/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:30:00,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:30:00,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:30:00,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:30:00,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:30:00,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:30:00,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:30:00,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:30:00,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:30:00,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:30:00,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:30:00,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:30:00,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:30:00,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:30:00,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:30:00,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:30:00,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:30:01,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:30:01,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:30:01,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:30:01,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:30:01,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:30:01,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:30:01,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:30:01,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:30:01,050 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:30:01,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:30:01,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:30:01,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:30:01,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:30:01,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:30:01,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:30:01,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:30:01,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:30:01,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:30:01,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:30:01,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:30:01,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:30:01,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:30:01,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:30:01,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:30:01,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:30:01,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:30:01,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:30:01,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:30:01,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:30:01,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:30:01,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:30:01,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:30:01,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:30:01,497 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:30:01,498 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:30:01,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:30:01,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc5af517/46b1b906aabe4835a35fe73b71f139a6/FLAG4bfdbfc47 [2020-12-22 07:30:02,304 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:30:02,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:30:02,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc5af517/46b1b906aabe4835a35fe73b71f139a6/FLAG4bfdbfc47 [2020-12-22 07:30:02,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc5af517/46b1b906aabe4835a35fe73b71f139a6 [2020-12-22 07:30:02,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:30:02,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:30:02,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:30:02,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:30:02,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:30:02,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:30:02" (1/1) ... [2020-12-22 07:30:02,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a24f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:02, skipping insertion in model container [2020-12-22 07:30:02,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:30:02" (1/1) ... [2020-12-22 07:30:02,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:30:02,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:30:02,980 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c[12779,12792] [2020-12-22 07:30:02,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:30:03,013 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:30:03,129 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c[12779,12792] [2020-12-22 07:30:03,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:30:03,159 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:30:03,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03 WrapperNode [2020-12-22 07:30:03,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:30:03,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:30:03,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:30:03,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:30:03,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:30:03,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:30:03,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:30:03,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:30:03,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... [2020-12-22 07:30:03,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:30:03,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:30:03,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:30:03,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:30:03,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:30:03,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:30:03,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:30:03,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:30:03,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:30:04,235 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:30:04,236 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2020-12-22 07:30:04,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:30:04 BoogieIcfgContainer [2020-12-22 07:30:04,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:30:04,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:30:04,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:30:04,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:30:04,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:30:02" (1/3) ... [2020-12-22 07:30:04,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d634813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:30:04, skipping insertion in model container [2020-12-22 07:30:04,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:30:03" (2/3) ... [2020-12-22 07:30:04,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d634813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:30:04, skipping insertion in model container [2020-12-22 07:30:04,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:30:04" (3/3) ... [2020-12-22 07:30:04,252 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c [2020-12-22 07:30:04,260 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:30:04,268 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:30:04,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:30:04,324 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:30:04,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:30:04,325 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:30:04,325 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:30:04,325 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:30:04,326 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:30:04,326 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:30:04,326 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:30:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-12-22 07:30:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 07:30:04,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:04,404 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] [2020-12-22 07:30:04,405 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1522683097, now seen corresponding path program 1 times [2020-12-22 07:30:04,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:04,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509677482] [2020-12-22 07:30:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:04,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509677482] [2020-12-22 07:30:04,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:04,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:30:04,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844689980] [2020-12-22 07:30:04,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:30:04,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:04,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:30:04,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:30:04,785 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 2 states. [2020-12-22 07:30:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:04,821 INFO L93 Difference]: Finished difference Result 205 states and 341 transitions. [2020-12-22 07:30:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:30:04,822 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 07:30:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:04,835 INFO L225 Difference]: With dead ends: 205 [2020-12-22 07:30:04,836 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 07:30:04,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:30:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 07:30:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-12-22 07:30:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 07:30:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 200 transitions. [2020-12-22 07:30:04,892 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 200 transitions. Word has length 34 [2020-12-22 07:30:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:04,893 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 200 transitions. [2020-12-22 07:30:04,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:30:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 200 transitions. [2020-12-22 07:30:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 07:30:04,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:04,896 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] [2020-12-22 07:30:04,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:30:04,896 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -136479703, now seen corresponding path program 1 times [2020-12-22 07:30:04,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:04,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272101075] [2020-12-22 07:30:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:05,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272101075] [2020-12-22 07:30:05,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:05,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:30:05,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403632878] [2020-12-22 07:30:05,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:30:05,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:30:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:30:05,061 INFO L87 Difference]: Start difference. First operand 119 states and 200 transitions. Second operand 5 states. [2020-12-22 07:30:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:05,192 INFO L93 Difference]: Finished difference Result 204 states and 334 transitions. [2020-12-22 07:30:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:30:05,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 07:30:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:05,196 INFO L225 Difference]: With dead ends: 204 [2020-12-22 07:30:05,196 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 07:30:05,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:05,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 07:30:05,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-12-22 07:30:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 07:30:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2020-12-22 07:30:05,211 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 34 [2020-12-22 07:30:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:05,211 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2020-12-22 07:30:05,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:30:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2020-12-22 07:30:05,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:30:05,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:05,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:05,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:30:05,215 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash 958823668, now seen corresponding path program 1 times [2020-12-22 07:30:05,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:05,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2167147] [2020-12-22 07:30:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:05,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2167147] [2020-12-22 07:30:05,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:05,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:05,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137698250] [2020-12-22 07:30:05,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:05,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:05,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:05,388 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand 3 states. [2020-12-22 07:30:05,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:05,434 INFO L93 Difference]: Finished difference Result 269 states and 408 transitions. [2020-12-22 07:30:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:05,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:30:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:05,437 INFO L225 Difference]: With dead ends: 269 [2020-12-22 07:30:05,438 INFO L226 Difference]: Without dead ends: 188 [2020-12-22 07:30:05,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-22 07:30:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-12-22 07:30:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-22 07:30:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 276 transitions. [2020-12-22 07:30:05,460 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 276 transitions. Word has length 65 [2020-12-22 07:30:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:05,460 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 276 transitions. [2020-12-22 07:30:05,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 276 transitions. [2020-12-22 07:30:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:30:05,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:05,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:05,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:30:05,464 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:05,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1904004827, now seen corresponding path program 1 times [2020-12-22 07:30:05,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:05,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405219235] [2020-12-22 07:30:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:05,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405219235] [2020-12-22 07:30:05,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:05,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:05,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37273321] [2020-12-22 07:30:05,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:05,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:05,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:05,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:05,600 INFO L87 Difference]: Start difference. First operand 186 states and 276 transitions. Second operand 3 states. [2020-12-22 07:30:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:05,638 INFO L93 Difference]: Finished difference Result 458 states and 712 transitions. [2020-12-22 07:30:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:05,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:30:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:05,643 INFO L225 Difference]: With dead ends: 458 [2020-12-22 07:30:05,643 INFO L226 Difference]: Without dead ends: 310 [2020-12-22 07:30:05,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-22 07:30:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2020-12-22 07:30:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-12-22 07:30:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 471 transitions. [2020-12-22 07:30:05,720 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 471 transitions. Word has length 66 [2020-12-22 07:30:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:05,724 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 471 transitions. [2020-12-22 07:30:05,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:05,725 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 471 transitions. [2020-12-22 07:30:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:30:05,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:05,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:05,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:30:05,729 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1896694372, now seen corresponding path program 1 times [2020-12-22 07:30:05,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:05,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531346389] [2020-12-22 07:30:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:05,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531346389] [2020-12-22 07:30:05,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:05,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:05,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945352826] [2020-12-22 07:30:05,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:05,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:05,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:05,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:05,872 INFO L87 Difference]: Start difference. First operand 308 states and 471 transitions. Second operand 3 states. [2020-12-22 07:30:05,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:05,914 INFO L93 Difference]: Finished difference Result 800 states and 1257 transitions. [2020-12-22 07:30:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:05,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:30:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:05,920 INFO L225 Difference]: With dead ends: 800 [2020-12-22 07:30:05,920 INFO L226 Difference]: Without dead ends: 530 [2020-12-22 07:30:05,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-12-22 07:30:05,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 528. [2020-12-22 07:30:05,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 528 states. [2020-12-22 07:30:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 819 transitions. [2020-12-22 07:30:05,963 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 819 transitions. Word has length 67 [2020-12-22 07:30:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:05,964 INFO L481 AbstractCegarLoop]: Abstraction has 528 states and 819 transitions. [2020-12-22 07:30:05,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 819 transitions. [2020-12-22 07:30:05,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:30:05,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:05,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:05,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:30:05,967 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1528655733, now seen corresponding path program 1 times [2020-12-22 07:30:05,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:05,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785782419] [2020-12-22 07:30:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:06,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785782419] [2020-12-22 07:30:06,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:06,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:06,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159652606] [2020-12-22 07:30:06,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:06,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:06,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:06,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:06,054 INFO L87 Difference]: Start difference. First operand 528 states and 819 transitions. Second operand 3 states. [2020-12-22 07:30:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:06,109 INFO L93 Difference]: Finished difference Result 1412 states and 2221 transitions. [2020-12-22 07:30:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:06,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:30:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:06,116 INFO L225 Difference]: With dead ends: 1412 [2020-12-22 07:30:06,117 INFO L226 Difference]: Without dead ends: 922 [2020-12-22 07:30:06,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2020-12-22 07:30:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 920. [2020-12-22 07:30:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 920 states. [2020-12-22 07:30:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1431 transitions. [2020-12-22 07:30:06,172 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1431 transitions. Word has length 68 [2020-12-22 07:30:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:06,176 INFO L481 AbstractCegarLoop]: Abstraction has 920 states and 1431 transitions. [2020-12-22 07:30:06,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1431 transitions. [2020-12-22 07:30:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:30:06,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:06,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:06,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:30:06,181 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:06,187 INFO L82 PathProgramCache]: Analyzing trace with hash -571662380, now seen corresponding path program 1 times [2020-12-22 07:30:06,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:06,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923667429] [2020-12-22 07:30:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:06,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923667429] [2020-12-22 07:30:06,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:06,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:30:06,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072534745] [2020-12-22 07:30:06,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:30:06,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:06,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:30:06,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:06,460 INFO L87 Difference]: Start difference. First operand 920 states and 1431 transitions. Second operand 7 states. [2020-12-22 07:30:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:06,787 INFO L93 Difference]: Finished difference Result 4866 states and 7596 transitions. [2020-12-22 07:30:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:30:06,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-12-22 07:30:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:06,814 INFO L225 Difference]: With dead ends: 4866 [2020-12-22 07:30:06,814 INFO L226 Difference]: Without dead ends: 3984 [2020-12-22 07:30:06,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2020-12-22 07:30:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3976. [2020-12-22 07:30:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3976 states. [2020-12-22 07:30:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 6183 transitions. [2020-12-22 07:30:07,009 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 6183 transitions. Word has length 69 [2020-12-22 07:30:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:07,010 INFO L481 AbstractCegarLoop]: Abstraction has 3976 states and 6183 transitions. [2020-12-22 07:30:07,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:30:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 6183 transitions. [2020-12-22 07:30:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:30:07,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:07,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:07,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:30:07,013 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:07,014 INFO L82 PathProgramCache]: Analyzing trace with hash -238588952, now seen corresponding path program 1 times [2020-12-22 07:30:07,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:07,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659181672] [2020-12-22 07:30:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:07,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659181672] [2020-12-22 07:30:07,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:07,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:07,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162883355] [2020-12-22 07:30:07,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:07,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:07,094 INFO L87 Difference]: Start difference. First operand 3976 states and 6183 transitions. Second operand 3 states. [2020-12-22 07:30:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:07,402 INFO L93 Difference]: Finished difference Result 10780 states and 16713 transitions. [2020-12-22 07:30:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:07,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:30:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:07,439 INFO L225 Difference]: With dead ends: 10780 [2020-12-22 07:30:07,439 INFO L226 Difference]: Without dead ends: 6842 [2020-12-22 07:30:07,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2020-12-22 07:30:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 6840. [2020-12-22 07:30:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6840 states. [2020-12-22 07:30:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 10487 transitions. [2020-12-22 07:30:07,819 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 10487 transitions. Word has length 70 [2020-12-22 07:30:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:07,820 INFO L481 AbstractCegarLoop]: Abstraction has 6840 states and 10487 transitions. [2020-12-22 07:30:07,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 10487 transitions. [2020-12-22 07:30:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:30:07,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:07,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:07,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:30:07,825 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:07,826 INFO L82 PathProgramCache]: Analyzing trace with hash -965246768, now seen corresponding path program 1 times [2020-12-22 07:30:07,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:07,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295602365] [2020-12-22 07:30:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:08,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295602365] [2020-12-22 07:30:08,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:08,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:30:08,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463349444] [2020-12-22 07:30:08,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:30:08,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:30:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:30:08,022 INFO L87 Difference]: Start difference. First operand 6840 states and 10487 transitions. Second operand 7 states. [2020-12-22 07:30:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:09,271 INFO L93 Difference]: Finished difference Result 34692 states and 53341 transitions. [2020-12-22 07:30:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:30:09,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-12-22 07:30:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:09,395 INFO L225 Difference]: With dead ends: 34692 [2020-12-22 07:30:09,396 INFO L226 Difference]: Without dead ends: 27890 [2020-12-22 07:30:09,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:30:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27890 states. [2020-12-22 07:30:10,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27890 to 13640. [2020-12-22 07:30:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13640 states. [2020-12-22 07:30:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13640 states to 13640 states and 20615 transitions. [2020-12-22 07:30:10,429 INFO L78 Accepts]: Start accepts. Automaton has 13640 states and 20615 transitions. Word has length 70 [2020-12-22 07:30:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:10,429 INFO L481 AbstractCegarLoop]: Abstraction has 13640 states and 20615 transitions. [2020-12-22 07:30:10,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:30:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 13640 states and 20615 transitions. [2020-12-22 07:30:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:30:10,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:10,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:10,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:30:10,436 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:10,437 INFO L82 PathProgramCache]: Analyzing trace with hash -241201943, now seen corresponding path program 1 times [2020-12-22 07:30:10,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:10,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499200202] [2020-12-22 07:30:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:10,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499200202] [2020-12-22 07:30:10,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:10,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:30:10,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338476230] [2020-12-22 07:30:10,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:30:10,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:10,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:30:10,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:30:10,609 INFO L87 Difference]: Start difference. First operand 13640 states and 20615 transitions. Second operand 8 states. [2020-12-22 07:30:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:12,288 INFO L93 Difference]: Finished difference Result 28522 states and 42472 transitions. [2020-12-22 07:30:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:30:12,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-12-22 07:30:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:12,358 INFO L225 Difference]: With dead ends: 28522 [2020-12-22 07:30:12,358 INFO L226 Difference]: Without dead ends: 28520 [2020-12-22 07:30:12,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:30:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28520 states. [2020-12-22 07:30:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28520 to 14600. [2020-12-22 07:30:13,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-12-22 07:30:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 21575 transitions. [2020-12-22 07:30:13,424 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 21575 transitions. Word has length 71 [2020-12-22 07:30:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:13,425 INFO L481 AbstractCegarLoop]: Abstraction has 14600 states and 21575 transitions. [2020-12-22 07:30:13,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:30:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 21575 transitions. [2020-12-22 07:30:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:30:13,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:13,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:30:13,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:30:13,427 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:13,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1165253064, now seen corresponding path program 1 times [2020-12-22 07:30:13,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:13,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542514528] [2020-12-22 07:30:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:13,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542514528] [2020-12-22 07:30:13,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:13,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:13,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347310184] [2020-12-22 07:30:13,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:13,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:13,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:13,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:13,512 INFO L87 Difference]: Start difference. First operand 14600 states and 21575 transitions. Second operand 3 states. [2020-12-22 07:30:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:14,687 INFO L93 Difference]: Finished difference Result 35662 states and 52763 transitions. [2020-12-22 07:30:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:14,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 07:30:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:14,729 INFO L225 Difference]: With dead ends: 35662 [2020-12-22 07:30:14,729 INFO L226 Difference]: Without dead ends: 21100 [2020-12-22 07:30:14,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21100 states. [2020-12-22 07:30:16,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21100 to 20954. [2020-12-22 07:30:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20954 states. [2020-12-22 07:30:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20954 states to 20954 states and 30793 transitions. [2020-12-22 07:30:16,118 INFO L78 Accepts]: Start accepts. Automaton has 20954 states and 30793 transitions. Word has length 72 [2020-12-22 07:30:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:16,118 INFO L481 AbstractCegarLoop]: Abstraction has 20954 states and 30793 transitions. [2020-12-22 07:30:16,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 20954 states and 30793 transitions. [2020-12-22 07:30:16,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:30:16,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:16,139 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:30:16,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:30:16,139 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:16,140 INFO L82 PathProgramCache]: Analyzing trace with hash -396516070, now seen corresponding path program 1 times [2020-12-22 07:30:16,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:16,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720337458] [2020-12-22 07:30:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:16,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720337458] [2020-12-22 07:30:16,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136431807] [2020-12-22 07:30:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:30:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:16,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:30:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:30:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:30:17,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:30:17,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:30:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103123013] [2020-12-22 07:30:17,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:30:17,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:17,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:30:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:30:17,047 INFO L87 Difference]: Start difference. First operand 20954 states and 30793 transitions. Second operand 12 states. [2020-12-22 07:30:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:28,248 INFO L93 Difference]: Finished difference Result 164018 states and 239259 transitions. [2020-12-22 07:30:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 07:30:28,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-12-22 07:30:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:28,543 INFO L225 Difference]: With dead ends: 164018 [2020-12-22 07:30:28,543 INFO L226 Difference]: Without dead ends: 143696 [2020-12-22 07:30:28,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=797, Invalid=3109, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 07:30:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143696 states. [2020-12-22 07:30:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143696 to 80658. [2020-12-22 07:30:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80658 states. [2020-12-22 07:30:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80658 states to 80658 states and 117317 transitions. [2020-12-22 07:30:34,385 INFO L78 Accepts]: Start accepts. Automaton has 80658 states and 117317 transitions. Word has length 100 [2020-12-22 07:30:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:34,386 INFO L481 AbstractCegarLoop]: Abstraction has 80658 states and 117317 transitions. [2020-12-22 07:30:34,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:30:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 80658 states and 117317 transitions. [2020-12-22 07:30:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:30:34,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:34,405 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:30:34,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 07:30:34,621 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1964197035, now seen corresponding path program 1 times [2020-12-22 07:30:34,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:34,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423811047] [2020-12-22 07:30:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:30:34,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423811047] [2020-12-22 07:30:34,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:34,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:30:34,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419132601] [2020-12-22 07:30:34,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:30:34,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:30:34,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:34,694 INFO L87 Difference]: Start difference. First operand 80658 states and 117317 transitions. Second operand 3 states. [2020-12-22 07:30:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:40,607 INFO L93 Difference]: Finished difference Result 174118 states and 253419 transitions. [2020-12-22 07:30:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:30:40,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:30:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:40,803 INFO L225 Difference]: With dead ends: 174118 [2020-12-22 07:30:40,804 INFO L226 Difference]: Without dead ends: 121040 [2020-12-22 07:30:40,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:30:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121040 states. [2020-12-22 07:30:47,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121040 to 115634. [2020-12-22 07:30:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115634 states. [2020-12-22 07:30:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115634 states to 115634 states and 166669 transitions. [2020-12-22 07:30:47,439 INFO L78 Accepts]: Start accepts. Automaton has 115634 states and 166669 transitions. Word has length 100 [2020-12-22 07:30:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:30:47,439 INFO L481 AbstractCegarLoop]: Abstraction has 115634 states and 166669 transitions. [2020-12-22 07:30:47,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:30:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 115634 states and 166669 transitions. [2020-12-22 07:30:47,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:30:47,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:30:47,465 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:30:47,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:30:47,466 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:30:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:30:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1432680103, now seen corresponding path program 1 times [2020-12-22 07:30:47,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:30:47,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217711288] [2020-12-22 07:30:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:30:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:30:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 07:30:47,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217711288] [2020-12-22 07:30:47,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:30:47,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:30:47,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139717730] [2020-12-22 07:30:47,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:30:47,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:30:47,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:30:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:30:47,570 INFO L87 Difference]: Start difference. First operand 115634 states and 166669 transitions. Second operand 6 states. [2020-12-22 07:30:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:30:56,535 INFO L93 Difference]: Finished difference Result 294463 states and 424938 transitions. [2020-12-22 07:30:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:30:56,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2020-12-22 07:30:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:30:56,964 INFO L225 Difference]: With dead ends: 294463 [2020-12-22 07:30:56,964 INFO L226 Difference]: Without dead ends: 178891 [2020-12-22 07:30:57,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:30:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178891 states. [2020-12-22 07:31:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178891 to 157445. [2020-12-22 07:31:05,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157445 states. [2020-12-22 07:31:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157445 states to 157445 states and 225325 transitions. [2020-12-22 07:31:06,156 INFO L78 Accepts]: Start accepts. Automaton has 157445 states and 225325 transitions. Word has length 100 [2020-12-22 07:31:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:06,156 INFO L481 AbstractCegarLoop]: Abstraction has 157445 states and 225325 transitions. [2020-12-22 07:31:06,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:31:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 157445 states and 225325 transitions. [2020-12-22 07:31:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:31:06,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:06,197 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:31:06,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:31:06,198 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:06,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:06,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1928312001, now seen corresponding path program 1 times [2020-12-22 07:31:06,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:06,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126138271] [2020-12-22 07:31:06,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:06,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126138271] [2020-12-22 07:31:06,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:06,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:06,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417242670] [2020-12-22 07:31:06,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:06,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:06,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:06,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:06,269 INFO L87 Difference]: Start difference. First operand 157445 states and 225325 transitions. Second operand 3 states. [2020-12-22 07:31:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:17,140 INFO L93 Difference]: Finished difference Result 357097 states and 510643 transitions. [2020-12-22 07:31:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:17,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:31:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:17,501 INFO L225 Difference]: With dead ends: 357097 [2020-12-22 07:31:17,501 INFO L226 Difference]: Without dead ends: 211267 [2020-12-22 07:31:17,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211267 states. [2020-12-22 07:31:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211267 to 173625. [2020-12-22 07:31:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173625 states. [2020-12-22 07:31:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173625 states to 173625 states and 245981 transitions. [2020-12-22 07:31:27,835 INFO L78 Accepts]: Start accepts. Automaton has 173625 states and 245981 transitions. Word has length 100 [2020-12-22 07:31:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:27,835 INFO L481 AbstractCegarLoop]: Abstraction has 173625 states and 245981 transitions. [2020-12-22 07:31:27,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 173625 states and 245981 transitions. [2020-12-22 07:31:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:31:27,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:27,861 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:31:27,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:31:27,861 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1906240849, now seen corresponding path program 1 times [2020-12-22 07:31:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:27,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41094955] [2020-12-22 07:31:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:31:28,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41094955] [2020-12-22 07:31:28,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:28,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:31:28,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817171274] [2020-12-22 07:31:28,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:31:28,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:31:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:28,345 INFO L87 Difference]: Start difference. First operand 173625 states and 245981 transitions. Second operand 7 states. [2020-12-22 07:31:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:48,296 INFO L93 Difference]: Finished difference Result 467877 states and 667459 transitions. [2020-12-22 07:31:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:31:48,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-12-22 07:31:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:49,221 INFO L225 Difference]: With dead ends: 467877 [2020-12-22 07:31:49,221 INFO L226 Difference]: Without dead ends: 394915 [2020-12-22 07:31:49,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:31:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394915 states. [2020-12-22 07:32:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394915 to 243705. [2020-12-22 07:32:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243705 states. [2020-12-22 07:32:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243705 states to 243705 states and 345161 transitions. [2020-12-22 07:32:05,141 INFO L78 Accepts]: Start accepts. Automaton has 243705 states and 345161 transitions. Word has length 100 [2020-12-22 07:32:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:05,142 INFO L481 AbstractCegarLoop]: Abstraction has 243705 states and 345161 transitions. [2020-12-22 07:32:05,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:32:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 243705 states and 345161 transitions. [2020-12-22 07:32:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:32:05,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:05,167 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:05,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:32:05,168 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:05,168 INFO L82 PathProgramCache]: Analyzing trace with hash 425782753, now seen corresponding path program 1 times [2020-12-22 07:32:05,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:05,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980145604] [2020-12-22 07:32:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:05,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980145604] [2020-12-22 07:32:05,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:05,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:05,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273786544] [2020-12-22 07:32:05,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:05,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:05,229 INFO L87 Difference]: Start difference. First operand 243705 states and 345161 transitions. Second operand 3 states. [2020-12-22 07:32:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:24,413 INFO L93 Difference]: Finished difference Result 521662 states and 735932 transitions. [2020-12-22 07:32:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:24,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:32:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:25,243 INFO L225 Difference]: With dead ends: 521662 [2020-12-22 07:32:25,243 INFO L226 Difference]: Without dead ends: 350204 [2020-12-22 07:32:25,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350204 states. [2020-12-22 07:32:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350204 to 332970. [2020-12-22 07:32:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332970 states. [2020-12-22 07:32:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332970 states to 332970 states and 465884 transitions. [2020-12-22 07:32:49,066 INFO L78 Accepts]: Start accepts. Automaton has 332970 states and 465884 transitions. Word has length 100 [2020-12-22 07:32:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:49,067 INFO L481 AbstractCegarLoop]: Abstraction has 332970 states and 465884 transitions. [2020-12-22 07:32:49,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 332970 states and 465884 transitions. [2020-12-22 07:32:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:32:49,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:49,111 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:49,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:32:49,112 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:49,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:49,112 INFO L82 PathProgramCache]: Analyzing trace with hash 853128817, now seen corresponding path program 1 times [2020-12-22 07:32:49,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:49,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32064118] [2020-12-22 07:32:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:49,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32064118] [2020-12-22 07:32:49,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:49,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711775107] [2020-12-22 07:32:49,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:49,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:49,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:49,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:49,189 INFO L87 Difference]: Start difference. First operand 332970 states and 465884 transitions. Second operand 3 states. [2020-12-22 07:33:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:11,795 INFO L93 Difference]: Finished difference Result 555969 states and 773345 transitions. [2020-12-22 07:33:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:33:11,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 07:33:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:12,494 INFO L225 Difference]: With dead ends: 555969 [2020-12-22 07:33:12,494 INFO L226 Difference]: Without dead ends: 346109 [2020-12-22 07:33:12,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:33:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346109 states. [2020-12-22 07:33:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346109 to 332500. [2020-12-22 07:33:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332500 states. [2020-12-22 07:33:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332500 states to 332500 states and 458560 transitions. [2020-12-22 07:33:34,132 INFO L78 Accepts]: Start accepts. Automaton has 332500 states and 458560 transitions. Word has length 100 [2020-12-22 07:33:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:34,132 INFO L481 AbstractCegarLoop]: Abstraction has 332500 states and 458560 transitions. [2020-12-22 07:33:34,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:33:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 332500 states and 458560 transitions. [2020-12-22 07:33:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:33:34,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:34,162 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:33:34,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:33:34,162 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash -681189839, now seen corresponding path program 1 times [2020-12-22 07:33:34,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:34,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933886288] [2020-12-22 07:33:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 07:33:34,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933886288] [2020-12-22 07:33:34,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:34,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 07:33:34,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089350249] [2020-12-22 07:33:34,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:33:34,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:34,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:33:34,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:33:34,319 INFO L87 Difference]: Start difference. First operand 332500 states and 458560 transitions. Second operand 7 states.