/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/Problem17_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:30:56,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:30:56,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:30:56,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:30:56,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:30:56,755 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:30:56,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:30:56,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:30:56,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:30:56,759 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:30:56,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:30:56,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:30:56,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:30:56,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:30:56,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:30:56,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:30:56,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:30:56,761 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:30:56,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:30:56,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:30:56,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:30:56,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:30:56,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:30:56,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:30:56,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:30:56,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:30:56,763 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:30:56,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:30:56,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:30:56,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:30:56,764 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:30:57,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:30:57,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:30:57,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:30:57,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:30:57,270 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:30:57,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label39.c [2020-12-22 02:30:57,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168051319/a1c9f58aef0b4197857d9220661522fd/FLAGffe27de98 [2020-12-22 02:30:58,516 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:30:58,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label39.c [2020-12-22 02:30:58,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168051319/a1c9f58aef0b4197857d9220661522fd/FLAGffe27de98 [2020-12-22 02:30:59,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/168051319/a1c9f58aef0b4197857d9220661522fd [2020-12-22 02:30:59,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:30:59,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:30:59,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:30:59,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:30:59,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:30:59,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:30:59" (1/1) ... [2020-12-22 02:30:59,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f759fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:30:59, skipping insertion in model container [2020-12-22 02:30:59,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:30:59" (1/1) ... [2020-12-22 02:30:59,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:30:59,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:30:59,535 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/Problem17_label39.c[9366,9379] [2020-12-22 02:31:00,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:31:00,258 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:31:00,293 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/Problem17_label39.c[9366,9379] [2020-12-22 02:31:00,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:31:00,745 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:31:00,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00 WrapperNode [2020-12-22 02:31:00,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:31:00,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:31:00,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:31:00,749 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:31:00,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:00,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:01,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:31:01,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:31:01,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:31:01,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:31:01,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:01,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:01,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:01,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:01,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:01,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:01,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (1/1) ... [2020-12-22 02:31:01,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:31:01,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:31:01,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:31:01,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:31:01,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (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 02:31:01,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:31:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:31:01,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:31:01,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:31:06,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:31:06,866 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:31:06,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:31:06 BoogieIcfgContainer [2020-12-22 02:31:06,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:31:06,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:31:06,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:31:06,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:31:06,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:30:59" (1/3) ... [2020-12-22 02:31:06,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2005648c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:31:06, skipping insertion in model container [2020-12-22 02:31:06,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:31:00" (2/3) ... [2020-12-22 02:31:06,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2005648c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:31:06, skipping insertion in model container [2020-12-22 02:31:06,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:31:06" (3/3) ... [2020-12-22 02:31:06,879 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label39.c [2020-12-22 02:31:06,886 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:31:06,893 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:31:06,913 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:31:06,957 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:31:06,957 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:31:06,957 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:31:06,957 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:31:06,957 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:31:06,958 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:31:06,958 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:31:06,958 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:31:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2020-12-22 02:31:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 02:31:06,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:06,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:31:07,000 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:07,007 INFO L82 PathProgramCache]: Analyzing trace with hash -696204111, now seen corresponding path program 1 times [2020-12-22 02:31:07,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:07,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948924393] [2020-12-22 02:31:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:07,470 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 02:31:07,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948924393] [2020-12-22 02:31:07,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:07,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:31:07,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32061732] [2020-12-22 02:31:07,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:07,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:07,506 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 3 states. [2020-12-22 02:31:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:13,093 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2020-12-22 02:31:13,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:13,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 02:31:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:13,137 INFO L225 Difference]: With dead ends: 1680 [2020-12-22 02:31:13,137 INFO L226 Difference]: Without dead ends: 1011 [2020-12-22 02:31:13,150 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 02:31:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2020-12-22 02:31:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2020-12-22 02:31:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 996 states. [2020-12-22 02:31:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2020-12-22 02:31:13,309 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 63 [2020-12-22 02:31:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:13,311 INFO L481 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2020-12-22 02:31:13,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2020-12-22 02:31:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 02:31:13,318 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:13,319 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:31:13,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:31:13,320 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1285088309, now seen corresponding path program 1 times [2020-12-22 02:31:13,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:13,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177288092] [2020-12-22 02:31:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:31:13,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177288092] [2020-12-22 02:31:13,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:13,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:31:13,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088647429] [2020-12-22 02:31:13,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:13,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:13,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:13,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:13,644 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand 3 states. [2020-12-22 02:31:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:18,732 INFO L93 Difference]: Finished difference Result 2866 states and 5020 transitions. [2020-12-22 02:31:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:18,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 128 [2020-12-22 02:31:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:18,748 INFO L225 Difference]: With dead ends: 2866 [2020-12-22 02:31:18,748 INFO L226 Difference]: Without dead ends: 1872 [2020-12-22 02:31:18,752 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 02:31:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2020-12-22 02:31:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1865. [2020-12-22 02:31:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1865 states. [2020-12-22 02:31:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2831 transitions. [2020-12-22 02:31:18,840 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2831 transitions. Word has length 128 [2020-12-22 02:31:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:18,843 INFO L481 AbstractCegarLoop]: Abstraction has 1865 states and 2831 transitions. [2020-12-22 02:31:18,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2831 transitions. [2020-12-22 02:31:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 02:31:18,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:18,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:31:18,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:31:18,859 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash 368725530, now seen corresponding path program 1 times [2020-12-22 02:31:18,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:18,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515583757] [2020-12-22 02:31:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:31:19,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515583757] [2020-12-22 02:31:19,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:19,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:31:19,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986431200] [2020-12-22 02:31:19,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:19,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:19,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:19,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:19,167 INFO L87 Difference]: Start difference. First operand 1865 states and 2831 transitions. Second operand 3 states. [2020-12-22 02:31:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:24,222 INFO L93 Difference]: Finished difference Result 5459 states and 8311 transitions. [2020-12-22 02:31:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:24,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-12-22 02:31:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:24,244 INFO L225 Difference]: With dead ends: 5459 [2020-12-22 02:31:24,244 INFO L226 Difference]: Without dead ends: 3596 [2020-12-22 02:31:24,249 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 02:31:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-12-22 02:31:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3164. [2020-12-22 02:31:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3164 states. [2020-12-22 02:31:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 4304 transitions. [2020-12-22 02:31:24,333 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 4304 transitions. Word has length 130 [2020-12-22 02:31:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:24,342 INFO L481 AbstractCegarLoop]: Abstraction has 3164 states and 4304 transitions. [2020-12-22 02:31:24,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 4304 transitions. [2020-12-22 02:31:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 02:31:24,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:24,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:31:24,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:31:24,344 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:24,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1757507228, now seen corresponding path program 1 times [2020-12-22 02:31:24,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:24,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905146636] [2020-12-22 02:31:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:31:24,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905146636] [2020-12-22 02:31:24,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:24,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:31:24,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307096725] [2020-12-22 02:31:24,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:24,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:24,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:24,566 INFO L87 Difference]: Start difference. First operand 3164 states and 4304 transitions. Second operand 3 states. [2020-12-22 02:31:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:28,996 INFO L93 Difference]: Finished difference Result 8042 states and 11145 transitions. [2020-12-22 02:31:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:28,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2020-12-22 02:31:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:29,028 INFO L225 Difference]: With dead ends: 8042 [2020-12-22 02:31:29,028 INFO L226 Difference]: Without dead ends: 4880 [2020-12-22 02:31:29,036 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 02:31:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2020-12-22 02:31:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4877. [2020-12-22 02:31:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4877 states. [2020-12-22 02:31:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 6337 transitions. [2020-12-22 02:31:29,169 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 6337 transitions. Word has length 133 [2020-12-22 02:31:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:29,170 INFO L481 AbstractCegarLoop]: Abstraction has 4877 states and 6337 transitions. [2020-12-22 02:31:29,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 6337 transitions. [2020-12-22 02:31:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-22 02:31:29,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:29,175 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:31:29,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:31:29,176 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:29,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1487706324, now seen corresponding path program 1 times [2020-12-22 02:31:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:29,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381174073] [2020-12-22 02:31:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-22 02:31:29,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381174073] [2020-12-22 02:31:29,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:29,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:31:29,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83175034] [2020-12-22 02:31:29,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:29,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:29,435 INFO L87 Difference]: Start difference. First operand 4877 states and 6337 transitions. Second operand 3 states. [2020-12-22 02:31:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:34,426 INFO L93 Difference]: Finished difference Result 14435 states and 18742 transitions. [2020-12-22 02:31:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:34,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2020-12-22 02:31:34,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:34,469 INFO L225 Difference]: With dead ends: 14435 [2020-12-22 02:31:34,470 INFO L226 Difference]: Without dead ends: 7856 [2020-12-22 02:31:34,482 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 02:31:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7856 states. [2020-12-22 02:31:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7856 to 5728. [2020-12-22 02:31:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5728 states. [2020-12-22 02:31:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5728 states to 5728 states and 6855 transitions. [2020-12-22 02:31:34,676 INFO L78 Accepts]: Start accepts. Automaton has 5728 states and 6855 transitions. Word has length 202 [2020-12-22 02:31:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:34,677 INFO L481 AbstractCegarLoop]: Abstraction has 5728 states and 6855 transitions. [2020-12-22 02:31:34,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5728 states and 6855 transitions. [2020-12-22 02:31:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 02:31:34,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:34,682 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:31:34,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:31:34,683 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:34,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1764789618, now seen corresponding path program 1 times [2020-12-22 02:31:34,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:34,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622631793] [2020-12-22 02:31:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:31:35,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622631793] [2020-12-22 02:31:35,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:35,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:31:35,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549546733] [2020-12-22 02:31:35,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:35,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:35,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:35,027 INFO L87 Difference]: Start difference. First operand 5728 states and 6855 transitions. Second operand 3 states. [2020-12-22 02:31:38,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:38,751 INFO L93 Difference]: Finished difference Result 14852 states and 18032 transitions. [2020-12-22 02:31:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:38,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2020-12-22 02:31:38,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:38,797 INFO L225 Difference]: With dead ends: 14852 [2020-12-22 02:31:38,798 INFO L226 Difference]: Without dead ends: 9126 [2020-12-22 02:31:38,809 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 02:31:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9126 states. [2020-12-22 02:31:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9126 to 9126. [2020-12-22 02:31:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9126 states. [2020-12-22 02:31:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9126 states to 9126 states and 10693 transitions. [2020-12-22 02:31:39,032 INFO L78 Accepts]: Start accepts. Automaton has 9126 states and 10693 transitions. Word has length 215 [2020-12-22 02:31:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:39,033 INFO L481 AbstractCegarLoop]: Abstraction has 9126 states and 10693 transitions. [2020-12-22 02:31:39,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 9126 states and 10693 transitions. [2020-12-22 02:31:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-12-22 02:31:39,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:39,043 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:31:39,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:31:39,044 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 715443249, now seen corresponding path program 1 times [2020-12-22 02:31:39,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:39,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965474309] [2020-12-22 02:31:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 02:31:39,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965474309] [2020-12-22 02:31:39,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:39,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:31:39,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753458129] [2020-12-22 02:31:39,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:39,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:39,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:39,492 INFO L87 Difference]: Start difference. First operand 9126 states and 10693 transitions. Second operand 3 states. [2020-12-22 02:31:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:44,532 INFO L93 Difference]: Finished difference Result 22913 states and 27057 transitions. [2020-12-22 02:31:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:31:44,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 295 [2020-12-22 02:31:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:44,572 INFO L225 Difference]: With dead ends: 22913 [2020-12-22 02:31:44,572 INFO L226 Difference]: Without dead ends: 12939 [2020-12-22 02:31:44,589 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 02:31:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2020-12-22 02:31:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 12939. [2020-12-22 02:31:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12939 states. [2020-12-22 02:31:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12939 states to 12939 states and 14551 transitions. [2020-12-22 02:31:44,890 INFO L78 Accepts]: Start accepts. Automaton has 12939 states and 14551 transitions. Word has length 295 [2020-12-22 02:31:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:44,891 INFO L481 AbstractCegarLoop]: Abstraction has 12939 states and 14551 transitions. [2020-12-22 02:31:44,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:31:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 12939 states and 14551 transitions. [2020-12-22 02:31:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-12-22 02:31:44,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:44,904 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:31:44,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:31:44,905 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:44,906 INFO L82 PathProgramCache]: Analyzing trace with hash 403479436, now seen corresponding path program 1 times [2020-12-22 02:31:44,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:44,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546183208] [2020-12-22 02:31:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:31:45,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546183208] [2020-12-22 02:31:45,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:45,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:31:45,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733051002] [2020-12-22 02:31:45,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:31:45,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:45,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:31:45,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:31:45,448 INFO L87 Difference]: Start difference. First operand 12939 states and 14551 transitions. Second operand 4 states. [2020-12-22 02:31:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:31:53,809 INFO L93 Difference]: Finished difference Result 36564 states and 41396 transitions. [2020-12-22 02:31:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:31:53,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-12-22 02:31:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:31:53,866 INFO L225 Difference]: With dead ends: 36564 [2020-12-22 02:31:53,867 INFO L226 Difference]: Without dead ends: 23627 [2020-12-22 02:31:53,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:31:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23627 states. [2020-12-22 02:31:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23627 to 21483. [2020-12-22 02:31:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21483 states. [2020-12-22 02:31:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21483 states to 21483 states and 24450 transitions. [2020-12-22 02:31:54,297 INFO L78 Accepts]: Start accepts. Automaton has 21483 states and 24450 transitions. Word has length 335 [2020-12-22 02:31:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:31:54,297 INFO L481 AbstractCegarLoop]: Abstraction has 21483 states and 24450 transitions. [2020-12-22 02:31:54,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:31:54,298 INFO L276 IsEmpty]: Start isEmpty. Operand 21483 states and 24450 transitions. [2020-12-22 02:31:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-12-22 02:31:54,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:31:54,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:31:54,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:31:54,311 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:31:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:31:54,312 INFO L82 PathProgramCache]: Analyzing trace with hash 995930622, now seen corresponding path program 1 times [2020-12-22 02:31:54,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:31:54,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74239649] [2020-12-22 02:31:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:31:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:31:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:31:54,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74239649] [2020-12-22 02:31:54,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:31:54,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:31:54,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062446146] [2020-12-22 02:31:54,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:31:54,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:31:54,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:31:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:31:54,722 INFO L87 Difference]: Start difference. First operand 21483 states and 24450 transitions. Second operand 3 states. [2020-12-22 02:32:00,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:00,127 INFO L93 Difference]: Finished difference Result 48482 states and 55242 transitions. [2020-12-22 02:32:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:00,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 358 [2020-12-22 02:32:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:00,225 INFO L225 Difference]: With dead ends: 48482 [2020-12-22 02:32:00,225 INFO L226 Difference]: Without dead ends: 27000 [2020-12-22 02:32:00,267 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 02:32:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27000 states. [2020-12-22 02:32:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27000 to 21443. [2020-12-22 02:32:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21443 states. [2020-12-22 02:32:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21443 states to 21443 states and 24173 transitions. [2020-12-22 02:32:00,963 INFO L78 Accepts]: Start accepts. Automaton has 21443 states and 24173 transitions. Word has length 358 [2020-12-22 02:32:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:00,964 INFO L481 AbstractCegarLoop]: Abstraction has 21443 states and 24173 transitions. [2020-12-22 02:32:00,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 21443 states and 24173 transitions. [2020-12-22 02:32:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-12-22 02:32:00,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:00,982 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:32:00,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:32:00,982 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:00,983 INFO L82 PathProgramCache]: Analyzing trace with hash 56522163, now seen corresponding path program 1 times [2020-12-22 02:32:00,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:00,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102104417] [2020-12-22 02:32:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-12-22 02:32:01,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102104417] [2020-12-22 02:32:01,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:01,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:32:01,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832331533] [2020-12-22 02:32:01,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:01,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:01,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:01,409 INFO L87 Difference]: Start difference. First operand 21443 states and 24173 transitions. Second operand 3 states. [2020-12-22 02:32:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:04,572 INFO L93 Difference]: Finished difference Result 42446 states and 47879 transitions. [2020-12-22 02:32:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:04,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2020-12-22 02:32:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:04,613 INFO L225 Difference]: With dead ends: 42446 [2020-12-22 02:32:04,613 INFO L226 Difference]: Without dead ends: 21005 [2020-12-22 02:32:04,630 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 02:32:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21005 states. [2020-12-22 02:32:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21005 to 20151. [2020-12-22 02:32:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20151 states. [2020-12-22 02:32:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20151 states to 20151 states and 22762 transitions. [2020-12-22 02:32:05,014 INFO L78 Accepts]: Start accepts. Automaton has 20151 states and 22762 transitions. Word has length 361 [2020-12-22 02:32:05,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:05,015 INFO L481 AbstractCegarLoop]: Abstraction has 20151 states and 22762 transitions. [2020-12-22 02:32:05,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 20151 states and 22762 transitions. [2020-12-22 02:32:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-12-22 02:32:05,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:05,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:32:05,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:32:05,028 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:05,028 INFO L82 PathProgramCache]: Analyzing trace with hash -352479738, now seen corresponding path program 1 times [2020-12-22 02:32:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:05,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919586377] [2020-12-22 02:32:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 02:32:05,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919586377] [2020-12-22 02:32:05,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:05,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:32:05,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320069363] [2020-12-22 02:32:05,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:05,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:05,372 INFO L87 Difference]: Start difference. First operand 20151 states and 22762 transitions. Second operand 3 states. [2020-12-22 02:32:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:10,811 INFO L93 Difference]: Finished difference Result 47121 states and 53259 transitions. [2020-12-22 02:32:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:10,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 378 [2020-12-22 02:32:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:10,848 INFO L225 Difference]: With dead ends: 47121 [2020-12-22 02:32:10,849 INFO L226 Difference]: Without dead ends: 26972 [2020-12-22 02:32:10,865 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 02:32:10,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26972 states. [2020-12-22 02:32:11,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26972 to 17576. [2020-12-22 02:32:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17576 states. [2020-12-22 02:32:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17576 states to 17576 states and 19957 transitions. [2020-12-22 02:32:11,189 INFO L78 Accepts]: Start accepts. Automaton has 17576 states and 19957 transitions. Word has length 378 [2020-12-22 02:32:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:11,190 INFO L481 AbstractCegarLoop]: Abstraction has 17576 states and 19957 transitions. [2020-12-22 02:32:11,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 17576 states and 19957 transitions. [2020-12-22 02:32:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-12-22 02:32:11,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:11,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:11,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:32:11,200 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:11,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:11,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2069008964, now seen corresponding path program 1 times [2020-12-22 02:32:11,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:11,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379041594] [2020-12-22 02:32:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:11,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379041594] [2020-12-22 02:32:11,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:11,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:32:11,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088388721] [2020-12-22 02:32:11,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:32:11,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:32:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:32:11,701 INFO L87 Difference]: Start difference. First operand 17576 states and 19957 transitions. Second operand 4 states. [2020-12-22 02:32:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:18,753 INFO L93 Difference]: Finished difference Result 43691 states and 49483 transitions. [2020-12-22 02:32:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:32:18,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 402 [2020-12-22 02:32:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:18,782 INFO L225 Difference]: With dead ends: 43691 [2020-12-22 02:32:18,782 INFO L226 Difference]: Without dead ends: 25692 [2020-12-22 02:32:18,795 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 02:32:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2020-12-22 02:32:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25691. [2020-12-22 02:32:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25691 states. [2020-12-22 02:32:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25691 states to 25691 states and 29092 transitions. [2020-12-22 02:32:19,159 INFO L78 Accepts]: Start accepts. Automaton has 25691 states and 29092 transitions. Word has length 402 [2020-12-22 02:32:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:19,160 INFO L481 AbstractCegarLoop]: Abstraction has 25691 states and 29092 transitions. [2020-12-22 02:32:19,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:32:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 25691 states and 29092 transitions. [2020-12-22 02:32:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2020-12-22 02:32:19,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:19,175 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:19,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:32:19,175 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash 61958258, now seen corresponding path program 1 times [2020-12-22 02:32:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105724907] [2020-12-22 02:32:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-12-22 02:32:19,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105724907] [2020-12-22 02:32:19,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:19,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:32:19,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810573235] [2020-12-22 02:32:19,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:19,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:19,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:19,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:19,432 INFO L87 Difference]: Start difference. First operand 25691 states and 29092 transitions. Second operand 3 states. [2020-12-22 02:32:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:24,484 INFO L93 Difference]: Finished difference Result 66283 states and 74993 transitions. [2020-12-22 02:32:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:24,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 424 [2020-12-22 02:32:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:24,524 INFO L225 Difference]: With dead ends: 66283 [2020-12-22 02:32:24,524 INFO L226 Difference]: Without dead ends: 40594 [2020-12-22 02:32:24,544 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 02:32:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40594 states. [2020-12-22 02:32:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40594 to 40578. [2020-12-22 02:32:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40578 states. [2020-12-22 02:32:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40578 states to 40578 states and 45324 transitions. [2020-12-22 02:32:25,003 INFO L78 Accepts]: Start accepts. Automaton has 40578 states and 45324 transitions. Word has length 424 [2020-12-22 02:32:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:25,004 INFO L481 AbstractCegarLoop]: Abstraction has 40578 states and 45324 transitions. [2020-12-22 02:32:25,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 40578 states and 45324 transitions. [2020-12-22 02:32:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-12-22 02:32:25,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:25,022 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 02:32:25,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 02:32:25,023 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1951505988, now seen corresponding path program 1 times [2020-12-22 02:32:25,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:25,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495276655] [2020-12-22 02:32:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-22 02:32:25,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495276655] [2020-12-22 02:32:25,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:25,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:32:25,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346106332] [2020-12-22 02:32:25,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:32:25,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:25,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:32:25,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:32:25,662 INFO L87 Difference]: Start difference. First operand 40578 states and 45324 transitions. Second operand 4 states. [2020-12-22 02:32:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:33,670 INFO L93 Difference]: Finished difference Result 97345 states and 108713 transitions. [2020-12-22 02:32:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:32:33,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-12-22 02:32:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:33,730 INFO L225 Difference]: With dead ends: 97345 [2020-12-22 02:32:33,731 INFO L226 Difference]: Without dead ends: 53781 [2020-12-22 02:32:33,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:32:33,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53781 states. [2020-12-22 02:32:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53781 to 46941. [2020-12-22 02:32:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46941 states. [2020-12-22 02:32:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46941 states to 46941 states and 51965 transitions. [2020-12-22 02:32:34,404 INFO L78 Accepts]: Start accepts. Automaton has 46941 states and 51965 transitions. Word has length 471 [2020-12-22 02:32:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:34,405 INFO L481 AbstractCegarLoop]: Abstraction has 46941 states and 51965 transitions. [2020-12-22 02:32:34,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:32:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 46941 states and 51965 transitions. [2020-12-22 02:32:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2020-12-22 02:32:34,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:34,439 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:34,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:32:34,439 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:34,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1067546786, now seen corresponding path program 1 times [2020-12-22 02:32:34,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:34,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324927892] [2020-12-22 02:32:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-12-22 02:32:35,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324927892] [2020-12-22 02:32:35,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:35,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:32:35,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7504492] [2020-12-22 02:32:35,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:32:35,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:32:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:32:35,244 INFO L87 Difference]: Start difference. First operand 46941 states and 51965 transitions. Second operand 3 states. [2020-12-22 02:32:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:40,127 INFO L93 Difference]: Finished difference Result 96818 states and 107200 transitions. [2020-12-22 02:32:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:32:40,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 525 [2020-12-22 02:32:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:40,176 INFO L225 Difference]: With dead ends: 96818 [2020-12-22 02:32:40,177 INFO L226 Difference]: Without dead ends: 48173 [2020-12-22 02:32:40,200 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 02:32:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48173 states. [2020-12-22 02:32:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48173 to 48170. [2020-12-22 02:32:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48170 states. [2020-12-22 02:32:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48170 states to 48170 states and 52503 transitions. [2020-12-22 02:32:40,915 INFO L78 Accepts]: Start accepts. Automaton has 48170 states and 52503 transitions. Word has length 525 [2020-12-22 02:32:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:40,916 INFO L481 AbstractCegarLoop]: Abstraction has 48170 states and 52503 transitions. [2020-12-22 02:32:40,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:32:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 48170 states and 52503 transitions. [2020-12-22 02:32:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2020-12-22 02:32:41,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:41,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:41,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:32:41,084 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:41,084 INFO L82 PathProgramCache]: Analyzing trace with hash 742987499, now seen corresponding path program 1 times [2020-12-22 02:32:41,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:41,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681985427] [2020-12-22 02:32:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 61 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:42,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681985427] [2020-12-22 02:32:42,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384153978] [2020-12-22 02:32:42,246 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 02:32:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:32:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:32:43,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:32:43,081 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:32:43,288 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:32:43,481 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:32:43,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 02:32:43,762 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:32:43,894 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:32:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 61 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:32:46,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:32:46,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-12-22 02:32:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584825334] [2020-12-22 02:32:46,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 02:32:46,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 02:32:46,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:32:46,337 INFO L87 Difference]: Start difference. First operand 48170 states and 52503 transitions. Second operand 5 states. [2020-12-22 02:32:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:32:53,592 INFO L93 Difference]: Finished difference Result 103572 states and 112634 transitions. [2020-12-22 02:32:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:32:53,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 548 [2020-12-22 02:32:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:32:53,769 INFO L225 Difference]: With dead ends: 103572 [2020-12-22 02:32:53,769 INFO L226 Difference]: Without dead ends: 55404 [2020-12-22 02:32:53,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 546 SyntacticMatches, 2 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 02:32:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55404 states. [2020-12-22 02:32:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55404 to 48595. [2020-12-22 02:32:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48595 states. [2020-12-22 02:32:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48595 states to 48595 states and 52930 transitions. [2020-12-22 02:32:54,839 INFO L78 Accepts]: Start accepts. Automaton has 48595 states and 52930 transitions. Word has length 548 [2020-12-22 02:32:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:32:54,840 INFO L481 AbstractCegarLoop]: Abstraction has 48595 states and 52930 transitions. [2020-12-22 02:32:54,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 02:32:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 48595 states and 52930 transitions. [2020-12-22 02:32:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2020-12-22 02:32:54,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:32:54,898 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:55,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 02:32:55,113 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:32:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:32:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash -934605928, now seen corresponding path program 1 times [2020-12-22 02:32:55,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:32:55,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763400207] [2020-12-22 02:32:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:32:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:32:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 369 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:32:56,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763400207] [2020-12-22 02:32:56,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:32:56,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:32:56,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353138706] [2020-12-22 02:32:56,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:32:56,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:32:56,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:32:56,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:32:56,438 INFO L87 Difference]: Start difference. First operand 48595 states and 52930 transitions. Second operand 4 states. [2020-12-22 02:33:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:04,918 INFO L93 Difference]: Finished difference Result 105703 states and 115492 transitions. [2020-12-22 02:33:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:33:04,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 653 [2020-12-22 02:33:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:05,009 INFO L225 Difference]: With dead ends: 105703 [2020-12-22 02:33:05,009 INFO L226 Difference]: Without dead ends: 56256 [2020-12-22 02:33:05,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:33:05,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56256 states. [2020-12-22 02:33:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56256 to 55822. [2020-12-22 02:33:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55822 states. [2020-12-22 02:33:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55822 states to 55822 states and 60920 transitions. [2020-12-22 02:33:05,925 INFO L78 Accepts]: Start accepts. Automaton has 55822 states and 60920 transitions. Word has length 653 [2020-12-22 02:33:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:05,926 INFO L481 AbstractCegarLoop]: Abstraction has 55822 states and 60920 transitions. [2020-12-22 02:33:05,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:33:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 55822 states and 60920 transitions. [2020-12-22 02:33:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2020-12-22 02:33:05,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:05,949 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:05,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:33:05,949 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:05,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1357065930, now seen corresponding path program 1 times [2020-12-22 02:33:05,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:05,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884090767] [2020-12-22 02:33:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 608 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-12-22 02:33:06,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884090767] [2020-12-22 02:33:06,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:06,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:33:06,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226326491] [2020-12-22 02:33:06,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:33:06,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:33:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:06,989 INFO L87 Difference]: Start difference. First operand 55822 states and 60920 transitions. Second operand 3 states. [2020-12-22 02:33:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:13,093 INFO L93 Difference]: Finished difference Result 120158 states and 131366 transitions. [2020-12-22 02:33:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:33:13,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 728 [2020-12-22 02:33:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:13,177 INFO L225 Difference]: With dead ends: 120158 [2020-12-22 02:33:13,177 INFO L226 Difference]: Without dead ends: 63063 [2020-12-22 02:33:13,216 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 02:33:13,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63063 states. [2020-12-22 02:33:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63063 to 60929. [2020-12-22 02:33:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60929 states. [2020-12-22 02:33:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60929 states to 60929 states and 66486 transitions. [2020-12-22 02:33:14,255 INFO L78 Accepts]: Start accepts. Automaton has 60929 states and 66486 transitions. Word has length 728 [2020-12-22 02:33:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:14,255 INFO L481 AbstractCegarLoop]: Abstraction has 60929 states and 66486 transitions. [2020-12-22 02:33:14,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:33:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 60929 states and 66486 transitions. [2020-12-22 02:33:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2020-12-22 02:33:14,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:14,294 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:14,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:33:14,294 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:14,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1454704647, now seen corresponding path program 1 times [2020-12-22 02:33:14,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:14,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003980132] [2020-12-22 02:33:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 524 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2020-12-22 02:33:15,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003980132] [2020-12-22 02:33:15,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:15,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:33:15,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395652569] [2020-12-22 02:33:15,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:33:15,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:33:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:33:15,489 INFO L87 Difference]: Start difference. First operand 60929 states and 66486 transitions. Second operand 4 states. [2020-12-22 02:33:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:25,749 INFO L93 Difference]: Finished difference Result 159336 states and 173847 transitions. [2020-12-22 02:33:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:33:25,751 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 747 [2020-12-22 02:33:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:25,901 INFO L225 Difference]: With dead ends: 159336 [2020-12-22 02:33:25,901 INFO L226 Difference]: Without dead ends: 97559 [2020-12-22 02:33:25,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:33:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97559 states. [2020-12-22 02:33:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97559 to 81796. [2020-12-22 02:33:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81796 states. [2020-12-22 02:33:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81796 states to 81796 states and 88911 transitions. [2020-12-22 02:33:27,540 INFO L78 Accepts]: Start accepts. Automaton has 81796 states and 88911 transitions. Word has length 747 [2020-12-22 02:33:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:27,541 INFO L481 AbstractCegarLoop]: Abstraction has 81796 states and 88911 transitions. [2020-12-22 02:33:27,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:33:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 81796 states and 88911 transitions. [2020-12-22 02:33:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2020-12-22 02:33:27,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:27,582 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:27,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 02:33:27,583 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:27,584 INFO L82 PathProgramCache]: Analyzing trace with hash -661881089, now seen corresponding path program 1 times [2020-12-22 02:33:27,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:27,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952930839] [2020-12-22 02:33:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 647 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-12-22 02:33:28,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952930839] [2020-12-22 02:33:28,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:28,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:33:28,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703252948] [2020-12-22 02:33:28,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:33:28,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:28,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:33:28,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:28,523 INFO L87 Difference]: Start difference. First operand 81796 states and 88911 transitions. Second operand 3 states. [2020-12-22 02:33:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:34,561 INFO L93 Difference]: Finished difference Result 170831 states and 185970 transitions. [2020-12-22 02:33:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:33:34,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 751 [2020-12-22 02:33:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:34,668 INFO L225 Difference]: With dead ends: 170831 [2020-12-22 02:33:34,668 INFO L226 Difference]: Without dead ends: 89462 [2020-12-22 02:33:34,712 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 02:33:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89462 states. [2020-12-22 02:33:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89462 to 89033. [2020-12-22 02:33:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89033 states. [2020-12-22 02:33:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89033 states to 89033 states and 96330 transitions. [2020-12-22 02:33:36,394 INFO L78 Accepts]: Start accepts. Automaton has 89033 states and 96330 transitions. Word has length 751 [2020-12-22 02:33:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:36,395 INFO L481 AbstractCegarLoop]: Abstraction has 89033 states and 96330 transitions. [2020-12-22 02:33:36,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:33:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 89033 states and 96330 transitions. [2020-12-22 02:33:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2020-12-22 02:33:36,457 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:36,462 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:36,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 02:33:36,463 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1379695375, now seen corresponding path program 1 times [2020-12-22 02:33:36,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:36,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262282899] [2020-12-22 02:33:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2020-12-22 02:33:37,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262282899] [2020-12-22 02:33:37,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:37,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:33:37,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251954160] [2020-12-22 02:33:37,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:33:37,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:33:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:33:37,622 INFO L87 Difference]: Start difference. First operand 89033 states and 96330 transitions. Second operand 4 states. [2020-12-22 02:33:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:48,707 INFO L93 Difference]: Finished difference Result 198935 states and 215158 transitions. [2020-12-22 02:33:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:33:48,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 752 [2020-12-22 02:33:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:48,847 INFO L225 Difference]: With dead ends: 198935 [2020-12-22 02:33:48,847 INFO L226 Difference]: Without dead ends: 109054 [2020-12-22 02:33:48,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:33:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109054 states. [2020-12-22 02:33:50,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109054 to 87758. [2020-12-22 02:33:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87758 states. [2020-12-22 02:33:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87758 states to 87758 states and 94985 transitions. [2020-12-22 02:33:50,484 INFO L78 Accepts]: Start accepts. Automaton has 87758 states and 94985 transitions. Word has length 752 [2020-12-22 02:33:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:50,485 INFO L481 AbstractCegarLoop]: Abstraction has 87758 states and 94985 transitions. [2020-12-22 02:33:50,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:33:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 87758 states and 94985 transitions. [2020-12-22 02:33:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-12-22 02:33:50,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:50,524 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:33:50,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 02:33:50,524 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:50,525 INFO L82 PathProgramCache]: Analyzing trace with hash -194407551, now seen corresponding path program 1 times [2020-12-22 02:33:50,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:50,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101774342] [2020-12-22 02:33:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:33:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:33:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-12-22 02:33:51,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101774342] [2020-12-22 02:33:51,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:33:51,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:33:51,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323164426] [2020-12-22 02:33:51,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:33:51,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:33:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:33:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:33:51,553 INFO L87 Difference]: Start difference. First operand 87758 states and 94985 transitions. Second operand 3 states. [2020-12-22 02:33:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:33:58,396 INFO L93 Difference]: Finished difference Result 177632 states and 192138 transitions. [2020-12-22 02:33:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:33:58,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 828 [2020-12-22 02:33:58,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:33:58,519 INFO L225 Difference]: With dead ends: 177632 [2020-12-22 02:33:58,519 INFO L226 Difference]: Without dead ends: 89451 [2020-12-22 02:33:58,572 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 02:33:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89451 states. [2020-12-22 02:33:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89451 to 82220. [2020-12-22 02:33:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82220 states. [2020-12-22 02:33:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82220 states to 82220 states and 88186 transitions. [2020-12-22 02:33:59,892 INFO L78 Accepts]: Start accepts. Automaton has 82220 states and 88186 transitions. Word has length 828 [2020-12-22 02:33:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:33:59,892 INFO L481 AbstractCegarLoop]: Abstraction has 82220 states and 88186 transitions. [2020-12-22 02:33:59,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:33:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 82220 states and 88186 transitions. [2020-12-22 02:33:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2020-12-22 02:33:59,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:33:59,926 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:59,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 02:33:59,926 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:33:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:33:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash 214038235, now seen corresponding path program 1 times [2020-12-22 02:33:59,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:33:59,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082143229] [2020-12-22 02:33:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 614 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-12-22 02:34:01,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082143229] [2020-12-22 02:34:01,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:34:01,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 02:34:01,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352760995] [2020-12-22 02:34:01,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 02:34:01,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 02:34:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:34:01,492 INFO L87 Difference]: Start difference. First operand 82220 states and 88186 transitions. Second operand 5 states. [2020-12-22 02:34:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:34:15,747 INFO L93 Difference]: Finished difference Result 185312 states and 198937 transitions. [2020-12-22 02:34:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 02:34:15,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 839 [2020-12-22 02:34:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:34:15,872 INFO L225 Difference]: With dead ends: 185312 [2020-12-22 02:34:15,873 INFO L226 Difference]: Without dead ends: 102244 [2020-12-22 02:34:15,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:34:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102244 states. [2020-12-22 02:34:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102244 to 78823. [2020-12-22 02:34:17,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78823 states. [2020-12-22 02:34:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78823 states to 78823 states and 84449 transitions. [2020-12-22 02:34:17,279 INFO L78 Accepts]: Start accepts. Automaton has 78823 states and 84449 transitions. Word has length 839 [2020-12-22 02:34:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:34:17,280 INFO L481 AbstractCegarLoop]: Abstraction has 78823 states and 84449 transitions. [2020-12-22 02:34:17,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 02:34:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 78823 states and 84449 transitions. [2020-12-22 02:34:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2020-12-22 02:34:17,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:34:17,317 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:34:17,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 02:34:17,317 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:34:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:34:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2147214553, now seen corresponding path program 1 times [2020-12-22 02:34:17,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:34:17,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336284288] [2020-12-22 02:34:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:34:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 617 proven. 254 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:34:19,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336284288] [2020-12-22 02:34:19,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632651149] [2020-12-22 02:34:19,140 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 02:34:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:34:19,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:34:19,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:34:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 623 proven. 61 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2020-12-22 02:34:22,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:34:22,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-12-22 02:34:22,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022962188] [2020-12-22 02:34:22,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:34:22,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:34:22,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:34:22,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:34:22,807 INFO L87 Difference]: Start difference. First operand 78823 states and 84449 transitions. Second operand 7 states.