/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_floodmax.4_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:23:48,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:23:48,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:23:48,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:23:48,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:23:48,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:23:48,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:23:48,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:23:48,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:23:48,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:23:48,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:23:48,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:23:48,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:23:48,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:23:48,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:23:48,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:23:48,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:23:48,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:23:48,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:23:48,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:23:48,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:23:49,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:23:49,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:23:49,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:23:49,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:23:49,046 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:23:49,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:23:49,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:23:49,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:23:49,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:23:49,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:23:49,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:23:49,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:23:49,048 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:23:49,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:23:49,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:23:49,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:23:49,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:23:49,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:23:49,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:23:49,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:23:49,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:23:49,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:23:49,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:23:49,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:23:49,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:23:49,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:23:49,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:23:49,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:23:49,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:23:49,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:23:49,525 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:23:49,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:23:49,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/effdc7d04/c294bfed9f8042b995d1c7cea70d02bf/FLAG70c1b13d9 [2020-12-22 07:23:50,478 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:23:50,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:23:50,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/effdc7d04/c294bfed9f8042b995d1c7cea70d02bf/FLAG70c1b13d9 [2020-12-22 07:23:50,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/effdc7d04/c294bfed9f8042b995d1c7cea70d02bf [2020-12-22 07:23:50,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:23:50,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:23:50,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:23:50,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:23:50,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:23:50,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:23:50" (1/1) ... [2020-12-22 07:23:50,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66cad491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:50, skipping insertion in model container [2020-12-22 07:23:50,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:23:50" (1/1) ... [2020-12-22 07:23:50,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:23:50,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:23:51,218 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_floodmax.4_overflow.ufo.UNBOUNDED.pals.c[28307,28320] [2020-12-22 07:23:51,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:23:51,243 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:23:51,338 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_floodmax.4_overflow.ufo.UNBOUNDED.pals.c[28307,28320] [2020-12-22 07:23:51,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:23:51,367 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:23:51,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51 WrapperNode [2020-12-22 07:23:51,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:23:51,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:23:51,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:23:51,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:23:51,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:23:51,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:23:51,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:23:51,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:23:51,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (1/1) ... [2020-12-22 07:23:51,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:23:51,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:23:51,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:23:51,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:23:51,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (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 07:23:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:23:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:23:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:23:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:23:53,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:23:53,456 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-22 07:23:53,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:23:53 BoogieIcfgContainer [2020-12-22 07:23:53,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:23:53,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:23:53,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:23:53,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:23:53,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:23:50" (1/3) ... [2020-12-22 07:23:53,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7427fb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:23:53, skipping insertion in model container [2020-12-22 07:23:53,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:51" (2/3) ... [2020-12-22 07:23:53,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7427fb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:23:53, skipping insertion in model container [2020-12-22 07:23:53,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:23:53" (3/3) ... [2020-12-22 07:23:53,468 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:23:53,475 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:23:53,482 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:23:53,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:23:53,557 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:23:53,557 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:23:53,557 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:23:53,558 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:23:53,558 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:23:53,558 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:23:53,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:23:53,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:23:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2020-12-22 07:23:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:23:53,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:53,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:53,623 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2110216456, now seen corresponding path program 1 times [2020-12-22 07:23:53,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:53,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919519804] [2020-12-22 07:23:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:54,055 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 07:23:54,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919519804] [2020-12-22 07:23:54,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:54,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:23:54,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370204292] [2020-12-22 07:23:54,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:23:54,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:23:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:23:54,081 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 2 states. [2020-12-22 07:23:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:54,124 INFO L93 Difference]: Finished difference Result 411 states and 733 transitions. [2020-12-22 07:23:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:23:54,126 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 77 [2020-12-22 07:23:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:54,142 INFO L225 Difference]: With dead ends: 411 [2020-12-22 07:23:54,143 INFO L226 Difference]: Without dead ends: 299 [2020-12-22 07:23:54,146 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 07:23:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-22 07:23:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2020-12-22 07:23:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-12-22 07:23:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 538 transitions. [2020-12-22 07:23:54,213 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 538 transitions. Word has length 77 [2020-12-22 07:23:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:54,214 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 538 transitions. [2020-12-22 07:23:54,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:23:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 538 transitions. [2020-12-22 07:23:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:23:54,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:54,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:23:54,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:23:54,219 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2050737334, now seen corresponding path program 1 times [2020-12-22 07:23:54,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:54,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916426710] [2020-12-22 07:23:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:54,520 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 07:23:54,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916426710] [2020-12-22 07:23:54,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:54,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:23:54,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459981601] [2020-12-22 07:23:54,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:23:54,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:54,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:23:54,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:54,527 INFO L87 Difference]: Start difference. First operand 299 states and 538 transitions. Second operand 5 states. [2020-12-22 07:23:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:54,708 INFO L93 Difference]: Finished difference Result 410 states and 726 transitions. [2020-12-22 07:23:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:23:54,709 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-12-22 07:23:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:54,717 INFO L225 Difference]: With dead ends: 410 [2020-12-22 07:23:54,717 INFO L226 Difference]: Without dead ends: 299 [2020-12-22 07:23:54,720 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 07:23:54,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-22 07:23:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2020-12-22 07:23:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-12-22 07:23:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 496 transitions. [2020-12-22 07:23:54,750 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 496 transitions. Word has length 77 [2020-12-22 07:23:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:54,750 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 496 transitions. [2020-12-22 07:23:54,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:23:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 496 transitions. [2020-12-22 07:23:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:23:54,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:54,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:54,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:23:54,762 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:54,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash 255571390, now seen corresponding path program 1 times [2020-12-22 07:23:54,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:54,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719442879] [2020-12-22 07:23:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:55,015 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 07:23:55,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719442879] [2020-12-22 07:23:55,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:55,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:55,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140308632] [2020-12-22 07:23:55,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:55,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:55,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:55,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:55,018 INFO L87 Difference]: Start difference. First operand 299 states and 496 transitions. Second operand 3 states. [2020-12-22 07:23:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:55,082 INFO L93 Difference]: Finished difference Result 502 states and 843 transitions. [2020-12-22 07:23:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:55,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 118 [2020-12-22 07:23:55,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:55,086 INFO L225 Difference]: With dead ends: 502 [2020-12-22 07:23:55,087 INFO L226 Difference]: Without dead ends: 395 [2020-12-22 07:23:55,088 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 07:23:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-22 07:23:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 393. [2020-12-22 07:23:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-12-22 07:23:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 653 transitions. [2020-12-22 07:23:55,105 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 653 transitions. Word has length 118 [2020-12-22 07:23:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:55,108 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 653 transitions. [2020-12-22 07:23:55,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 653 transitions. [2020-12-22 07:23:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:23:55,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:55,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:55,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:23:55,113 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:55,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1923540700, now seen corresponding path program 1 times [2020-12-22 07:23:55,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:55,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695325762] [2020-12-22 07:23:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:55,286 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 07:23:55,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695325762] [2020-12-22 07:23:55,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:55,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851002222] [2020-12-22 07:23:55,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:55,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:55,291 INFO L87 Difference]: Start difference. First operand 393 states and 653 transitions. Second operand 3 states. [2020-12-22 07:23:55,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:55,329 INFO L93 Difference]: Finished difference Result 589 states and 989 transitions. [2020-12-22 07:23:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:55,331 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:23:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:55,338 INFO L225 Difference]: With dead ends: 589 [2020-12-22 07:23:55,338 INFO L226 Difference]: Without dead ends: 482 [2020-12-22 07:23:55,340 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 07:23:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-22 07:23:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 480. [2020-12-22 07:23:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-12-22 07:23:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 802 transitions. [2020-12-22 07:23:55,369 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 802 transitions. Word has length 121 [2020-12-22 07:23:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:55,371 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 802 transitions. [2020-12-22 07:23:55,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 802 transitions. [2020-12-22 07:23:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 07:23:55,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:55,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:55,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:23:55,374 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:55,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1109580608, now seen corresponding path program 1 times [2020-12-22 07:23:55,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:55,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627935036] [2020-12-22 07:23:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:55,569 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 07:23:55,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627935036] [2020-12-22 07:23:55,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:55,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:55,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53921296] [2020-12-22 07:23:55,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:55,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:55,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:55,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:55,574 INFO L87 Difference]: Start difference. First operand 480 states and 802 transitions. Second operand 3 states. [2020-12-22 07:23:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:55,648 INFO L93 Difference]: Finished difference Result 1025 states and 1727 transitions. [2020-12-22 07:23:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:55,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 07:23:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:55,653 INFO L225 Difference]: With dead ends: 1025 [2020-12-22 07:23:55,653 INFO L226 Difference]: Without dead ends: 739 [2020-12-22 07:23:55,656 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 07:23:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-12-22 07:23:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2020-12-22 07:23:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-12-22 07:23:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1235 transitions. [2020-12-22 07:23:55,691 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1235 transitions. Word has length 121 [2020-12-22 07:23:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:55,692 INFO L481 AbstractCegarLoop]: Abstraction has 737 states and 1235 transitions. [2020-12-22 07:23:55,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1235 transitions. [2020-12-22 07:23:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:23:55,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:55,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:55,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:23:55,698 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2073181113, now seen corresponding path program 1 times [2020-12-22 07:23:55,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:55,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868372158] [2020-12-22 07:23:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:55,835 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 07:23:55,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868372158] [2020-12-22 07:23:55,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:55,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:55,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31458097] [2020-12-22 07:23:55,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:55,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:55,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:55,838 INFO L87 Difference]: Start difference. First operand 737 states and 1235 transitions. Second operand 3 states. [2020-12-22 07:23:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:55,894 INFO L93 Difference]: Finished difference Result 1262 states and 2126 transitions. [2020-12-22 07:23:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:55,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:23:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:55,901 INFO L225 Difference]: With dead ends: 1262 [2020-12-22 07:23:55,901 INFO L226 Difference]: Without dead ends: 976 [2020-12-22 07:23:55,902 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 07:23:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2020-12-22 07:23:55,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2020-12-22 07:23:55,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 974 states. [2020-12-22 07:23:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1633 transitions. [2020-12-22 07:23:55,946 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1633 transitions. Word has length 124 [2020-12-22 07:23:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:55,947 INFO L481 AbstractCegarLoop]: Abstraction has 974 states and 1633 transitions. [2020-12-22 07:23:55,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1633 transitions. [2020-12-22 07:23:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:23:55,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:55,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:55,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:23:55,950 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1914082347, now seen corresponding path program 1 times [2020-12-22 07:23:55,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:55,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380502036] [2020-12-22 07:23:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:56,060 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 07:23:56,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380502036] [2020-12-22 07:23:56,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:56,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:56,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761630799] [2020-12-22 07:23:56,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:56,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:56,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:56,064 INFO L87 Difference]: Start difference. First operand 974 states and 1633 transitions. Second operand 3 states. [2020-12-22 07:23:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:56,117 INFO L93 Difference]: Finished difference Result 2427 states and 4080 transitions. [2020-12-22 07:23:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:56,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 07:23:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:56,129 INFO L225 Difference]: With dead ends: 2427 [2020-12-22 07:23:56,129 INFO L226 Difference]: Without dead ends: 1660 [2020-12-22 07:23:56,132 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 07:23:56,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2020-12-22 07:23:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1658. [2020-12-22 07:23:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2020-12-22 07:23:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2770 transitions. [2020-12-22 07:23:56,187 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2770 transitions. Word has length 124 [2020-12-22 07:23:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:56,188 INFO L481 AbstractCegarLoop]: Abstraction has 1658 states and 2770 transitions. [2020-12-22 07:23:56,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2770 transitions. [2020-12-22 07:23:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:23:56,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:56,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:56,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:23:56,191 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:56,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1459354075, now seen corresponding path program 1 times [2020-12-22 07:23:56,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:56,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510635916] [2020-12-22 07:23:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:56,356 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 07:23:56,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510635916] [2020-12-22 07:23:56,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:56,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:56,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236171551] [2020-12-22 07:23:56,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:56,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:56,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:56,360 INFO L87 Difference]: Start difference. First operand 1658 states and 2770 transitions. Second operand 3 states. [2020-12-22 07:23:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:56,449 INFO L93 Difference]: Finished difference Result 3025 states and 5075 transitions. [2020-12-22 07:23:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:56,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:23:56,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:56,465 INFO L225 Difference]: With dead ends: 3025 [2020-12-22 07:23:56,466 INFO L226 Difference]: Without dead ends: 2258 [2020-12-22 07:23:56,469 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 07:23:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2020-12-22 07:23:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 2256. [2020-12-22 07:23:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2256 states. [2020-12-22 07:23:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 3764 transitions. [2020-12-22 07:23:56,603 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 3764 transitions. Word has length 127 [2020-12-22 07:23:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:56,604 INFO L481 AbstractCegarLoop]: Abstraction has 2256 states and 3764 transitions. [2020-12-22 07:23:56,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 3764 transitions. [2020-12-22 07:23:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 07:23:56,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:56,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:56,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:23:56,607 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:56,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1832413193, now seen corresponding path program 1 times [2020-12-22 07:23:56,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:56,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645955490] [2020-12-22 07:23:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:56,778 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 07:23:56,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645955490] [2020-12-22 07:23:56,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:56,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:56,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980993215] [2020-12-22 07:23:56,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:56,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:56,790 INFO L87 Difference]: Start difference. First operand 2256 states and 3764 transitions. Second operand 3 states. [2020-12-22 07:23:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:56,900 INFO L93 Difference]: Finished difference Result 6085 states and 10129 transitions. [2020-12-22 07:23:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:56,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-22 07:23:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:56,925 INFO L225 Difference]: With dead ends: 6085 [2020-12-22 07:23:56,925 INFO L226 Difference]: Without dead ends: 4049 [2020-12-22 07:23:56,933 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 07:23:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-12-22 07:23:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-12-22 07:23:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-12-22 07:23:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6689 transitions. [2020-12-22 07:23:57,175 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6689 transitions. Word has length 127 [2020-12-22 07:23:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:57,176 INFO L481 AbstractCegarLoop]: Abstraction has 4047 states and 6689 transitions. [2020-12-22 07:23:57,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6689 transitions. [2020-12-22 07:23:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:23:57,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:57,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:57,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:23:57,179 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1181394736, now seen corresponding path program 1 times [2020-12-22 07:23:57,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:57,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775387885] [2020-12-22 07:23:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:57,310 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 07:23:57,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775387885] [2020-12-22 07:23:57,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:57,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:23:57,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539082576] [2020-12-22 07:23:57,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:23:57,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:57,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:23:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:23:57,313 INFO L87 Difference]: Start difference. First operand 4047 states and 6689 transitions. Second operand 3 states. [2020-12-22 07:23:57,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:57,467 INFO L93 Difference]: Finished difference Result 7592 states and 12588 transitions. [2020-12-22 07:23:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:23:57,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-12-22 07:23:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:57,505 INFO L225 Difference]: With dead ends: 7592 [2020-12-22 07:23:57,506 INFO L226 Difference]: Without dead ends: 5556 [2020-12-22 07:23:57,512 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 07:23:57,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2020-12-22 07:23:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 5554. [2020-12-22 07:23:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5554 states. [2020-12-22 07:23:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5554 states to 5554 states and 9147 transitions. [2020-12-22 07:23:57,791 INFO L78 Accepts]: Start accepts. Automaton has 5554 states and 9147 transitions. Word has length 130 [2020-12-22 07:23:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:57,791 INFO L481 AbstractCegarLoop]: Abstraction has 5554 states and 9147 transitions. [2020-12-22 07:23:57,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:23:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5554 states and 9147 transitions. [2020-12-22 07:23:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:23:57,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:57,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:57,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:23:57,794 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:57,795 INFO L82 PathProgramCache]: Analyzing trace with hash -163814164, now seen corresponding path program 1 times [2020-12-22 07:23:57,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:57,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7560224] [2020-12-22 07:23:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:57,945 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 07:23:57,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7560224] [2020-12-22 07:23:57,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:57,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:23:57,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470012694] [2020-12-22 07:23:57,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:23:57,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:57,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:23:57,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:23:57,950 INFO L87 Difference]: Start difference. First operand 5554 states and 9147 transitions. Second operand 6 states. [2020-12-22 07:23:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:59,165 INFO L93 Difference]: Finished difference Result 35441 states and 58898 transitions. [2020-12-22 07:23:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:23:59,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 07:23:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:59,294 INFO L225 Difference]: With dead ends: 35441 [2020-12-22 07:23:59,294 INFO L226 Difference]: Without dead ends: 30120 [2020-12-22 07:23:59,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:23:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30120 states. [2020-12-22 07:24:00,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30120 to 10702. [2020-12-22 07:24:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10702 states. [2020-12-22 07:24:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10702 states to 10702 states and 17554 transitions. [2020-12-22 07:24:00,186 INFO L78 Accepts]: Start accepts. Automaton has 10702 states and 17554 transitions. Word has length 130 [2020-12-22 07:24:00,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:00,186 INFO L481 AbstractCegarLoop]: Abstraction has 10702 states and 17554 transitions. [2020-12-22 07:24:00,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:24:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 10702 states and 17554 transitions. [2020-12-22 07:24:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 07:24:00,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:00,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:00,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:24:00,189 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:00,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:00,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1417088843, now seen corresponding path program 1 times [2020-12-22 07:24:00,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:00,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237633562] [2020-12-22 07:24:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:00,450 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 07:24:00,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237633562] [2020-12-22 07:24:00,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:00,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:00,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301593526] [2020-12-22 07:24:00,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:00,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:00,454 INFO L87 Difference]: Start difference. First operand 10702 states and 17554 transitions. Second operand 4 states. [2020-12-22 07:24:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:01,394 INFO L93 Difference]: Finished difference Result 35295 states and 58277 transitions. [2020-12-22 07:24:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:01,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-22 07:24:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:01,482 INFO L225 Difference]: With dead ends: 35295 [2020-12-22 07:24:01,482 INFO L226 Difference]: Without dead ends: 24826 [2020-12-22 07:24:01,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24826 states. [2020-12-22 07:24:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24826 to 17641. [2020-12-22 07:24:02,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17641 states. [2020-12-22 07:24:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17641 states to 17641 states and 28947 transitions. [2020-12-22 07:24:02,654 INFO L78 Accepts]: Start accepts. Automaton has 17641 states and 28947 transitions. Word has length 131 [2020-12-22 07:24:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:02,654 INFO L481 AbstractCegarLoop]: Abstraction has 17641 states and 28947 transitions. [2020-12-22 07:24:02,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 17641 states and 28947 transitions. [2020-12-22 07:24:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 07:24:02,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:02,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:02,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:24:02,657 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:02,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash -945521149, now seen corresponding path program 1 times [2020-12-22 07:24:02,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:02,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844990007] [2020-12-22 07:24:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:02,868 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 07:24:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844990007] [2020-12-22 07:24:02,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:02,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:02,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494116902] [2020-12-22 07:24:02,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:02,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:02,872 INFO L87 Difference]: Start difference. First operand 17641 states and 28947 transitions. Second operand 4 states. [2020-12-22 07:24:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:04,344 INFO L93 Difference]: Finished difference Result 57625 states and 94785 transitions. [2020-12-22 07:24:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:04,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2020-12-22 07:24:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:04,474 INFO L225 Difference]: With dead ends: 57625 [2020-12-22 07:24:04,474 INFO L226 Difference]: Without dead ends: 40217 [2020-12-22 07:24:04,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40217 states. [2020-12-22 07:24:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40217 to 28840. [2020-12-22 07:24:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28840 states. [2020-12-22 07:24:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28840 states to 28840 states and 47142 transitions. [2020-12-22 07:24:06,076 INFO L78 Accepts]: Start accepts. Automaton has 28840 states and 47142 transitions. Word has length 132 [2020-12-22 07:24:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:06,077 INFO L481 AbstractCegarLoop]: Abstraction has 28840 states and 47142 transitions. [2020-12-22 07:24:06,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 28840 states and 47142 transitions. [2020-12-22 07:24:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 07:24:06,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:06,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:06,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:24:06,080 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1002982526, now seen corresponding path program 1 times [2020-12-22 07:24:06,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:06,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929873607] [2020-12-22 07:24:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:06,193 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 07:24:06,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929873607] [2020-12-22 07:24:06,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:06,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:06,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141901903] [2020-12-22 07:24:06,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:06,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:06,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:06,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:06,197 INFO L87 Difference]: Start difference. First operand 28840 states and 47142 transitions. Second operand 4 states. [2020-12-22 07:24:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:08,143 INFO L93 Difference]: Finished difference Result 93867 states and 153795 transitions. [2020-12-22 07:24:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:08,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 07:24:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:08,318 INFO L225 Difference]: With dead ends: 93867 [2020-12-22 07:24:08,319 INFO L226 Difference]: Without dead ends: 65260 [2020-12-22 07:24:08,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65260 states. [2020-12-22 07:24:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65260 to 46907. [2020-12-22 07:24:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46907 states. [2020-12-22 07:24:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46907 states to 46907 states and 76377 transitions. [2020-12-22 07:24:10,593 INFO L78 Accepts]: Start accepts. Automaton has 46907 states and 76377 transitions. Word has length 133 [2020-12-22 07:24:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:10,594 INFO L481 AbstractCegarLoop]: Abstraction has 46907 states and 76377 transitions. [2020-12-22 07:24:10,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 46907 states and 76377 transitions. [2020-12-22 07:24:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 07:24:10,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:10,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:10,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:24:10,596 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1679686426, now seen corresponding path program 1 times [2020-12-22 07:24:10,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:10,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972666852] [2020-12-22 07:24:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:10,698 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 07:24:10,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972666852] [2020-12-22 07:24:10,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:10,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294954637] [2020-12-22 07:24:10,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:10,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:10,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:10,701 INFO L87 Difference]: Start difference. First operand 46907 states and 76377 transitions. Second operand 4 states. [2020-12-22 07:24:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:13,630 INFO L93 Difference]: Finished difference Result 150981 states and 246405 transitions. [2020-12-22 07:24:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:13,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2020-12-22 07:24:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:13,837 INFO L225 Difference]: With dead ends: 150981 [2020-12-22 07:24:13,838 INFO L226 Difference]: Without dead ends: 104307 [2020-12-22 07:24:13,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104307 states. [2020-12-22 07:24:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104307 to 75382. [2020-12-22 07:24:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75382 states. [2020-12-22 07:24:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75382 states to 75382 states and 122272 transitions. [2020-12-22 07:24:16,752 INFO L78 Accepts]: Start accepts. Automaton has 75382 states and 122272 transitions. Word has length 134 [2020-12-22 07:24:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:16,753 INFO L481 AbstractCegarLoop]: Abstraction has 75382 states and 122272 transitions. [2020-12-22 07:24:16,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 75382 states and 122272 transitions. [2020-12-22 07:24:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:24:16,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:16,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:16,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:24:16,755 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1349768178, now seen corresponding path program 1 times [2020-12-22 07:24:16,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:16,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919460014] [2020-12-22 07:24:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:17,178 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-22 07:24:17,272 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 07:24:17,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919460014] [2020-12-22 07:24:17,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:17,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:24:17,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559242635] [2020-12-22 07:24:17,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:24:17,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:24:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:24:17,278 INFO L87 Difference]: Start difference. First operand 75382 states and 122272 transitions. Second operand 6 states. [2020-12-22 07:24:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:19,788 INFO L93 Difference]: Finished difference Result 150533 states and 244174 transitions. [2020-12-22 07:24:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:24:19,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2020-12-22 07:24:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:19,912 INFO L225 Difference]: With dead ends: 150533 [2020-12-22 07:24:19,912 INFO L226 Difference]: Without dead ends: 75384 [2020-12-22 07:24:19,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:24:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75384 states. [2020-12-22 07:24:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75384 to 75382. [2020-12-22 07:24:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75382 states. [2020-12-22 07:24:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75382 states to 75382 states and 121647 transitions. [2020-12-22 07:24:22,663 INFO L78 Accepts]: Start accepts. Automaton has 75382 states and 121647 transitions. Word has length 136 [2020-12-22 07:24:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:22,664 INFO L481 AbstractCegarLoop]: Abstraction has 75382 states and 121647 transitions. [2020-12-22 07:24:22,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:24:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 75382 states and 121647 transitions. [2020-12-22 07:24:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 07:24:22,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:22,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:22,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:24:22,667 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash 412618117, now seen corresponding path program 1 times [2020-12-22 07:24:22,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:22,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171217815] [2020-12-22 07:24:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:22,987 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 07:24:22,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171217815] [2020-12-22 07:24:22,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:22,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:22,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481863578] [2020-12-22 07:24:22,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:22,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:22,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:22,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:22,990 INFO L87 Difference]: Start difference. First operand 75382 states and 121647 transitions. Second operand 4 states. [2020-12-22 07:24:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:27,311 INFO L93 Difference]: Finished difference Result 224259 states and 361869 transitions. [2020-12-22 07:24:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:27,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 139 [2020-12-22 07:24:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:27,596 INFO L225 Difference]: With dead ends: 224259 [2020-12-22 07:24:27,596 INFO L226 Difference]: Without dead ends: 148888 [2020-12-22 07:24:27,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148888 states. [2020-12-22 07:24:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148888 to 148886. [2020-12-22 07:24:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148886 states. [2020-12-22 07:24:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148886 states to 148886 states and 239064 transitions. [2020-12-22 07:24:32,794 INFO L78 Accepts]: Start accepts. Automaton has 148886 states and 239064 transitions. Word has length 139 [2020-12-22 07:24:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:32,794 INFO L481 AbstractCegarLoop]: Abstraction has 148886 states and 239064 transitions. [2020-12-22 07:24:32,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 148886 states and 239064 transitions. [2020-12-22 07:24:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 07:24:32,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:32,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:32,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:24:32,797 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:32,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1038580458, now seen corresponding path program 1 times [2020-12-22 07:24:32,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:32,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54249109] [2020-12-22 07:24:32,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:33,005 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 07:24:33,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54249109] [2020-12-22 07:24:33,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:33,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:33,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599492920] [2020-12-22 07:24:33,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:33,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:33,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:33,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:33,007 INFO L87 Difference]: Start difference. First operand 148886 states and 239064 transitions. Second operand 4 states. [2020-12-22 07:24:33,272 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-22 07:24:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:41,784 INFO L93 Difference]: Finished difference Result 442896 states and 711071 transitions. [2020-12-22 07:24:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:41,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2020-12-22 07:24:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:42,395 INFO L225 Difference]: With dead ends: 442896 [2020-12-22 07:24:42,395 INFO L226 Difference]: Without dead ends: 294022 [2020-12-22 07:24:42,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294022 states. [2020-12-22 07:24:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294022 to 294020. [2020-12-22 07:24:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294020 states. [2020-12-22 07:24:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294020 states to 294020 states and 469674 transitions. [2020-12-22 07:24:53,305 INFO L78 Accepts]: Start accepts. Automaton has 294020 states and 469674 transitions. Word has length 141 [2020-12-22 07:24:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:24:53,305 INFO L481 AbstractCegarLoop]: Abstraction has 294020 states and 469674 transitions. [2020-12-22 07:24:53,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:24:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 294020 states and 469674 transitions. [2020-12-22 07:24:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 07:24:53,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:24:53,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:53,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:24:53,309 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:24:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:24:53,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1947387771, now seen corresponding path program 1 times [2020-12-22 07:24:53,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:24:53,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508223472] [2020-12-22 07:24:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:24:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:24:54,062 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 07:24:54,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508223472] [2020-12-22 07:24:54,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:24:54,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:24:54,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526234300] [2020-12-22 07:24:54,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:24:54,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:24:54,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:24:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:24:54,067 INFO L87 Difference]: Start difference. First operand 294020 states and 469674 transitions. Second operand 4 states. [2020-12-22 07:25:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:25:11,896 INFO L93 Difference]: Finished difference Result 874537 states and 1396783 transitions. [2020-12-22 07:25:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:25:11,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2020-12-22 07:25:11,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:25:13,548 INFO L225 Difference]: With dead ends: 874537 [2020-12-22 07:25:13,548 INFO L226 Difference]: Without dead ends: 580544 [2020-12-22 07:25:13,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:25:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580544 states. [2020-12-22 07:25:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580544 to 580542. [2020-12-22 07:25:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580542 states. [2020-12-22 07:25:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580542 states to 580542 states and 922451 transitions. [2020-12-22 07:25:40,968 INFO L78 Accepts]: Start accepts. Automaton has 580542 states and 922451 transitions. Word has length 143 [2020-12-22 07:25:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:25:40,969 INFO L481 AbstractCegarLoop]: Abstraction has 580542 states and 922451 transitions. [2020-12-22 07:25:40,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:25:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 580542 states and 922451 transitions. [2020-12-22 07:25:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 07:25:40,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:25:40,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:25:40,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:25:40,976 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:25:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:25:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash 380264234, now seen corresponding path program 1 times [2020-12-22 07:25:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:25:40,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045180956] [2020-12-22 07:25:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:25:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:25:41,210 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 07:25:41,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045180956] [2020-12-22 07:25:41,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:25:41,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:25:41,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805859947] [2020-12-22 07:25:41,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:25:41,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:25:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:25:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:25:41,213 INFO L87 Difference]: Start difference. First operand 580542 states and 922451 transitions. Second operand 4 states. [2020-12-22 07:26:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:26:24,652 INFO L93 Difference]: Finished difference Result 1726418 states and 2742601 transitions. [2020-12-22 07:26:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:26:24,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2020-12-22 07:26:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:26:29,628 INFO L225 Difference]: With dead ends: 1726418 [2020-12-22 07:26:29,628 INFO L226 Difference]: Without dead ends: 1146012 [2020-12-22 07:26:31,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:26:32,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146012 states.