/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem12_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:29:36,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:29:36,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:29:36,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:29:36,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:29:36,668 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:29:36,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:29:36,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:29:36,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:29:36,672 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:29:36,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:29:36,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:29:36,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:29:36,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:29:36,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:29:36,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:29:36,674 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:29:36,674 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:29:36,674 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:29:36,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:29:36,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:29:36,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:29:36,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:29:36,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:29:36,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:29:36,676 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:29:36,676 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:29:36,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:29:36,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:29:36,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:29:36,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:29:37,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:29:37,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:29:37,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:29:37,230 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:29:37,231 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:29:37,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label38.c [2020-12-22 01:29:37,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46b4a6655/231f935babf5459c91880f7e0faa69ef/FLAG145bfaa99 [2020-12-22 01:29:38,517 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:29:38,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label38.c [2020-12-22 01:29:38,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46b4a6655/231f935babf5459c91880f7e0faa69ef/FLAG145bfaa99 [2020-12-22 01:29:38,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46b4a6655/231f935babf5459c91880f7e0faa69ef [2020-12-22 01:29:38,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:29:38,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:29:38,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:29:38,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:29:38,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:29:38,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:29:38" (1/1) ... [2020-12-22 01:29:38,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34229976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:38, skipping insertion in model container [2020-12-22 01:29:38,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:29:38" (1/1) ... [2020-12-22 01:29:38,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:29:39,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:29:39,485 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label38.c[3304,3317] [2020-12-22 01:29:40,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:29:40,777 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:29:40,801 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label38.c[3304,3317] [2020-12-22 01:29:41,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:29:41,685 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:29:41,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41 WrapperNode [2020-12-22 01:29:41,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:29:41,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:29:41,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:29:41,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:29:41,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:41,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:42,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:29:42,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:29:42,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:29:42,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:29:42,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:42,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:42,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:42,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:42,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:42,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:42,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... [2020-12-22 01:29:42,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:29:42,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:29:42,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:29:42,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:29:42,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:29:42,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:29:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:29:42,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:29:42,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:29:48,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:29:48,040 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:29:48,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:29:48 BoogieIcfgContainer [2020-12-22 01:29:48,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:29:48,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:29:48,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:29:48,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:29:48,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:29:38" (1/3) ... [2020-12-22 01:29:48,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548cff02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:29:48, skipping insertion in model container [2020-12-22 01:29:48,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:29:41" (2/3) ... [2020-12-22 01:29:48,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548cff02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:29:48, skipping insertion in model container [2020-12-22 01:29:48,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:29:48" (3/3) ... [2020-12-22 01:29:48,054 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label38.c [2020-12-22 01:29:48,061 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:29:48,067 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:29:48,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:29:48,123 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:29:48,124 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:29:48,124 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:29:48,124 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:29:48,124 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:29:48,124 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:29:48,125 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:29:48,125 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:29:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2020-12-22 01:29:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 01:29:48,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:29:48,166 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] [2020-12-22 01:29:48,166 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:29:48,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:29:48,173 INFO L82 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2020-12-22 01:29:48,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:29:48,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166783739] [2020-12-22 01:29:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:29:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:29:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:29:48,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166783739] [2020-12-22 01:29:48,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:29:48,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:29:48,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881540259] [2020-12-22 01:29:48,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:29:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:29:48,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:29:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:29:48,566 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 3 states. [2020-12-22 01:29:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:29:54,626 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2020-12-22 01:29:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:29:54,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 01:29:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:29:54,677 INFO L225 Difference]: With dead ends: 2388 [2020-12-22 01:29:54,677 INFO L226 Difference]: Without dead ends: 1506 [2020-12-22 01:29:54,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:29:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2020-12-22 01:29:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2020-12-22 01:29:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-12-22 01:29:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2020-12-22 01:29:54,853 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 24 [2020-12-22 01:29:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:29:54,854 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2020-12-22 01:29:54,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:29:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2020-12-22 01:29:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 01:29:54,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:29:54,863 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:29:54,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:29:54,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:29:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:29:54,867 INFO L82 PathProgramCache]: Analyzing trace with hash 317329089, now seen corresponding path program 1 times [2020-12-22 01:29:54,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:29:54,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998754743] [2020-12-22 01:29:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:29:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:29:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:29:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998754743] [2020-12-22 01:29:55,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555146979] [2020-12-22 01:29:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:29:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:29:55,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:29:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:29:55,581 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 01:29:55,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:29:55,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 01:29:55,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223504543] [2020-12-22 01:29:55,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:29:55,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:29:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:29:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:29:55,589 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand 3 states. [2020-12-22 01:30:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:01,652 INFO L93 Difference]: Finished difference Result 4512 states and 7393 transitions. [2020-12-22 01:30:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:30:01,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 01:30:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:01,671 INFO L225 Difference]: With dead ends: 4512 [2020-12-22 01:30:01,671 INFO L226 Difference]: Without dead ends: 3008 [2020-12-22 01:30:01,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:30:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2020-12-22 01:30:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2020-12-22 01:30:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2020-12-22 01:30:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4286 transitions. [2020-12-22 01:30:01,753 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4286 transitions. Word has length 95 [2020-12-22 01:30:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:01,754 INFO L481 AbstractCegarLoop]: Abstraction has 3008 states and 4286 transitions. [2020-12-22 01:30:01,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:30:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4286 transitions. [2020-12-22 01:30:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 01:30:01,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:01,756 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:01,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 01:30:01,972 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:01,974 INFO L82 PathProgramCache]: Analyzing trace with hash -99887689, now seen corresponding path program 1 times [2020-12-22 01:30:01,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:01,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805733693] [2020-12-22 01:30:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:02,131 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 01:30:02,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805733693] [2020-12-22 01:30:02,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:30:02,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:30:02,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980368206] [2020-12-22 01:30:02,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:30:02,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:30:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:02,140 INFO L87 Difference]: Start difference. First operand 3008 states and 4286 transitions. Second operand 3 states. [2020-12-22 01:30:08,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:08,069 INFO L93 Difference]: Finished difference Result 9018 states and 12853 transitions. [2020-12-22 01:30:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:30:08,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-12-22 01:30:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:08,107 INFO L225 Difference]: With dead ends: 9018 [2020-12-22 01:30:08,108 INFO L226 Difference]: Without dead ends: 6012 [2020-12-22 01:30:08,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2020-12-22 01:30:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6012. [2020-12-22 01:30:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6012 states. [2020-12-22 01:30:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7783 transitions. [2020-12-22 01:30:08,263 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7783 transitions. Word has length 99 [2020-12-22 01:30:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:08,265 INFO L481 AbstractCegarLoop]: Abstraction has 6012 states and 7783 transitions. [2020-12-22 01:30:08,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:30:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7783 transitions. [2020-12-22 01:30:08,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 01:30:08,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:08,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:08,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:30:08,276 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:08,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1252232744, now seen corresponding path program 1 times [2020-12-22 01:30:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:08,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439647620] [2020-12-22 01:30:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:08,455 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 01:30:08,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439647620] [2020-12-22 01:30:08,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:30:08,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:30:08,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333014197] [2020-12-22 01:30:08,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:30:08,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:08,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:30:08,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:08,463 INFO L87 Difference]: Start difference. First operand 6012 states and 7783 transitions. Second operand 3 states. [2020-12-22 01:30:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:14,821 INFO L93 Difference]: Finished difference Result 18032 states and 23345 transitions. [2020-12-22 01:30:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:30:14,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 105 [2020-12-22 01:30:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:14,882 INFO L225 Difference]: With dead ends: 18032 [2020-12-22 01:30:14,883 INFO L226 Difference]: Without dead ends: 12022 [2020-12-22 01:30:14,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12022 states. [2020-12-22 01:30:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12022 to 11269. [2020-12-22 01:30:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11269 states. [2020-12-22 01:30:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13834 transitions. [2020-12-22 01:30:15,141 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13834 transitions. Word has length 105 [2020-12-22 01:30:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:15,144 INFO L481 AbstractCegarLoop]: Abstraction has 11269 states and 13834 transitions. [2020-12-22 01:30:15,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:30:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13834 transitions. [2020-12-22 01:30:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 01:30:15,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:15,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:15,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:30:15,157 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash -240071482, now seen corresponding path program 1 times [2020-12-22 01:30:15,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:15,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666148629] [2020-12-22 01:30:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:15,743 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 01:30:15,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666148629] [2020-12-22 01:30:15,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:30:15,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 01:30:15,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376824235] [2020-12-22 01:30:15,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 01:30:15,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 01:30:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:30:15,750 INFO L87 Difference]: Start difference. First operand 11269 states and 13834 transitions. Second operand 5 states. [2020-12-22 01:30:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:29,106 INFO L93 Difference]: Finished difference Result 29295 states and 35079 transitions. [2020-12-22 01:30:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 01:30:29,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-12-22 01:30:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:29,174 INFO L225 Difference]: With dead ends: 29295 [2020-12-22 01:30:29,174 INFO L226 Difference]: Without dead ends: 18028 [2020-12-22 01:30:29,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:30:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18028 states. [2020-12-22 01:30:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18028 to 16526. [2020-12-22 01:30:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16526 states. [2020-12-22 01:30:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16526 states to 16526 states and 19409 transitions. [2020-12-22 01:30:29,462 INFO L78 Accepts]: Start accepts. Automaton has 16526 states and 19409 transitions. Word has length 168 [2020-12-22 01:30:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:29,462 INFO L481 AbstractCegarLoop]: Abstraction has 16526 states and 19409 transitions. [2020-12-22 01:30:29,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 01:30:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 16526 states and 19409 transitions. [2020-12-22 01:30:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-12-22 01:30:29,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:29,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:29,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:30:29,467 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:29,467 INFO L82 PathProgramCache]: Analyzing trace with hash -91050859, now seen corresponding path program 1 times [2020-12-22 01:30:29,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:29,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920444999] [2020-12-22 01:30:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:30:29,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920444999] [2020-12-22 01:30:29,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:30:29,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:30:29,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302037292] [2020-12-22 01:30:29,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:30:29,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:29,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:30:29,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:30:29,847 INFO L87 Difference]: Start difference. First operand 16526 states and 19409 transitions. Second operand 4 states. [2020-12-22 01:30:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:36,890 INFO L93 Difference]: Finished difference Result 37593 states and 43653 transitions. [2020-12-22 01:30:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:30:36,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 239 [2020-12-22 01:30:36,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:36,940 INFO L225 Difference]: With dead ends: 37593 [2020-12-22 01:30:36,940 INFO L226 Difference]: Without dead ends: 21032 [2020-12-22 01:30:36,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:30:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2020-12-22 01:30:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 21032. [2020-12-22 01:30:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21032 states. [2020-12-22 01:30:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21032 states to 21032 states and 23987 transitions. [2020-12-22 01:30:37,329 INFO L78 Accepts]: Start accepts. Automaton has 21032 states and 23987 transitions. Word has length 239 [2020-12-22 01:30:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:37,329 INFO L481 AbstractCegarLoop]: Abstraction has 21032 states and 23987 transitions. [2020-12-22 01:30:37,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:30:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 21032 states and 23987 transitions. [2020-12-22 01:30:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-22 01:30:37,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:37,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:37,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:30:37,339 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash 978903934, now seen corresponding path program 1 times [2020-12-22 01:30:37,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:37,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292828461] [2020-12-22 01:30:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:30:37,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292828461] [2020-12-22 01:30:37,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:30:37,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:30:37,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583362604] [2020-12-22 01:30:37,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:30:37,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:37,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:30:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:37,574 INFO L87 Difference]: Start difference. First operand 21032 states and 23987 transitions. Second operand 3 states. [2020-12-22 01:30:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:45,969 INFO L93 Difference]: Finished difference Result 60086 states and 68807 transitions. [2020-12-22 01:30:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:30:45,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 250 [2020-12-22 01:30:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:46,051 INFO L225 Difference]: With dead ends: 60086 [2020-12-22 01:30:46,052 INFO L226 Difference]: Without dead ends: 39056 [2020-12-22 01:30:46,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39056 states. [2020-12-22 01:30:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39056 to 35301. [2020-12-22 01:30:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35301 states. [2020-12-22 01:30:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 40149 transitions. [2020-12-22 01:30:46,630 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 40149 transitions. Word has length 250 [2020-12-22 01:30:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:46,631 INFO L481 AbstractCegarLoop]: Abstraction has 35301 states and 40149 transitions. [2020-12-22 01:30:46,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:30:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 40149 transitions. [2020-12-22 01:30:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-22 01:30:46,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:46,636 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:46,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:30:46,636 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:46,637 INFO L82 PathProgramCache]: Analyzing trace with hash -500495800, now seen corresponding path program 1 times [2020-12-22 01:30:46,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:46,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315926010] [2020-12-22 01:30:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-22 01:30:47,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315926010] [2020-12-22 01:30:47,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:30:47,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:30:47,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126700390] [2020-12-22 01:30:47,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:30:47,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:47,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:30:47,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:47,224 INFO L87 Difference]: Start difference. First operand 35301 states and 40149 transitions. Second operand 3 states. [2020-12-22 01:30:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:30:54,958 INFO L93 Difference]: Finished difference Result 88624 states and 101870 transitions. [2020-12-22 01:30:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:30:54,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-12-22 01:30:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:30:55,071 INFO L225 Difference]: With dead ends: 88624 [2020-12-22 01:30:55,072 INFO L226 Difference]: Without dead ends: 53325 [2020-12-22 01:30:55,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53325 states. [2020-12-22 01:30:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53325 to 53325. [2020-12-22 01:30:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53325 states. [2020-12-22 01:30:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53325 states to 53325 states and 59292 transitions. [2020-12-22 01:30:56,294 INFO L78 Accepts]: Start accepts. Automaton has 53325 states and 59292 transitions. Word has length 254 [2020-12-22 01:30:56,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:30:56,312 INFO L481 AbstractCegarLoop]: Abstraction has 53325 states and 59292 transitions. [2020-12-22 01:30:56,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:30:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 53325 states and 59292 transitions. [2020-12-22 01:30:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-12-22 01:30:56,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:30:56,329 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:30:56,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:30:56,329 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:30:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:30:56,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1062065562, now seen corresponding path program 1 times [2020-12-22 01:30:56,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:30:56,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272696810] [2020-12-22 01:30:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:30:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:30:56,728 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2020-12-22 01:30:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-22 01:30:56,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272696810] [2020-12-22 01:30:56,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:30:56,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:30:56,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736611394] [2020-12-22 01:30:56,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:30:56,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:30:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:30:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:30:56,826 INFO L87 Difference]: Start difference. First operand 53325 states and 59292 transitions. Second operand 3 states. [2020-12-22 01:31:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:31:04,820 INFO L93 Difference]: Finished difference Result 118664 states and 131536 transitions. [2020-12-22 01:31:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:31:04,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 309 [2020-12-22 01:31:04,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:31:04,921 INFO L225 Difference]: With dead ends: 118664 [2020-12-22 01:31:04,921 INFO L226 Difference]: Without dead ends: 63839 [2020-12-22 01:31:04,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63839 states. [2020-12-22 01:31:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63839 to 60835. [2020-12-22 01:31:06,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60835 states. [2020-12-22 01:31:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60835 states to 60835 states and 66537 transitions. [2020-12-22 01:31:06,092 INFO L78 Accepts]: Start accepts. Automaton has 60835 states and 66537 transitions. Word has length 309 [2020-12-22 01:31:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:31:06,092 INFO L481 AbstractCegarLoop]: Abstraction has 60835 states and 66537 transitions. [2020-12-22 01:31:06,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:31:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 60835 states and 66537 transitions. [2020-12-22 01:31:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-12-22 01:31:06,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:06,110 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:31:06,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:31:06,110 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash -389450428, now seen corresponding path program 1 times [2020-12-22 01:31:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:06,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331139644] [2020-12-22 01:31:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 01:31:06,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331139644] [2020-12-22 01:31:06,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:31:06,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:31:06,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409258768] [2020-12-22 01:31:06,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:31:06,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:06,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:31:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:06,877 INFO L87 Difference]: Start difference. First operand 60835 states and 66537 transitions. Second operand 3 states. [2020-12-22 01:31:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:31:16,281 INFO L93 Difference]: Finished difference Result 141196 states and 156148 transitions. [2020-12-22 01:31:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:31:16,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 438 [2020-12-22 01:31:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:31:16,378 INFO L225 Difference]: With dead ends: 141196 [2020-12-22 01:31:16,378 INFO L226 Difference]: Without dead ends: 80363 [2020-12-22 01:31:16,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80363 states. [2020-12-22 01:31:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80363 to 79610. [2020-12-22 01:31:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79610 states. [2020-12-22 01:31:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79610 states to 79610 states and 87492 transitions. [2020-12-22 01:31:17,803 INFO L78 Accepts]: Start accepts. Automaton has 79610 states and 87492 transitions. Word has length 438 [2020-12-22 01:31:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:31:17,804 INFO L481 AbstractCegarLoop]: Abstraction has 79610 states and 87492 transitions. [2020-12-22 01:31:17,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:31:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 79610 states and 87492 transitions. [2020-12-22 01:31:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-12-22 01:31:17,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:17,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:31:17,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:31:17,822 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 490250510, now seen corresponding path program 1 times [2020-12-22 01:31:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:17,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496557467] [2020-12-22 01:31:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 322 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:31:18,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496557467] [2020-12-22 01:31:18,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576954457] [2020-12-22 01:31:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:31:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:31:19,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:31:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 01:31:20,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:31:20,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 01:31:20,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994844336] [2020-12-22 01:31:20,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:31:20,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:20,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:31:20,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:31:20,044 INFO L87 Difference]: Start difference. First operand 79610 states and 87492 transitions. Second operand 3 states. [2020-12-22 01:31:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:31:30,260 INFO L93 Difference]: Finished difference Result 187005 states and 206866 transitions. [2020-12-22 01:31:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:31:30,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 442 [2020-12-22 01:31:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:31:30,415 INFO L225 Difference]: With dead ends: 187005 [2020-12-22 01:31:30,416 INFO L226 Difference]: Without dead ends: 107397 [2020-12-22 01:31:30,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:31:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107397 states. [2020-12-22 01:31:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107397 to 105144. [2020-12-22 01:31:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105144 states. [2020-12-22 01:31:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105144 states to 105144 states and 115900 transitions. [2020-12-22 01:31:32,505 INFO L78 Accepts]: Start accepts. Automaton has 105144 states and 115900 transitions. Word has length 442 [2020-12-22 01:31:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:31:32,505 INFO L481 AbstractCegarLoop]: Abstraction has 105144 states and 115900 transitions. [2020-12-22 01:31:32,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:31:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 105144 states and 115900 transitions. [2020-12-22 01:31:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-12-22 01:31:32,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:32,518 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:31:32,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:31:32,732 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:32,733 INFO L82 PathProgramCache]: Analyzing trace with hash 296221119, now seen corresponding path program 1 times [2020-12-22 01:31:32,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:32,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312727573] [2020-12-22 01:31:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 106 proven. 229 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-22 01:31:33,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312727573] [2020-12-22 01:31:33,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473746341] [2020-12-22 01:31:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:31:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:31:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:31:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-12-22 01:31:34,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:31:34,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 01:31:34,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760946165] [2020-12-22 01:31:34,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:31:34,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:34,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:31:34,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:31:34,881 INFO L87 Difference]: Start difference. First operand 105144 states and 115900 transitions. Second operand 3 states. [2020-12-22 01:31:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:31:46,203 INFO L93 Difference]: Finished difference Result 227559 states and 253116 transitions. [2020-12-22 01:31:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:31:46,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 448 [2020-12-22 01:31:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:31:46,349 INFO L225 Difference]: With dead ends: 227559 [2020-12-22 01:31:46,349 INFO L226 Difference]: Without dead ends: 122417 [2020-12-22 01:31:46,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:31:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122417 states. [2020-12-22 01:31:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122417 to 122417. [2020-12-22 01:31:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122417 states. [2020-12-22 01:31:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122417 states to 122417 states and 135934 transitions. [2020-12-22 01:31:48,369 INFO L78 Accepts]: Start accepts. Automaton has 122417 states and 135934 transitions. Word has length 448 [2020-12-22 01:31:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:31:48,370 INFO L481 AbstractCegarLoop]: Abstraction has 122417 states and 135934 transitions. [2020-12-22 01:31:48,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:31:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 122417 states and 135934 transitions. [2020-12-22 01:31:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-12-22 01:31:48,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:31:48,382 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 01:31:48,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 01:31:48,583 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:31:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:31:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2061470705, now seen corresponding path program 1 times [2020-12-22 01:31:48,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:31:48,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119233266] [2020-12-22 01:31:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:31:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:31:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 349 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-22 01:31:49,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119233266] [2020-12-22 01:31:49,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:31:49,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:31:49,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52412784] [2020-12-22 01:31:49,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:31:49,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:31:49,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:31:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:31:49,506 INFO L87 Difference]: Start difference. First operand 122417 states and 135934 transitions. Second operand 3 states. [2020-12-22 01:32:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:00,798 INFO L93 Difference]: Finished difference Result 283884 states and 316907 transitions. [2020-12-22 01:32:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:32:00,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-12-22 01:32:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:01,128 INFO L225 Difference]: With dead ends: 283884 [2020-12-22 01:32:01,129 INFO L226 Difference]: Without dead ends: 161469 [2020-12-22 01:32:01,243 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 01:32:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161469 states. [2020-12-22 01:32:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161469 to 152457. [2020-12-22 01:32:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152457 states. [2020-12-22 01:32:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152457 states to 152457 states and 167469 transitions. [2020-12-22 01:32:03,929 INFO L78 Accepts]: Start accepts. Automaton has 152457 states and 167469 transitions. Word has length 495 [2020-12-22 01:32:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:03,930 INFO L481 AbstractCegarLoop]: Abstraction has 152457 states and 167469 transitions. [2020-12-22 01:32:03,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:32:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 152457 states and 167469 transitions. [2020-12-22 01:32:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2020-12-22 01:32:03,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:03,952 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:03,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:32:03,953 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:03,960 INFO L82 PathProgramCache]: Analyzing trace with hash 237681513, now seen corresponding path program 1 times [2020-12-22 01:32:03,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:03,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013098099] [2020-12-22 01:32:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 489 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-12-22 01:32:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013098099] [2020-12-22 01:32:04,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:04,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:04,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528994224] [2020-12-22 01:32:04,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:32:04,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:04,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:32:04,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:04,828 INFO L87 Difference]: Start difference. First operand 152457 states and 167469 transitions. Second operand 3 states. [2020-12-22 01:32:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:17,320 INFO L93 Difference]: Finished difference Result 328944 states and 361935 transitions. [2020-12-22 01:32:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:32:17,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 528 [2020-12-22 01:32:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:17,876 INFO L225 Difference]: With dead ends: 328944 [2020-12-22 01:32:17,876 INFO L226 Difference]: Without dead ends: 176489 [2020-12-22 01:32:17,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176489 states. [2020-12-22 01:32:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176489 to 152457. [2020-12-22 01:32:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152457 states. [2020-12-22 01:32:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152457 states to 152457 states and 167469 transitions. [2020-12-22 01:32:21,051 INFO L78 Accepts]: Start accepts. Automaton has 152457 states and 167469 transitions. Word has length 528 [2020-12-22 01:32:21,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:21,051 INFO L481 AbstractCegarLoop]: Abstraction has 152457 states and 167469 transitions. [2020-12-22 01:32:21,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:32:21,052 INFO L276 IsEmpty]: Start isEmpty. Operand 152457 states and 167469 transitions. [2020-12-22 01:32:21,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2020-12-22 01:32:21,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:21,073 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:21,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 01:32:21,073 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash 33789845, now seen corresponding path program 1 times [2020-12-22 01:32:21,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:21,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930497829] [2020-12-22 01:32:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-12-22 01:32:22,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930497829] [2020-12-22 01:32:22,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:22,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:22,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806612379] [2020-12-22 01:32:22,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:32:22,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:22,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:32:22,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:22,066 INFO L87 Difference]: Start difference. First operand 152457 states and 167469 transitions. Second operand 3 states. [2020-12-22 01:32:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:35,386 INFO L93 Difference]: Finished difference Result 339458 states and 374192 transitions. [2020-12-22 01:32:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:32:35,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 540 [2020-12-22 01:32:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:35,712 INFO L225 Difference]: With dead ends: 339458 [2020-12-22 01:32:35,712 INFO L226 Difference]: Without dead ends: 187003 [2020-12-22 01:32:35,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187003 states. [2020-12-22 01:32:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187003 to 180244. [2020-12-22 01:32:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180244 states. [2020-12-22 01:32:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180244 states to 180244 states and 197028 transitions. [2020-12-22 01:32:39,172 INFO L78 Accepts]: Start accepts. Automaton has 180244 states and 197028 transitions. Word has length 540 [2020-12-22 01:32:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:39,173 INFO L481 AbstractCegarLoop]: Abstraction has 180244 states and 197028 transitions. [2020-12-22 01:32:39,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:32:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 180244 states and 197028 transitions. [2020-12-22 01:32:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-12-22 01:32:39,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:39,195 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:39,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 01:32:39,195 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash -843995451, now seen corresponding path program 1 times [2020-12-22 01:32:39,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:39,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201856655] [2020-12-22 01:32:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2020-12-22 01:32:40,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201856655] [2020-12-22 01:32:40,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:40,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:32:40,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427588186] [2020-12-22 01:32:40,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:32:40,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:32:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:40,147 INFO L87 Difference]: Start difference. First operand 180244 states and 197028 transitions. Second operand 3 states. [2020-12-22 01:32:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:32:53,214 INFO L93 Difference]: Finished difference Result 362739 states and 396212 transitions. [2020-12-22 01:32:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:32:53,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 586 [2020-12-22 01:32:53,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:32:53,559 INFO L225 Difference]: With dead ends: 362739 [2020-12-22 01:32:53,560 INFO L226 Difference]: Without dead ends: 176489 [2020-12-22 01:32:53,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:32:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176489 states. [2020-12-22 01:32:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176489 to 157714. [2020-12-22 01:32:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157714 states. [2020-12-22 01:32:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157714 states to 157714 states and 167406 transitions. [2020-12-22 01:32:57,030 INFO L78 Accepts]: Start accepts. Automaton has 157714 states and 167406 transitions. Word has length 586 [2020-12-22 01:32:57,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:32:57,031 INFO L481 AbstractCegarLoop]: Abstraction has 157714 states and 167406 transitions. [2020-12-22 01:32:57,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:32:57,031 INFO L276 IsEmpty]: Start isEmpty. Operand 157714 states and 167406 transitions. [2020-12-22 01:32:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2020-12-22 01:32:57,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:32:57,073 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:32:57,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 01:32:57,076 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:32:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:32:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1160208523, now seen corresponding path program 1 times [2020-12-22 01:32:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:32:57,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371771488] [2020-12-22 01:32:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:32:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:32:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 684 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-22 01:32:57,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371771488] [2020-12-22 01:32:57,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:32:57,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 01:32:57,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234478322] [2020-12-22 01:32:57,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 01:32:57,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:32:57,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 01:32:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:32:57,978 INFO L87 Difference]: Start difference. First operand 157714 states and 167406 transitions. Second operand 5 states. [2020-12-22 01:33:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:33:15,561 INFO L93 Difference]: Finished difference Result 343498 states and 365767 transitions. [2020-12-22 01:33:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:33:15,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 601 [2020-12-22 01:33:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:33:15,850 INFO L225 Difference]: With dead ends: 343498 [2020-12-22 01:33:15,850 INFO L226 Difference]: Without dead ends: 186537 [2020-12-22 01:33:15,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:33:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186537 states. [2020-12-22 01:33:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186537 to 179493. [2020-12-22 01:33:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179493 states.