/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:35:24,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:35:24,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:35:24,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:35:24,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:35:24,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:35:24,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:35:24,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:35:24,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:35:24,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:35:24,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:35:24,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:35:24,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:35:24,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:35:24,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:35:24,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:35:24,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:35:24,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:35:24,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:35:24,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:35:24,918 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:35:24,971 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:35:24,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:35:24,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:35:24,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:35:24,975 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:35:24,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:35:24,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:35:24,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:35:24,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:35:24,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:35:24,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:35:24,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:35:24,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:35:24,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:35:24,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:35:24,978 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:35:24,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:35:24,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:35:24,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:35:24,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:35:24,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:35:24,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:35:24,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:35:24,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:35:24,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:35:24,981 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:35:25,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:35:25,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:35:25,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:35:25,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:35:25,480 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:35:25,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c [2020-12-22 07:35:25,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d691ed7/1ed1a9f0d2f54786be2a899eb6da989b/FLAG45ab47acd [2020-12-22 07:35:26,249 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:35:26,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c [2020-12-22 07:35:26,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d691ed7/1ed1a9f0d2f54786be2a899eb6da989b/FLAG45ab47acd [2020-12-22 07:35:26,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d691ed7/1ed1a9f0d2f54786be2a899eb6da989b [2020-12-22 07:35:26,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:35:26,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:35:26,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:35:26,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:35:26,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:35:26,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:26,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@232b1740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26, skipping insertion in model container [2020-12-22 07:35:26,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:26,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:35:26,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:35:26,810 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c[15112,15125] [2020-12-22 07:35:26,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:35:26,825 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:35:26,891 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.1.ufo.BOUNDED-12.pals.c[15112,15125] [2020-12-22 07:35:26,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:35:26,922 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:35:26,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26 WrapperNode [2020-12-22 07:35:26,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:35:26,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:35:26,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:35:26,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:35:26,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:26,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:27,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:35:27,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:35:27,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:35:27,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:35:27,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:27,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:27,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:27,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:27,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:27,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:27,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (1/1) ... [2020-12-22 07:35:27,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:35:27,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:35:27,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:35:27,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:35:27,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (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 07:35:27,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:35:27,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:35:27,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:35:27,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:35:28,165 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:35:28,165 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 07:35:28,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:35:28 BoogieIcfgContainer [2020-12-22 07:35:28,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:35:28,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:35:28,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:35:28,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:35:28,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:35:26" (1/3) ... [2020-12-22 07:35:28,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5410130e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:35:28, skipping insertion in model container [2020-12-22 07:35:28,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:35:26" (2/3) ... [2020-12-22 07:35:28,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5410130e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:35:28, skipping insertion in model container [2020-12-22 07:35:28,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:35:28" (3/3) ... [2020-12-22 07:35:28,177 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.BOUNDED-12.pals.c [2020-12-22 07:35:28,185 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:35:28,190 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:35:28,214 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:35:28,250 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:35:28,250 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:35:28,250 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:35:28,250 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:35:28,250 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:35:28,251 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:35:28,251 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:35:28,251 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:35:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2020-12-22 07:35:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:35:28,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:28,283 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] [2020-12-22 07:35:28,283 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:28,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1259035486, now seen corresponding path program 1 times [2020-12-22 07:35:28,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:28,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738196341] [2020-12-22 07:35:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:28,574 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 07:35:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738196341] [2020-12-22 07:35:28,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:28,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:35:28,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296957167] [2020-12-22 07:35:28,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:35:28,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:35:28,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:35:28,601 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 2 states. [2020-12-22 07:35:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:28,641 INFO L93 Difference]: Finished difference Result 175 states and 290 transitions. [2020-12-22 07:35:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:35:28,645 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:35:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:28,657 INFO L225 Difference]: With dead ends: 175 [2020-12-22 07:35:28,658 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 07:35:28,661 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 07:35:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 07:35:28,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 07:35:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 07:35:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 181 transitions. [2020-12-22 07:35:28,714 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 181 transitions. Word has length 37 [2020-12-22 07:35:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:28,715 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 181 transitions. [2020-12-22 07:35:28,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:35:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 181 transitions. [2020-12-22 07:35:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:35:28,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:28,717 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] [2020-12-22 07:35:28,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:35:28,718 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:28,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1533795100, now seen corresponding path program 1 times [2020-12-22 07:35:28,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:28,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631627336] [2020-12-22 07:35:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:28,849 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 07:35:28,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631627336] [2020-12-22 07:35:28,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:28,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:35:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219172573] [2020-12-22 07:35:28,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:35:28,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:35:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:35:28,853 INFO L87 Difference]: Start difference. First operand 106 states and 181 transitions. Second operand 5 states. [2020-12-22 07:35:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:28,965 INFO L93 Difference]: Finished difference Result 170 states and 280 transitions. [2020-12-22 07:35:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:35:28,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:35:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:28,968 INFO L225 Difference]: With dead ends: 170 [2020-12-22 07:35:28,968 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 07:35:28,970 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 07:35:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 07:35:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 07:35:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 07:35:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2020-12-22 07:35:28,982 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 37 [2020-12-22 07:35:28,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:28,982 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2020-12-22 07:35:28,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:35:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2020-12-22 07:35:28,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:28,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:28,986 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] [2020-12-22 07:35:28,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:35:28,986 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:28,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1950823117, now seen corresponding path program 1 times [2020-12-22 07:35:28,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:28,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127453088] [2020-12-22 07:35:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:29,162 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 07:35:29,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127453088] [2020-12-22 07:35:29,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:29,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256404111] [2020-12-22 07:35:29,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:29,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:29,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:29,168 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand 3 states. [2020-12-22 07:35:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:29,237 INFO L93 Difference]: Finished difference Result 220 states and 321 transitions. [2020-12-22 07:35:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:29,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:29,241 INFO L225 Difference]: With dead ends: 220 [2020-12-22 07:35:29,241 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 07:35:29,243 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 07:35:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 07:35:29,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-12-22 07:35:29,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 07:35:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 224 transitions. [2020-12-22 07:35:29,264 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 224 transitions. Word has length 76 [2020-12-22 07:35:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:29,265 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 224 transitions. [2020-12-22 07:35:29,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 224 transitions. [2020-12-22 07:35:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:29,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:29,269 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] [2020-12-22 07:35:29,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:35:29,270 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash 699917825, now seen corresponding path program 1 times [2020-12-22 07:35:29,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:29,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990110076] [2020-12-22 07:35:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:29,458 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 07:35:29,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990110076] [2020-12-22 07:35:29,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:29,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:29,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393220808] [2020-12-22 07:35:29,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:29,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:29,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:29,462 INFO L87 Difference]: Start difference. First operand 158 states and 224 transitions. Second operand 3 states. [2020-12-22 07:35:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:29,498 INFO L93 Difference]: Finished difference Result 370 states and 560 transitions. [2020-12-22 07:35:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:29,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:29,503 INFO L225 Difference]: With dead ends: 370 [2020-12-22 07:35:29,503 INFO L226 Difference]: Without dead ends: 258 [2020-12-22 07:35:29,505 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 07:35:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-22 07:35:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-12-22 07:35:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-22 07:35:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 379 transitions. [2020-12-22 07:35:29,531 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 379 transitions. Word has length 76 [2020-12-22 07:35:29,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:29,531 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 379 transitions. [2020-12-22 07:35:29,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 379 transitions. [2020-12-22 07:35:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:29,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:29,535 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] [2020-12-22 07:35:29,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:35:29,535 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:29,536 INFO L82 PathProgramCache]: Analyzing trace with hash -45664905, now seen corresponding path program 1 times [2020-12-22 07:35:29,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:29,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945967277] [2020-12-22 07:35:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:29,732 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 07:35:29,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945967277] [2020-12-22 07:35:29,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:29,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:29,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928073145] [2020-12-22 07:35:29,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:29,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:29,738 INFO L87 Difference]: Start difference. First operand 256 states and 379 transitions. Second operand 3 states. [2020-12-22 07:35:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:29,817 INFO L93 Difference]: Finished difference Result 652 states and 1005 transitions. [2020-12-22 07:35:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:29,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:29,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:29,827 INFO L225 Difference]: With dead ends: 652 [2020-12-22 07:35:29,827 INFO L226 Difference]: Without dead ends: 442 [2020-12-22 07:35:29,832 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 07:35:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-12-22 07:35:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2020-12-22 07:35:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-12-22 07:35:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 667 transitions. [2020-12-22 07:35:29,894 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 667 transitions. Word has length 76 [2020-12-22 07:35:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:29,894 INFO L481 AbstractCegarLoop]: Abstraction has 440 states and 667 transitions. [2020-12-22 07:35:29,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 667 transitions. [2020-12-22 07:35:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:29,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:29,898 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] [2020-12-22 07:35:29,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:35:29,898 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1985695763, now seen corresponding path program 1 times [2020-12-22 07:35:29,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:29,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911674699] [2020-12-22 07:35:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:29,991 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 07:35:29,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911674699] [2020-12-22 07:35:29,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:29,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:29,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610797058] [2020-12-22 07:35:29,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:29,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:29,994 INFO L87 Difference]: Start difference. First operand 440 states and 667 transitions. Second operand 3 states. [2020-12-22 07:35:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:30,036 INFO L93 Difference]: Finished difference Result 1180 states and 1829 transitions. [2020-12-22 07:35:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:30,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:35:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:30,042 INFO L225 Difference]: With dead ends: 1180 [2020-12-22 07:35:30,043 INFO L226 Difference]: Without dead ends: 786 [2020-12-22 07:35:30,044 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 07:35:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-12-22 07:35:30,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 784. [2020-12-22 07:35:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-12-22 07:35:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1199 transitions. [2020-12-22 07:35:30,086 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1199 transitions. Word has length 76 [2020-12-22 07:35:30,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:30,087 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1199 transitions. [2020-12-22 07:35:30,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1199 transitions. [2020-12-22 07:35:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:30,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:30,089 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] [2020-12-22 07:35:30,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:35:30,089 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash 714986851, now seen corresponding path program 1 times [2020-12-22 07:35:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:30,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365367854] [2020-12-22 07:35:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:30,237 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 07:35:30,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365367854] [2020-12-22 07:35:30,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:30,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:35:30,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833814171] [2020-12-22 07:35:30,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:35:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:30,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:35:30,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:35:30,243 INFO L87 Difference]: Start difference. First operand 784 states and 1199 transitions. Second operand 7 states. [2020-12-22 07:35:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:30,521 INFO L93 Difference]: Finished difference Result 2260 states and 3505 transitions. [2020-12-22 07:35:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:35:30,521 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-22 07:35:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:30,530 INFO L225 Difference]: With dead ends: 2260 [2020-12-22 07:35:30,530 INFO L226 Difference]: Without dead ends: 1522 [2020-12-22 07:35:30,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:35:30,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2020-12-22 07:35:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1520. [2020-12-22 07:35:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1520 states. [2020-12-22 07:35:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2343 transitions. [2020-12-22 07:35:30,599 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2343 transitions. Word has length 76 [2020-12-22 07:35:30,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:30,599 INFO L481 AbstractCegarLoop]: Abstraction has 1520 states and 2343 transitions. [2020-12-22 07:35:30,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:35:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2343 transitions. [2020-12-22 07:35:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:35:30,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:30,601 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] [2020-12-22 07:35:30,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:35:30,601 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:30,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1224459941, now seen corresponding path program 1 times [2020-12-22 07:35:30,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:30,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572322666] [2020-12-22 07:35:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:30,749 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 07:35:30,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572322666] [2020-12-22 07:35:30,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:30,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:30,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383850076] [2020-12-22 07:35:30,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:30,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:30,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:30,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:30,752 INFO L87 Difference]: Start difference. First operand 1520 states and 2343 transitions. Second operand 8 states. [2020-12-22 07:35:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:32,111 INFO L93 Difference]: Finished difference Result 19208 states and 29907 transitions. [2020-12-22 07:35:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:35:32,112 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-12-22 07:35:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:32,243 INFO L225 Difference]: With dead ends: 19208 [2020-12-22 07:35:32,243 INFO L226 Difference]: Without dead ends: 17734 [2020-12-22 07:35:32,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:35:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17734 states. [2020-12-22 07:35:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17734 to 2992. [2020-12-22 07:35:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2992 states. [2020-12-22 07:35:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 4575 transitions. [2020-12-22 07:35:32,664 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 4575 transitions. Word has length 76 [2020-12-22 07:35:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:32,665 INFO L481 AbstractCegarLoop]: Abstraction has 2992 states and 4575 transitions. [2020-12-22 07:35:32,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 4575 transitions. [2020-12-22 07:35:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:32,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:32,666 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] [2020-12-22 07:35:32,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:35:32,666 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1530728779, now seen corresponding path program 1 times [2020-12-22 07:35:32,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:32,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647622391] [2020-12-22 07:35:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:32,742 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 07:35:32,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647622391] [2020-12-22 07:35:32,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:32,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:32,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512419789] [2020-12-22 07:35:32,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:32,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:32,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:32,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:32,751 INFO L87 Difference]: Start difference. First operand 2992 states and 4575 transitions. Second operand 3 states. [2020-12-22 07:35:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:33,106 INFO L93 Difference]: Finished difference Result 7508 states and 11425 transitions. [2020-12-22 07:35:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:33,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:35:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:33,150 INFO L225 Difference]: With dead ends: 7508 [2020-12-22 07:35:33,150 INFO L226 Difference]: Without dead ends: 4562 [2020-12-22 07:35:33,155 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 07:35:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2020-12-22 07:35:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 4560. [2020-12-22 07:35:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2020-12-22 07:35:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 6799 transitions. [2020-12-22 07:35:33,552 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 6799 transitions. Word has length 78 [2020-12-22 07:35:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:33,553 INFO L481 AbstractCegarLoop]: Abstraction has 4560 states and 6799 transitions. [2020-12-22 07:35:33,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 6799 transitions. [2020-12-22 07:35:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:33,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:33,554 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] [2020-12-22 07:35:33,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:35:33,555 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:33,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1464235267, now seen corresponding path program 1 times [2020-12-22 07:35:33,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:33,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310077198] [2020-12-22 07:35:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:33,895 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 07:35:33,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310077198] [2020-12-22 07:35:33,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:33,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:33,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61823449] [2020-12-22 07:35:33,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:33,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:33,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:33,900 INFO L87 Difference]: Start difference. First operand 4560 states and 6799 transitions. Second operand 8 states. [2020-12-22 07:35:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:34,827 INFO L93 Difference]: Finished difference Result 11318 states and 16938 transitions. [2020-12-22 07:35:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:35:34,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-12-22 07:35:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:34,845 INFO L225 Difference]: With dead ends: 11318 [2020-12-22 07:35:34,846 INFO L226 Difference]: Without dead ends: 6804 [2020-12-22 07:35:34,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:35:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6804 states. [2020-12-22 07:35:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6804 to 4560. [2020-12-22 07:35:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4560 states. [2020-12-22 07:35:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 6767 transitions. [2020-12-22 07:35:35,295 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 6767 transitions. Word has length 78 [2020-12-22 07:35:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:35,296 INFO L481 AbstractCegarLoop]: Abstraction has 4560 states and 6767 transitions. [2020-12-22 07:35:35,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 6767 transitions. [2020-12-22 07:35:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:35,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:35,297 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] [2020-12-22 07:35:35,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:35:35,297 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash 324678809, now seen corresponding path program 1 times [2020-12-22 07:35:35,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:35,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111446455] [2020-12-22 07:35:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:35,381 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 07:35:35,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111446455] [2020-12-22 07:35:35,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:35,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:35,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396646817] [2020-12-22 07:35:35,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:35,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:35,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:35,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:35,387 INFO L87 Difference]: Start difference. First operand 4560 states and 6767 transitions. Second operand 3 states. [2020-12-22 07:35:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:36,099 INFO L93 Difference]: Finished difference Result 13012 states and 19249 transitions. [2020-12-22 07:35:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:36,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:35:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:36,123 INFO L225 Difference]: With dead ends: 13012 [2020-12-22 07:35:36,124 INFO L226 Difference]: Without dead ends: 8498 [2020-12-22 07:35:36,132 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 07:35:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2020-12-22 07:35:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 8496. [2020-12-22 07:35:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8496 states. [2020-12-22 07:35:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8496 states to 8496 states and 12431 transitions. [2020-12-22 07:35:36,895 INFO L78 Accepts]: Start accepts. Automaton has 8496 states and 12431 transitions. Word has length 78 [2020-12-22 07:35:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:36,895 INFO L481 AbstractCegarLoop]: Abstraction has 8496 states and 12431 transitions. [2020-12-22 07:35:36,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 8496 states and 12431 transitions. [2020-12-22 07:35:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:35:36,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:36,897 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] [2020-12-22 07:35:36,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:35:36,897 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1572186425, now seen corresponding path program 1 times [2020-12-22 07:35:36,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:36,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895352252] [2020-12-22 07:35:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:36,975 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 07:35:36,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895352252] [2020-12-22 07:35:36,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:36,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:36,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141939444] [2020-12-22 07:35:36,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:36,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:36,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:36,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:36,977 INFO L87 Difference]: Start difference. First operand 8496 states and 12431 transitions. Second operand 3 states. [2020-12-22 07:35:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:38,287 INFO L93 Difference]: Finished difference Result 24244 states and 35281 transitions. [2020-12-22 07:35:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:38,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:35:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:38,325 INFO L225 Difference]: With dead ends: 24244 [2020-12-22 07:35:38,325 INFO L226 Difference]: Without dead ends: 15794 [2020-12-22 07:35:38,338 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 07:35:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15794 states. [2020-12-22 07:35:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15794 to 15792. [2020-12-22 07:35:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15792 states. [2020-12-22 07:35:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15792 states to 15792 states and 22703 transitions. [2020-12-22 07:35:39,779 INFO L78 Accepts]: Start accepts. Automaton has 15792 states and 22703 transitions. Word has length 78 [2020-12-22 07:35:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:39,779 INFO L481 AbstractCegarLoop]: Abstraction has 15792 states and 22703 transitions. [2020-12-22 07:35:39,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15792 states and 22703 transitions. [2020-12-22 07:35:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:35:39,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:39,780 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] [2020-12-22 07:35:39,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:35:39,781 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:39,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:39,782 INFO L82 PathProgramCache]: Analyzing trace with hash -158143790, now seen corresponding path program 1 times [2020-12-22 07:35:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:39,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217306262] [2020-12-22 07:35:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:39,839 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 07:35:39,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217306262] [2020-12-22 07:35:39,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:39,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:35:39,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531289659] [2020-12-22 07:35:39,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:35:39,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:35:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:35:39,842 INFO L87 Difference]: Start difference. First operand 15792 states and 22703 transitions. Second operand 3 states. [2020-12-22 07:35:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:40,963 INFO L93 Difference]: Finished difference Result 33942 states and 48851 transitions. [2020-12-22 07:35:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:35:40,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:35:40,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:41,009 INFO L225 Difference]: With dead ends: 33942 [2020-12-22 07:35:41,009 INFO L226 Difference]: Without dead ends: 18196 [2020-12-22 07:35:41,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:35:41,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18196 states. [2020-12-22 07:35:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18196 to 18194. [2020-12-22 07:35:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18194 states. [2020-12-22 07:35:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18194 states to 18194 states and 26097 transitions. [2020-12-22 07:35:42,334 INFO L78 Accepts]: Start accepts. Automaton has 18194 states and 26097 transitions. Word has length 79 [2020-12-22 07:35:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:42,335 INFO L481 AbstractCegarLoop]: Abstraction has 18194 states and 26097 transitions. [2020-12-22 07:35:42,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:35:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 18194 states and 26097 transitions. [2020-12-22 07:35:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:35:42,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:42,337 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] [2020-12-22 07:35:42,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:35:42,337 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:42,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1438624019, now seen corresponding path program 1 times [2020-12-22 07:35:42,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:42,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12006576] [2020-12-22 07:35:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:42,478 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 07:35:42,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12006576] [2020-12-22 07:35:42,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:42,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:42,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177470975] [2020-12-22 07:35:42,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:42,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:42,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:42,481 INFO L87 Difference]: Start difference. First operand 18194 states and 26097 transitions. Second operand 8 states. [2020-12-22 07:35:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:44,320 INFO L93 Difference]: Finished difference Result 29143 states and 41617 transitions. [2020-12-22 07:35:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:35:44,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 07:35:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:44,373 INFO L225 Difference]: With dead ends: 29143 [2020-12-22 07:35:44,374 INFO L226 Difference]: Without dead ends: 29141 [2020-12-22 07:35:44,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:35:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29141 states. [2020-12-22 07:35:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29141 to 18578. [2020-12-22 07:35:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18578 states. [2020-12-22 07:35:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18578 states to 18578 states and 26321 transitions. [2020-12-22 07:35:46,238 INFO L78 Accepts]: Start accepts. Automaton has 18578 states and 26321 transitions. Word has length 79 [2020-12-22 07:35:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:46,238 INFO L481 AbstractCegarLoop]: Abstraction has 18578 states and 26321 transitions. [2020-12-22 07:35:46,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 18578 states and 26321 transitions. [2020-12-22 07:35:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:35:46,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:46,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:46,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:35:46,253 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:46,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:46,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1530216785, now seen corresponding path program 1 times [2020-12-22 07:35:46,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:46,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792887067] [2020-12-22 07:35:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 07:35:46,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792887067] [2020-12-22 07:35:46,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:46,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:46,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897874097] [2020-12-22 07:35:46,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:46,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:46,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:46,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:46,482 INFO L87 Difference]: Start difference. First operand 18578 states and 26321 transitions. Second operand 8 states. [2020-12-22 07:35:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:35:53,326 INFO L93 Difference]: Finished difference Result 136512 states and 193352 transitions. [2020-12-22 07:35:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:35:53,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:35:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:35:53,500 INFO L225 Difference]: With dead ends: 136512 [2020-12-22 07:35:53,501 INFO L226 Difference]: Without dead ends: 117982 [2020-12-22 07:35:53,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:35:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117982 states. [2020-12-22 07:35:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117982 to 37106. [2020-12-22 07:35:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37106 states. [2020-12-22 07:35:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37106 states to 37106 states and 52369 transitions. [2020-12-22 07:35:57,599 INFO L78 Accepts]: Start accepts. Automaton has 37106 states and 52369 transitions. Word has length 111 [2020-12-22 07:35:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:35:57,599 INFO L481 AbstractCegarLoop]: Abstraction has 37106 states and 52369 transitions. [2020-12-22 07:35:57,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:35:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 37106 states and 52369 transitions. [2020-12-22 07:35:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:35:57,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:35:57,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:35:57,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:35:57,612 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:35:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:35:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1517242895, now seen corresponding path program 1 times [2020-12-22 07:35:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:35:57,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177275115] [2020-12-22 07:35:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:35:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:35:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:35:57,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177275115] [2020-12-22 07:35:57,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:35:57,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:35:57,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494234847] [2020-12-22 07:35:57,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:35:57,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:35:57,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:35:57,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:35:57,941 INFO L87 Difference]: Start difference. First operand 37106 states and 52369 transitions. Second operand 8 states. [2020-12-22 07:36:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:07,657 INFO L93 Difference]: Finished difference Result 155040 states and 219400 transitions. [2020-12-22 07:36:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:07,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:36:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:08,166 INFO L225 Difference]: With dead ends: 155040 [2020-12-22 07:36:08,166 INFO L226 Difference]: Without dead ends: 136510 [2020-12-22 07:36:08,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136510 states. [2020-12-22 07:36:14,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136510 to 64786. [2020-12-22 07:36:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64786 states. [2020-12-22 07:36:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64786 states to 64786 states and 91169 transitions. [2020-12-22 07:36:14,608 INFO L78 Accepts]: Start accepts. Automaton has 64786 states and 91169 transitions. Word has length 111 [2020-12-22 07:36:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:14,609 INFO L481 AbstractCegarLoop]: Abstraction has 64786 states and 91169 transitions. [2020-12-22 07:36:14,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64786 states and 91169 transitions. [2020-12-22 07:36:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:36:14,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:14,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:14,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:36:14,623 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash -47809913, now seen corresponding path program 1 times [2020-12-22 07:36:14,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:14,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124333496] [2020-12-22 07:36:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:36:14,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124333496] [2020-12-22 07:36:14,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:14,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:14,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106284548] [2020-12-22 07:36:14,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:14,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:14,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:14,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:14,793 INFO L87 Difference]: Start difference. First operand 64786 states and 91169 transitions. Second operand 8 states. [2020-12-22 07:36:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:26,613 INFO L93 Difference]: Finished difference Result 173568 states and 245448 transitions. [2020-12-22 07:36:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:26,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:36:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:27,012 INFO L225 Difference]: With dead ends: 173568 [2020-12-22 07:36:27,012 INFO L226 Difference]: Without dead ends: 155038 [2020-12-22 07:36:27,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155038 states. [2020-12-22 07:36:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155038 to 83314. [2020-12-22 07:36:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83314 states. [2020-12-22 07:36:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83314 states to 83314 states and 117217 transitions. [2020-12-22 07:36:34,638 INFO L78 Accepts]: Start accepts. Automaton has 83314 states and 117217 transitions. Word has length 111 [2020-12-22 07:36:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:34,639 INFO L481 AbstractCegarLoop]: Abstraction has 83314 states and 117217 transitions. [2020-12-22 07:36:34,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 83314 states and 117217 transitions. [2020-12-22 07:36:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:36:34,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:34,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:34,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:36:34,653 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:34,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:34,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1283268953, now seen corresponding path program 1 times [2020-12-22 07:36:34,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:34,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748480531] [2020-12-22 07:36:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:36:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748480531] [2020-12-22 07:36:34,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:34,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:34,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561501086] [2020-12-22 07:36:34,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:34,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:34,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:34,988 INFO L87 Difference]: Start difference. First operand 83314 states and 117217 transitions. Second operand 8 states. [2020-12-22 07:36:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:48,254 INFO L93 Difference]: Finished difference Result 192096 states and 271496 transitions. [2020-12-22 07:36:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:48,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:36:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:48,658 INFO L225 Difference]: With dead ends: 192096 [2020-12-22 07:36:48,658 INFO L226 Difference]: Without dead ends: 173566 [2020-12-22 07:36:48,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173566 states. [2020-12-22 07:36:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173566 to 101842. [2020-12-22 07:36:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101842 states. [2020-12-22 07:36:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101842 states to 101842 states and 143265 transitions. [2020-12-22 07:36:58,082 INFO L78 Accepts]: Start accepts. Automaton has 101842 states and 143265 transitions. Word has length 111 [2020-12-22 07:36:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:58,082 INFO L481 AbstractCegarLoop]: Abstraction has 101842 states and 143265 transitions. [2020-12-22 07:36:58,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 101842 states and 143265 transitions. [2020-12-22 07:36:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:36:58,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:58,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:36:58,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:36:58,107 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1590702791, now seen corresponding path program 1 times [2020-12-22 07:36:58,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:58,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307617510] [2020-12-22 07:36:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:36:58,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307617510] [2020-12-22 07:36:58,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:58,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:58,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911221971] [2020-12-22 07:36:58,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:58,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:58,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:58,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:58,285 INFO L87 Difference]: Start difference. First operand 101842 states and 143265 transitions. Second operand 8 states. [2020-12-22 07:37:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:14,590 INFO L93 Difference]: Finished difference Result 210624 states and 297544 transitions. [2020-12-22 07:37:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:14,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:37:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:14,981 INFO L225 Difference]: With dead ends: 210624 [2020-12-22 07:37:14,981 INFO L226 Difference]: Without dead ends: 192094 [2020-12-22 07:37:15,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192094 states. [2020-12-22 07:37:26,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192094 to 120370. [2020-12-22 07:37:26,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120370 states. [2020-12-22 07:37:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120370 states to 120370 states and 169313 transitions. [2020-12-22 07:37:26,297 INFO L78 Accepts]: Start accepts. Automaton has 120370 states and 169313 transitions. Word has length 111 [2020-12-22 07:37:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:26,297 INFO L481 AbstractCegarLoop]: Abstraction has 120370 states and 169313 transitions. [2020-12-22 07:37:26,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 120370 states and 169313 transitions. [2020-12-22 07:37:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:37:26,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:26,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:37:26,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:37:26,314 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:26,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:26,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1024882407, now seen corresponding path program 1 times [2020-12-22 07:37:26,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:26,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726786275] [2020-12-22 07:37:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:37:26,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726786275] [2020-12-22 07:37:26,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:26,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:37:26,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340688807] [2020-12-22 07:37:26,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:37:26,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:37:26,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:37:26,832 INFO L87 Difference]: Start difference. First operand 120370 states and 169313 transitions. Second operand 8 states. [2020-12-22 07:37:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:45,905 INFO L93 Difference]: Finished difference Result 224352 states and 316872 transitions. [2020-12-22 07:37:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:45,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 07:37:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:46,393 INFO L225 Difference]: With dead ends: 224352 [2020-12-22 07:37:46,393 INFO L226 Difference]: Without dead ends: 208222 [2020-12-22 07:37:46,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208222 states. [2020-12-22 07:38:00,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208222 to 136498. [2020-12-22 07:38:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136498 states. [2020-12-22 07:38:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 192033 transitions. [2020-12-22 07:38:00,403 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 192033 transitions. Word has length 111 [2020-12-22 07:38:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:00,403 INFO L481 AbstractCegarLoop]: Abstraction has 136498 states and 192033 transitions. [2020-12-22 07:38:00,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:38:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 192033 transitions. [2020-12-22 07:38:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:38:00,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:00,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:00,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:38:00,428 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1441172198, now seen corresponding path program 1 times [2020-12-22 07:38:00,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:00,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907160176] [2020-12-22 07:38:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:00,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907160176] [2020-12-22 07:38:00,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:00,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:00,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220258899] [2020-12-22 07:38:00,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:00,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:00,493 INFO L87 Difference]: Start difference. First operand 136498 states and 192033 transitions. Second operand 3 states. [2020-12-22 07:38:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:13,754 INFO L93 Difference]: Finished difference Result 272950 states and 384019 transitions. [2020-12-22 07:38:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:13,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:38:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:13,970 INFO L225 Difference]: With dead ends: 272950 [2020-12-22 07:38:13,970 INFO L226 Difference]: Without dead ends: 136500 [2020-12-22 07:38:14,041 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 07:38:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136500 states. [2020-12-22 07:38:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136500 to 136498. [2020-12-22 07:38:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136498 states. [2020-12-22 07:38:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 190385 transitions. [2020-12-22 07:38:27,774 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 190385 transitions. Word has length 112 [2020-12-22 07:38:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:27,775 INFO L481 AbstractCegarLoop]: Abstraction has 136498 states and 190385 transitions. [2020-12-22 07:38:27,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 190385 transitions. [2020-12-22 07:38:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:38:27,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:27,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:27,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:38:27,783 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1528290992, now seen corresponding path program 1 times [2020-12-22 07:38:27,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:27,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210757365] [2020-12-22 07:38:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:27,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210757365] [2020-12-22 07:38:27,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:27,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:27,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387672426] [2020-12-22 07:38:27,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:27,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:27,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:27,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:27,855 INFO L87 Difference]: Start difference. First operand 136498 states and 190385 transitions. Second operand 3 states. [2020-12-22 07:38:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:35,061 INFO L93 Difference]: Finished difference Result 204726 states and 285555 transitions. [2020-12-22 07:38:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:35,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 07:38:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:35,161 INFO L225 Difference]: With dead ends: 204726 [2020-12-22 07:38:35,161 INFO L226 Difference]: Without dead ends: 68276 [2020-12-22 07:38:35,235 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 07:38:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68276 states. [2020-12-22 07:38:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68276 to 68274. [2020-12-22 07:38:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68274 states. [2020-12-22 07:38:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68274 states to 68274 states and 94393 transitions. [2020-12-22 07:38:41,934 INFO L78 Accepts]: Start accepts. Automaton has 68274 states and 94393 transitions. Word has length 112 [2020-12-22 07:38:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:41,935 INFO L481 AbstractCegarLoop]: Abstraction has 68274 states and 94393 transitions. [2020-12-22 07:38:41,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 68274 states and 94393 transitions. [2020-12-22 07:38:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:38:41,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:41,941 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:41,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:38:41,941 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1647401094, now seen corresponding path program 1 times [2020-12-22 07:38:41,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:41,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529105246] [2020-12-22 07:38:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:42,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529105246] [2020-12-22 07:38:42,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622463208] [2020-12-22 07:38:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:38:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:42,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 07:38:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:38:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:38:42,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:38:42,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2020-12-22 07:38:42,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121823988] [2020-12-22 07:38:42,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:38:42,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:42,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:38:42,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:38:42,744 INFO L87 Difference]: Start difference. First operand 68274 states and 94393 transitions. Second operand 14 states.