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:51:47,985 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:47,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 01:51:47,985 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:51:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:51:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1115352886, now seen corresponding path program 1 times [2020-12-22 01:51:47,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:51:47,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686435015] [2020-12-22 01:51:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:51:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:51:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-12-22 01:51:48,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686435015] [2020-12-22 01:51:48,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:51:48,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:51:48,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113764832] [2020-12-22 01:51:48,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:51:48,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:51:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:51:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:51:48,900 INFO L87 Difference]: Start difference. First operand 118430 states and 123887 transitions. Second operand 3 states.