/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/Problem18_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:36:58,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:36:58,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:36:58,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:36:58,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 02:36:58,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 02:36:58,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 02:36:58,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 02:36:58,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 02:36:58,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 02:36:58,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 02:36:58,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 02:36:58,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 02:36:58,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 02:36:58,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 02:36:58,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 02:36:58,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 02:36:58,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:36:58,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:36:58,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:36:58,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:36:58,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:36:58,743 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:36:58,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:36:58,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:36:58,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:36:58,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:36:58,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:36:58,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:36:58,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:36:58,745 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:36:58,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:36:58,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:36:58,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:36:58,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:36:58,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:36:58,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:36:58,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:36:58,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:36:58,748 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:36:58,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:36:58,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:36:58,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:36:58,752 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:36:59,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:36:59,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:36:59,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:36:59,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:36:59,247 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:36:59,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label01.c [2020-12-22 02:36:59,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/186959474/ffbfa70c31754fa289cfe3bfdc792e46/FLAGfc37d7428 [2020-12-22 02:37:00,312 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:37:00,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label01.c [2020-12-22 02:37:00,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/186959474/ffbfa70c31754fa289cfe3bfdc792e46/FLAGfc37d7428 [2020-12-22 02:37:00,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/186959474/ffbfa70c31754fa289cfe3bfdc792e46 [2020-12-22 02:37:00,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:37:00,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:37:00,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:37:00,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:37:00,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:37:00,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:37:00" (1/1) ... [2020-12-22 02:37:00,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e38f35f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:00, skipping insertion in model container [2020-12-22 02:37:00,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:37:00" (1/1) ... [2020-12-22 02:37:00,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:37:00,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:37:00,818 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/Problem18_label01.c[2998,3011] [2020-12-22 02:37:01,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:37:01,795 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:37:01,846 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/Problem18_label01.c[2998,3011] [2020-12-22 02:37:02,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:37:02,659 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:37:02,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02 WrapperNode [2020-12-22 02:37:02,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:37:02,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:37:02,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:37:02,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:37:02,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:02,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:03,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:37:03,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:37:03,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:37:03,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:37:03,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:03,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:03,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:03,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:03,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:03,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:03,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (1/1) ... [2020-12-22 02:37:03,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:37:03,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:37:03,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:37:03,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:37:03,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (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 02:37:03,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:37:03,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:37:03,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:37:03,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:37:08,043 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:37:08,043 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 02:37:08,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:37:08 BoogieIcfgContainer [2020-12-22 02:37:08,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:37:08,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:37:08,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:37:08,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:37:08,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:37:00" (1/3) ... [2020-12-22 02:37:08,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5848e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:37:08, skipping insertion in model container [2020-12-22 02:37:08,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:02" (2/3) ... [2020-12-22 02:37:08,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5848e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:37:08, skipping insertion in model container [2020-12-22 02:37:08,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:37:08" (3/3) ... [2020-12-22 02:37:08,064 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label01.c [2020-12-22 02:37:08,072 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:37:08,080 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:37:08,108 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:37:08,177 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:37:08,177 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:37:08,177 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:37:08,178 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:37:08,178 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:37:08,178 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:37:08,178 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:37:08,178 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:37:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2020-12-22 02:37:08,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 02:37:08,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:37:08,236 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] [2020-12-22 02:37:08,237 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:37:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:37:08,246 INFO L82 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2020-12-22 02:37:08,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:37:08,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451609358] [2020-12-22 02:37:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:37:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:37:08,592 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 02:37:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451609358] [2020-12-22 02:37:08,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:37:08,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:37:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065945963] [2020-12-22 02:37:08,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:37:08,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:37:08,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:37:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:37:08,633 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2020-12-22 02:37:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:37:18,595 INFO L93 Difference]: Finished difference Result 2900 states and 5648 transitions. [2020-12-22 02:37:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:37:18,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-22 02:37:18,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:37:18,654 INFO L225 Difference]: With dead ends: 2900 [2020-12-22 02:37:18,654 INFO L226 Difference]: Without dead ends: 2074 [2020-12-22 02:37:18,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:37:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-12-22 02:37:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2020-12-22 02:37:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2020-12-22 02:37:18,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3220 transitions. [2020-12-22 02:37:18,897 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3220 transitions. Word has length 26 [2020-12-22 02:37:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:37:18,898 INFO L481 AbstractCegarLoop]: Abstraction has 2074 states and 3220 transitions. [2020-12-22 02:37:18,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:37:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3220 transitions. [2020-12-22 02:37:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 02:37:18,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:37:18,906 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:37:18,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:37:18,908 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:37:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:37:18,912 INFO L82 PathProgramCache]: Analyzing trace with hash -625251612, now seen corresponding path program 1 times [2020-12-22 02:37:18,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:37:18,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649926817] [2020-12-22 02:37:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:37:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:37:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:37:19,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649926817] [2020-12-22 02:37:19,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:37:19,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:37:19,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321184131] [2020-12-22 02:37:19,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:37:19,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:37:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:37:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:37:19,288 INFO L87 Difference]: Start difference. First operand 2074 states and 3220 transitions. Second operand 3 states. [2020-12-22 02:37:24,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:37:24,622 INFO L93 Difference]: Finished difference Result 5526 states and 8953 transitions. [2020-12-22 02:37:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:37:24,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2020-12-22 02:37:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:37:24,645 INFO L225 Difference]: With dead ends: 5526 [2020-12-22 02:37:24,645 INFO L226 Difference]: Without dead ends: 3454 [2020-12-22 02:37:24,651 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 02:37:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2020-12-22 02:37:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3454. [2020-12-22 02:37:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3454 states. [2020-12-22 02:37:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5074 transitions. [2020-12-22 02:37:24,743 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5074 transitions. Word has length 119 [2020-12-22 02:37:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:37:24,744 INFO L481 AbstractCegarLoop]: Abstraction has 3454 states and 5074 transitions. [2020-12-22 02:37:24,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:37:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5074 transitions. [2020-12-22 02:37:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 02:37:24,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:37:24,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:37:24,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:37:24,749 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:37:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:37:24,749 INFO L82 PathProgramCache]: Analyzing trace with hash 567080769, now seen corresponding path program 1 times [2020-12-22 02:37:24,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:37:24,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923858359] [2020-12-22 02:37:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:37:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:37:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:37:25,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923858359] [2020-12-22 02:37:25,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:37:25,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:37:25,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448098677] [2020-12-22 02:37:25,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:37:25,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:37:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:37:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:37:25,117 INFO L87 Difference]: Start difference. First operand 3454 states and 5074 transitions. Second operand 4 states. [2020-12-22 02:37:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:37:33,769 INFO L93 Difference]: Finished difference Result 9668 states and 14564 transitions. [2020-12-22 02:37:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:37:33,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-12-22 02:37:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:37:33,806 INFO L225 Difference]: With dead ends: 9668 [2020-12-22 02:37:33,806 INFO L226 Difference]: Without dead ends: 6216 [2020-12-22 02:37:33,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:37:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6216 states. [2020-12-22 02:37:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6216 to 5524. [2020-12-22 02:37:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5524 states. [2020-12-22 02:37:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 7397 transitions. [2020-12-22 02:37:33,959 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 7397 transitions. Word has length 144 [2020-12-22 02:37:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:37:33,960 INFO L481 AbstractCegarLoop]: Abstraction has 5524 states and 7397 transitions. [2020-12-22 02:37:33,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:37:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 7397 transitions. [2020-12-22 02:37:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-12-22 02:37:33,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:37:33,967 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:37:33,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:37:33,967 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:37:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:37:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1314371838, now seen corresponding path program 1 times [2020-12-22 02:37:33,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:37:33,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637276466] [2020-12-22 02:37:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:37:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:37:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:37:34,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637276466] [2020-12-22 02:37:34,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:37:34,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:37:34,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580495473] [2020-12-22 02:37:34,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:37:34,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:37:34,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:37:34,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:37:34,724 INFO L87 Difference]: Start difference. First operand 5524 states and 7397 transitions. Second operand 4 states. [2020-12-22 02:37:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:37:41,324 INFO L93 Difference]: Finished difference Result 13861 states and 18483 transitions. [2020-12-22 02:37:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:37:41,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-12-22 02:37:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:37:41,367 INFO L225 Difference]: With dead ends: 13861 [2020-12-22 02:37:41,367 INFO L226 Difference]: Without dead ends: 8286 [2020-12-22 02:37:41,377 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 02:37:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2020-12-22 02:37:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 8284. [2020-12-22 02:37:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8284 states. [2020-12-22 02:37:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 9691 transitions. [2020-12-22 02:37:41,559 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 9691 transitions. Word has length 299 [2020-12-22 02:37:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:37:41,559 INFO L481 AbstractCegarLoop]: Abstraction has 8284 states and 9691 transitions. [2020-12-22 02:37:41,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:37:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 9691 transitions. [2020-12-22 02:37:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 910 [2020-12-22 02:37:41,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:37:41,592 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:37:41,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:37:41,593 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:37:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:37:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash 900626984, now seen corresponding path program 1 times [2020-12-22 02:37:41,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:37:41,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396340904] [2020-12-22 02:37:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:37:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:37:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2020-12-22 02:37:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396340904] [2020-12-22 02:37:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649898927] [2020-12-22 02:37:44,180 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 02:37:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:37:44,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:37:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:37:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-22 02:37:46,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:37:46,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 02:37:46,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132827342] [2020-12-22 02:37:46,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:37:46,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:37:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:37:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:37:46,508 INFO L87 Difference]: Start difference. First operand 8284 states and 9691 transitions. Second operand 3 states. [2020-12-22 02:37:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:37:50,884 INFO L93 Difference]: Finished difference Result 20016 states and 24103 transitions. [2020-12-22 02:37:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:37:50,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 909 [2020-12-22 02:37:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:37:50,932 INFO L225 Difference]: With dead ends: 20016 [2020-12-22 02:37:50,933 INFO L226 Difference]: Without dead ends: 11734 [2020-12-22 02:37:50,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:37:50,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11734 states. [2020-12-22 02:37:51,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11734 to 11044. [2020-12-22 02:37:51,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11044 states. [2020-12-22 02:37:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 12638 transitions. [2020-12-22 02:37:51,144 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 12638 transitions. Word has length 909 [2020-12-22 02:37:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:37:51,146 INFO L481 AbstractCegarLoop]: Abstraction has 11044 states and 12638 transitions. [2020-12-22 02:37:51,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:37:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 12638 transitions. [2020-12-22 02:37:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2020-12-22 02:37:51,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:37:51,261 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:37:51,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:37:51,477 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:37:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:37:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1497919545, now seen corresponding path program 1 times [2020-12-22 02:37:51,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:37:51,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958629788] [2020-12-22 02:37:51,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:37:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:37:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2020-12-22 02:37:52,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958629788] [2020-12-22 02:37:52,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:37:52,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:37:52,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944012551] [2020-12-22 02:37:52,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:37:52,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:37:52,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:37:52,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:37:52,854 INFO L87 Difference]: Start difference. First operand 11044 states and 12638 transitions. Second operand 3 states. [2020-12-22 02:37:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:37:57,564 INFO L93 Difference]: Finished difference Result 26916 states and 31188 transitions. [2020-12-22 02:37:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:37:57,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 958 [2020-12-22 02:37:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:37:57,600 INFO L225 Difference]: With dead ends: 26916 [2020-12-22 02:37:57,601 INFO L226 Difference]: Without dead ends: 15874 [2020-12-22 02:37:57,616 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 02:37:57,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2020-12-22 02:37:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 15874. [2020-12-22 02:37:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15874 states. [2020-12-22 02:37:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15874 states to 15874 states and 17922 transitions. [2020-12-22 02:37:57,862 INFO L78 Accepts]: Start accepts. Automaton has 15874 states and 17922 transitions. Word has length 958 [2020-12-22 02:37:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:37:57,864 INFO L481 AbstractCegarLoop]: Abstraction has 15874 states and 17922 transitions. [2020-12-22 02:37:57,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:37:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 15874 states and 17922 transitions. [2020-12-22 02:37:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 966 [2020-12-22 02:37:57,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:37:57,884 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:37:57,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:37:57,884 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:37:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:37:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash -67821150, now seen corresponding path program 1 times [2020-12-22 02:37:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:37:57,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528942701] [2020-12-22 02:37:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:37:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 321 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:38:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528942701] [2020-12-22 02:38:01,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872478523] [2020-12-22 02:38:01,063 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 02:38:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:38:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:38:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-12-22 02:38:02,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:38:02,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-12-22 02:38:02,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613168590] [2020-12-22 02:38:02,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:38:02,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:38:02,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:38:02,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:38:02,918 INFO L87 Difference]: Start difference. First operand 15874 states and 17922 transitions. Second operand 3 states. [2020-12-22 02:38:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:38:06,963 INFO L93 Difference]: Finished difference Result 31746 states and 35842 transitions. [2020-12-22 02:38:06,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:38:06,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 965 [2020-12-22 02:38:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:38:07,000 INFO L225 Difference]: With dead ends: 31746 [2020-12-22 02:38:07,000 INFO L226 Difference]: Without dead ends: 15874 [2020-12-22 02:38:07,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:38:07,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15874 states. [2020-12-22 02:38:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15874 to 15874. [2020-12-22 02:38:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15874 states. [2020-12-22 02:38:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15874 states to 15874 states and 17631 transitions. [2020-12-22 02:38:07,357 INFO L78 Accepts]: Start accepts. Automaton has 15874 states and 17631 transitions. Word has length 965 [2020-12-22 02:38:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:38:07,359 INFO L481 AbstractCegarLoop]: Abstraction has 15874 states and 17631 transitions. [2020-12-22 02:38:07,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:38:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 15874 states and 17631 transitions. [2020-12-22 02:38:07,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1000 [2020-12-22 02:38:07,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:38:07,372 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:38:07,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:38:07,588 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:38:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:38:07,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1313915219, now seen corresponding path program 1 times [2020-12-22 02:38:07,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:38:07,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519488473] [2020-12-22 02:38:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:38:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2020-12-22 02:38:09,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519488473] [2020-12-22 02:38:09,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:38:09,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:38:09,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65023485] [2020-12-22 02:38:09,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:38:09,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:38:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:38:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:38:09,180 INFO L87 Difference]: Start difference. First operand 15874 states and 17631 transitions. Second operand 3 states. [2020-12-22 02:38:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:38:13,854 INFO L93 Difference]: Finished difference Result 36576 states and 40770 transitions. [2020-12-22 02:38:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:38:13,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 999 [2020-12-22 02:38:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:38:13,896 INFO L225 Difference]: With dead ends: 36576 [2020-12-22 02:38:13,896 INFO L226 Difference]: Without dead ends: 20704 [2020-12-22 02:38:13,915 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 02:38:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2020-12-22 02:38:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20704. [2020-12-22 02:38:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20704 states. [2020-12-22 02:38:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20704 states to 20704 states and 22908 transitions. [2020-12-22 02:38:14,218 INFO L78 Accepts]: Start accepts. Automaton has 20704 states and 22908 transitions. Word has length 999 [2020-12-22 02:38:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:38:14,220 INFO L481 AbstractCegarLoop]: Abstraction has 20704 states and 22908 transitions. [2020-12-22 02:38:14,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:38:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 20704 states and 22908 transitions. [2020-12-22 02:38:14,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1086 [2020-12-22 02:38:14,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:38:14,242 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:38:14,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:38:14,243 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:38:14,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:38:14,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1806155242, now seen corresponding path program 1 times [2020-12-22 02:38:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:38:14,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064735398] [2020-12-22 02:38:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:38:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-22 02:38:15,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064735398] [2020-12-22 02:38:15,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:38:15,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:38:15,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81325804] [2020-12-22 02:38:15,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:38:15,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:38:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:38:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:38:15,482 INFO L87 Difference]: Start difference. First operand 20704 states and 22908 transitions. Second operand 3 states. [2020-12-22 02:38:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:38:20,057 INFO L93 Difference]: Finished difference Result 46926 states and 52012 transitions. [2020-12-22 02:38:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:38:20,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1085 [2020-12-22 02:38:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:38:20,095 INFO L225 Difference]: With dead ends: 46926 [2020-12-22 02:38:20,096 INFO L226 Difference]: Without dead ends: 24844 [2020-12-22 02:38:20,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 02:38:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2020-12-22 02:38:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 22774. [2020-12-22 02:38:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22774 states. [2020-12-22 02:38:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22774 states to 22774 states and 25038 transitions. [2020-12-22 02:38:20,601 INFO L78 Accepts]: Start accepts. Automaton has 22774 states and 25038 transitions. Word has length 1085 [2020-12-22 02:38:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:38:20,603 INFO L481 AbstractCegarLoop]: Abstraction has 22774 states and 25038 transitions. [2020-12-22 02:38:20,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:38:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 22774 states and 25038 transitions. [2020-12-22 02:38:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1123 [2020-12-22 02:38:20,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:38:20,629 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:38:20,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:38:20,630 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:38:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:38:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash 846114684, now seen corresponding path program 1 times [2020-12-22 02:38:20,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:38:20,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444290678] [2020-12-22 02:38:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:38:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 738 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2020-12-22 02:38:22,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444290678] [2020-12-22 02:38:22,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:38:22,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:38:22,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126425586] [2020-12-22 02:38:22,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:38:22,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:38:22,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:38:22,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:38:22,504 INFO L87 Difference]: Start difference. First operand 22774 states and 25038 transitions. Second operand 4 states. [2020-12-22 02:38:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:38:29,890 INFO L93 Difference]: Finished difference Result 48996 states and 54389 transitions. [2020-12-22 02:38:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:38:29,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1122 [2020-12-22 02:38:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:38:29,926 INFO L225 Difference]: With dead ends: 48996 [2020-12-22 02:38:29,927 INFO L226 Difference]: Without dead ends: 26224 [2020-12-22 02:38:29,946 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 02:38:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26224 states. [2020-12-22 02:38:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26224 to 26224. [2020-12-22 02:38:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26224 states. [2020-12-22 02:38:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26224 states to 26224 states and 28827 transitions. [2020-12-22 02:38:30,295 INFO L78 Accepts]: Start accepts. Automaton has 26224 states and 28827 transitions. Word has length 1122 [2020-12-22 02:38:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:38:30,296 INFO L481 AbstractCegarLoop]: Abstraction has 26224 states and 28827 transitions. [2020-12-22 02:38:30,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:38:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 26224 states and 28827 transitions. [2020-12-22 02:38:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1152 [2020-12-22 02:38:30,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:38:30,316 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:38:30,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 02:38:30,317 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:38:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:38:30,317 INFO L82 PathProgramCache]: Analyzing trace with hash -324474639, now seen corresponding path program 1 times [2020-12-22 02:38:30,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:38:30,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898346575] [2020-12-22 02:38:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:38:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 586 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-22 02:38:31,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898346575] [2020-12-22 02:38:31,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:38:31,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:38:31,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917014360] [2020-12-22 02:38:31,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:38:31,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:38:31,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:38:31,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:38:31,870 INFO L87 Difference]: Start difference. First operand 26224 states and 28827 transitions. Second operand 3 states. [2020-12-22 02:38:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:38:37,263 INFO L93 Difference]: Finished difference Result 58658 states and 64795 transitions. [2020-12-22 02:38:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:38:37,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1151 [2020-12-22 02:38:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:38:37,310 INFO L225 Difference]: With dead ends: 58658 [2020-12-22 02:38:37,311 INFO L226 Difference]: Without dead ends: 33816 [2020-12-22 02:38:37,326 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 02:38:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33816 states. [2020-12-22 02:38:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33816 to 31744. [2020-12-22 02:38:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31744 states. [2020-12-22 02:38:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31744 states to 31744 states and 34932 transitions. [2020-12-22 02:38:37,696 INFO L78 Accepts]: Start accepts. Automaton has 31744 states and 34932 transitions. Word has length 1151 [2020-12-22 02:38:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:38:37,699 INFO L481 AbstractCegarLoop]: Abstraction has 31744 states and 34932 transitions. [2020-12-22 02:38:37,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:38:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 31744 states and 34932 transitions. [2020-12-22 02:38:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1169 [2020-12-22 02:38:37,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:38:37,720 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:38:37,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:38:37,720 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:38:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:38:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -638691371, now seen corresponding path program 1 times [2020-12-22 02:38:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:38:37,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429976369] [2020-12-22 02:38:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:38:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 483 proven. 758 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-12-22 02:38:41,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429976369] [2020-12-22 02:38:41,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872269458] [2020-12-22 02:38:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:38:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:41,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:38:41,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:38:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2020-12-22 02:38:43,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:38:43,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2020-12-22 02:38:43,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982958791] [2020-12-22 02:38:43,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:38:43,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:38:43,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:38:43,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:38:43,783 INFO L87 Difference]: Start difference. First operand 31744 states and 34932 transitions. Second operand 3 states. [2020-12-22 02:38:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:38:49,213 INFO L93 Difference]: Finished difference Result 72456 states and 80647 transitions. [2020-12-22 02:38:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:38:49,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1168 [2020-12-22 02:38:49,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:38:49,278 INFO L225 Difference]: With dead ends: 72456 [2020-12-22 02:38:49,278 INFO L226 Difference]: Without dead ends: 42094 [2020-12-22 02:38:49,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1175 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 02:38:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42094 states. [2020-12-22 02:38:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42094 to 42094. [2020-12-22 02:38:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42094 states. [2020-12-22 02:38:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42094 states to 42094 states and 46048 transitions. [2020-12-22 02:38:49,775 INFO L78 Accepts]: Start accepts. Automaton has 42094 states and 46048 transitions. Word has length 1168 [2020-12-22 02:38:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:38:49,777 INFO L481 AbstractCegarLoop]: Abstraction has 42094 states and 46048 transitions. [2020-12-22 02:38:49,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:38:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 42094 states and 46048 transitions. [2020-12-22 02:38:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1219 [2020-12-22 02:38:49,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:38:49,807 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:38:50,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 02:38:50,021 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:38:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:38:50,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1365851762, now seen corresponding path program 1 times [2020-12-22 02:38:50,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:38:50,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355362351] [2020-12-22 02:38:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:38:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 831 proven. 581 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-22 02:38:53,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355362351] [2020-12-22 02:38:53,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992132160] [2020-12-22 02:38:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:38:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:38:53,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:38:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:38:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 964 proven. 0 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2020-12-22 02:38:55,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:38:55,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 02:38:55,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565687827] [2020-12-22 02:38:55,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:38:55,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:38:55,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:38:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:38:55,316 INFO L87 Difference]: Start difference. First operand 42094 states and 46048 transitions. Second operand 3 states. [2020-12-22 02:39:00,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:39:00,358 INFO L93 Difference]: Finished difference Result 91776 states and 100635 transitions. [2020-12-22 02:39:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:39:00,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1218 [2020-12-22 02:39:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:39:00,416 INFO L225 Difference]: With dead ends: 91776 [2020-12-22 02:39:00,417 INFO L226 Difference]: Without dead ends: 50374 [2020-12-22 02:39:00,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1223 GetRequests, 1218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:39:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50374 states. [2020-12-22 02:39:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50374 to 47614. [2020-12-22 02:39:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47614 states. [2020-12-22 02:39:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47614 states to 47614 states and 49976 transitions. [2020-12-22 02:39:00,868 INFO L78 Accepts]: Start accepts. Automaton has 47614 states and 49976 transitions. Word has length 1218 [2020-12-22 02:39:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:39:00,870 INFO L481 AbstractCegarLoop]: Abstraction has 47614 states and 49976 transitions. [2020-12-22 02:39:00,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:39:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 47614 states and 49976 transitions. [2020-12-22 02:39:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1220 [2020-12-22 02:39:00,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:39:00,892 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:39:01,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:39:01,106 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:39:01,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:39:01,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1159925958, now seen corresponding path program 1 times [2020-12-22 02:39:01,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:39:01,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804534822] [2020-12-22 02:39:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:39:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:39:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 678 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2020-12-22 02:39:02,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804534822] [2020-12-22 02:39:02,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:39:02,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:39:02,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445822747] [2020-12-22 02:39:02,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:39:02,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:39:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:39:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:39:02,750 INFO L87 Difference]: Start difference. First operand 47614 states and 49976 transitions. Second operand 3 states. [2020-12-22 02:39:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:39:06,940 INFO L93 Difference]: Finished difference Result 94536 states and 99259 transitions. [2020-12-22 02:39:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:39:06,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1219 [2020-12-22 02:39:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:39:07,013 INFO L225 Difference]: With dead ends: 94536 [2020-12-22 02:39:07,013 INFO L226 Difference]: Without dead ends: 47614 [2020-12-22 02:39:07,046 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 02:39:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47614 states. [2020-12-22 02:39:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47614 to 47614. [2020-12-22 02:39:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47614 states. [2020-12-22 02:39:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47614 states to 47614 states and 49712 transitions. [2020-12-22 02:39:07,740 INFO L78 Accepts]: Start accepts. Automaton has 47614 states and 49712 transitions. Word has length 1219 [2020-12-22 02:39:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:39:07,741 INFO L481 AbstractCegarLoop]: Abstraction has 47614 states and 49712 transitions. [2020-12-22 02:39:07,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:39:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 47614 states and 49712 transitions. [2020-12-22 02:39:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1241 [2020-12-22 02:39:07,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:39:07,763 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:39:07,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:39:07,763 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:39:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:39:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash 118988770, now seen corresponding path program 1 times [2020-12-22 02:39:07,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:39:07,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155374225] [2020-12-22 02:39:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:39:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:39:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 923 proven. 768 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 02:39:12,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155374225] [2020-12-22 02:39:12,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056226555] [2020-12-22 02:39:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:39:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:39:12,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:39:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:39:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 1096 proven. 0 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2020-12-22 02:39:14,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:39:14,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2020-12-22 02:39:14,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962337836] [2020-12-22 02:39:14,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:39:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:39:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:39:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-22 02:39:14,574 INFO L87 Difference]: Start difference. First operand 47614 states and 49712 transitions. Second operand 3 states. [2020-12-22 02:39:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:39:19,928 INFO L93 Difference]: Finished difference Result 102126 states and 107060 transitions. [2020-12-22 02:39:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:39:19,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1240 [2020-12-22 02:39:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:39:20,004 INFO L225 Difference]: With dead ends: 102126 [2020-12-22 02:39:20,005 INFO L226 Difference]: Without dead ends: 54514 [2020-12-22 02:39:20,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1249 GetRequests, 1240 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-22 02:39:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54514 states. [2020-12-22 02:39:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54514 to 52444. [2020-12-22 02:39:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52444 states. [2020-12-22 02:39:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52444 states to 52444 states and 54685 transitions. [2020-12-22 02:39:20,573 INFO L78 Accepts]: Start accepts. Automaton has 52444 states and 54685 transitions. Word has length 1240 [2020-12-22 02:39:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:39:20,574 INFO L481 AbstractCegarLoop]: Abstraction has 52444 states and 54685 transitions. [2020-12-22 02:39:20,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:39:20,574 INFO L276 IsEmpty]: Start isEmpty. Operand 52444 states and 54685 transitions. [2020-12-22 02:39:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1399 [2020-12-22 02:39:20,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:39:20,602 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:39:20,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 02:39:20,813 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:39:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:39:20,815 INFO L82 PathProgramCache]: Analyzing trace with hash 245871223, now seen corresponding path program 1 times [2020-12-22 02:39:20,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:39:20,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731465300] [2020-12-22 02:39:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:39:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:39:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2159 backedges. 1442 proven. 0 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2020-12-22 02:39:22,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731465300] [2020-12-22 02:39:22,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:39:22,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:39:22,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389018935] [2020-12-22 02:39:22,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:39:22,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:39:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:39:22,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:39:22,975 INFO L87 Difference]: Start difference. First operand 52444 states and 54685 transitions. Second operand 3 states. [2020-12-22 02:39:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:39:28,208 INFO L93 Difference]: Finished difference Result 131106 states and 136886 transitions. [2020-12-22 02:39:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:39:28,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1398 [2020-12-22 02:39:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:39:28,289 INFO L225 Difference]: With dead ends: 131106 [2020-12-22 02:39:28,289 INFO L226 Difference]: Without dead ends: 79354 [2020-12-22 02:39:28,319 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 02:39:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79354 states. [2020-12-22 02:39:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79354 to 77974. [2020-12-22 02:39:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77974 states. [2020-12-22 02:39:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77974 states to 77974 states and 80939 transitions. [2020-12-22 02:39:29,034 INFO L78 Accepts]: Start accepts. Automaton has 77974 states and 80939 transitions. Word has length 1398 [2020-12-22 02:39:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:39:29,034 INFO L481 AbstractCegarLoop]: Abstraction has 77974 states and 80939 transitions. [2020-12-22 02:39:29,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:39:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 77974 states and 80939 transitions. [2020-12-22 02:39:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1401 [2020-12-22 02:39:29,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:39:29,058 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:39:29,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:39:29,058 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:39:29,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:39:29,059 INFO L82 PathProgramCache]: Analyzing trace with hash -219381029, now seen corresponding path program 1 times [2020-12-22 02:39:29,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:39:29,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50290083] [2020-12-22 02:39:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:39:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:39:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 1321 proven. 0 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-22 02:39:31,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50290083] [2020-12-22 02:39:31,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:39:31,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:39:31,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967343042] [2020-12-22 02:39:31,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:39:31,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:39:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:39:31,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:39:31,746 INFO L87 Difference]: Start difference. First operand 77974 states and 80939 transitions. Second operand 4 states. [2020-12-22 02:39:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:39:37,403 INFO L93 Difference]: Finished difference Result 155443 states and 161372 transitions. [2020-12-22 02:39:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 02:39:37,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1400 [2020-12-22 02:39:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:39:37,486 INFO L225 Difference]: With dead ends: 155443 [2020-12-22 02:39:37,487 INFO L226 Difference]: Without dead ends: 78161 [2020-12-22 02:39:37,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:39:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78161 states. [2020-12-22 02:39:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78161 to 77974. [2020-12-22 02:39:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77974 states. [2020-12-22 02:39:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77974 states to 77974 states and 80931 transitions. [2020-12-22 02:39:38,200 INFO L78 Accepts]: Start accepts. Automaton has 77974 states and 80931 transitions. Word has length 1400 [2020-12-22 02:39:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:39:38,201 INFO L481 AbstractCegarLoop]: Abstraction has 77974 states and 80931 transitions. [2020-12-22 02:39:38,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:39:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 77974 states and 80931 transitions. [2020-12-22 02:39:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1418 [2020-12-22 02:39:38,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:39:38,219 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 02:39:38,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:39:38,219 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:39:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:39:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash -867342427, now seen corresponding path program 1 times [2020-12-22 02:39:38,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:39:38,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812115272] [2020-12-22 02:39:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:39:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:39:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2613 backedges. 1167 proven. 1315 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-12-22 02:39:44,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812115272] [2020-12-22 02:39:44,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220420278] [2020-12-22 02:39:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:39:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:39:44,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:39:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:39:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2613 backedges. 1568 proven. 0 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2020-12-22 02:39:47,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:39:47,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2020-12-22 02:39:47,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802049084] [2020-12-22 02:39:47,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:39:47,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:39:47,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:39:47,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 02:39:47,098 INFO L87 Difference]: Start difference. First operand 77974 states and 80931 transitions. Second operand 3 states. [2020-12-22 02:39:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:39:52,384 INFO L93 Difference]: Finished difference Result 157326 states and 163262 transitions. [2020-12-22 02:39:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:39:52,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1417 [2020-12-22 02:39:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:39:52,471 INFO L225 Difference]: With dead ends: 157326 [2020-12-22 02:39:52,471 INFO L226 Difference]: Without dead ends: 79354 [2020-12-22 02:39:52,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1426 GetRequests, 1417 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 02:39:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79354 states. [2020-12-22 02:39:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79354 to 75904. [2020-12-22 02:39:53,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75904 states. [2020-12-22 02:39:53,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75904 states to 75904 states and 78405 transitions. [2020-12-22 02:39:53,271 INFO L78 Accepts]: Start accepts. Automaton has 75904 states and 78405 transitions. Word has length 1417 [2020-12-22 02:39:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:39:53,271 INFO L481 AbstractCegarLoop]: Abstraction has 75904 states and 78405 transitions. [2020-12-22 02:39:53,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:39:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 75904 states and 78405 transitions. [2020-12-22 02:39:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1532 [2020-12-22 02:39:53,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:39:53,296 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:39:53,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 02:39:53,497 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:39:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:39:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash 17647821, now seen corresponding path program 1 times [2020-12-22 02:39:53,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:39:53,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948594319] [2020-12-22 02:39:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:39:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:39:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 1948 proven. 0 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2020-12-22 02:39:55,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948594319] [2020-12-22 02:39:55,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:39:55,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:39:55,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115481902] [2020-12-22 02:39:55,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:39:55,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:39:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:39:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:39:55,820 INFO L87 Difference]: Start difference. First operand 75904 states and 78405 transitions. Second operand 3 states. [2020-12-22 02:40:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:40:00,964 INFO L93 Difference]: Finished difference Result 162848 states and 168241 transitions. [2020-12-22 02:40:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:40:00,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1531 [2020-12-22 02:40:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:40:01,074 INFO L225 Difference]: With dead ends: 162848 [2020-12-22 02:40:01,074 INFO L226 Difference]: Without dead ends: 87636 [2020-12-22 02:40:01,123 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 02:40:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87636 states. [2020-12-22 02:40:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87636 to 82114. [2020-12-22 02:40:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82114 states. [2020-12-22 02:40:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82114 states to 82114 states and 84765 transitions. [2020-12-22 02:40:02,360 INFO L78 Accepts]: Start accepts. Automaton has 82114 states and 84765 transitions. Word has length 1531 [2020-12-22 02:40:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:40:02,361 INFO L481 AbstractCegarLoop]: Abstraction has 82114 states and 84765 transitions. [2020-12-22 02:40:02,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:40:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 82114 states and 84765 transitions. [2020-12-22 02:40:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1559 [2020-12-22 02:40:02,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:40:02,397 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:40:02,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 02:40:02,398 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:40:02,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:40:02,399 INFO L82 PathProgramCache]: Analyzing trace with hash 816008112, now seen corresponding path program 1 times [2020-12-22 02:40:02,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:40:02,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867410600] [2020-12-22 02:40:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:40:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:40:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3047 backedges. 946 proven. 0 refuted. 0 times theorem prover too weak. 2101 trivial. 0 not checked. [2020-12-22 02:40:05,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867410600] [2020-12-22 02:40:05,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:40:05,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:40:05,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134190269] [2020-12-22 02:40:05,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:40:05,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:40:05,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:40:05,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:40:05,367 INFO L87 Difference]: Start difference. First operand 82114 states and 84765 transitions. Second operand 3 states. [2020-12-22 02:40:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:40:11,179 INFO L93 Difference]: Finished difference Result 170436 states and 176097 transitions. [2020-12-22 02:40:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:40:11,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1558 [2020-12-22 02:40:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:40:11,277 INFO L225 Difference]: With dead ends: 170436 [2020-12-22 02:40:11,277 INFO L226 Difference]: Without dead ends: 89014 [2020-12-22 02:40:11,319 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 02:40:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89014 states. [2020-12-22 02:40:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89014 to 87634. [2020-12-22 02:40:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87634 states. [2020-12-22 02:40:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87634 states to 87634 states and 90132 transitions. [2020-12-22 02:40:12,642 INFO L78 Accepts]: Start accepts. Automaton has 87634 states and 90132 transitions. Word has length 1558 [2020-12-22 02:40:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:40:12,644 INFO L481 AbstractCegarLoop]: Abstraction has 87634 states and 90132 transitions. [2020-12-22 02:40:12,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:40:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 87634 states and 90132 transitions. [2020-12-22 02:40:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1740 [2020-12-22 02:40:12,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:40:12,692 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:40:12,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 02:40:12,693 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:40:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:40:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1961468620, now seen corresponding path program 1 times [2020-12-22 02:40:12,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:40:12,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013855759] [2020-12-22 02:40:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:40:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:40:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4065 backedges. 1104 proven. 0 refuted. 0 times theorem prover too weak. 2961 trivial. 0 not checked. [2020-12-22 02:40:15,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013855759] [2020-12-22 02:40:15,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:40:15,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:40:15,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355868383] [2020-12-22 02:40:15,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:40:15,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:40:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:40:15,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:40:15,694 INFO L87 Difference]: Start difference. First operand 87634 states and 90132 transitions. Second operand 4 states. [2020-12-22 02:40:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:40:21,646 INFO L93 Difference]: Finished difference Result 176154 states and 181214 transitions. [2020-12-22 02:40:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 02:40:21,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1739 [2020-12-22 02:40:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:40:21,748 INFO L225 Difference]: With dead ends: 176154 [2020-12-22 02:40:21,749 INFO L226 Difference]: Without dead ends: 89212 [2020-12-22 02:40:21,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 02:40:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89212 states. [2020-12-22 02:40:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89212 to 88324. [2020-12-22 02:40:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88324 states. [2020-12-22 02:40:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88324 states to 88324 states and 90825 transitions. [2020-12-22 02:40:22,842 INFO L78 Accepts]: Start accepts. Automaton has 88324 states and 90825 transitions. Word has length 1739 [2020-12-22 02:40:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:40:22,843 INFO L481 AbstractCegarLoop]: Abstraction has 88324 states and 90825 transitions. [2020-12-22 02:40:22,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:40:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 88324 states and 90825 transitions. [2020-12-22 02:40:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1761 [2020-12-22 02:40:22,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:40:22,875 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:40:22,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 02:40:22,875 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:40:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:40:22,876 INFO L82 PathProgramCache]: Analyzing trace with hash 275883314, now seen corresponding path program 1 times [2020-12-22 02:40:22,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:40:22,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42470820] [2020-12-22 02:40:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:40:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:40:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 1878 proven. 0 refuted. 0 times theorem prover too weak. 1816 trivial. 0 not checked. [2020-12-22 02:40:25,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42470820] [2020-12-22 02:40:25,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:40:25,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:40:25,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666063604] [2020-12-22 02:40:25,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:40:25,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:40:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:40:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:40:25,638 INFO L87 Difference]: Start difference. First operand 88324 states and 90825 transitions. Second operand 3 states. [2020-12-22 02:40:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:40:32,062 INFO L93 Difference]: Finished difference Result 183546 states and 188788 transitions. [2020-12-22 02:40:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:40:32,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1760 [2020-12-22 02:40:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:40:32,182 INFO L225 Difference]: With dead ends: 183546 [2020-12-22 02:40:32,182 INFO L226 Difference]: Without dead ends: 95224 [2020-12-22 02:40:32,221 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 02:40:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95224 states. [2020-12-22 02:40:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95224 to 92464. [2020-12-22 02:40:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92464 states. [2020-12-22 02:40:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92464 states to 92464 states and 94960 transitions. [2020-12-22 02:40:33,624 INFO L78 Accepts]: Start accepts. Automaton has 92464 states and 94960 transitions. Word has length 1760 [2020-12-22 02:40:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:40:33,626 INFO L481 AbstractCegarLoop]: Abstraction has 92464 states and 94960 transitions. [2020-12-22 02:40:33,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:40:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 92464 states and 94960 transitions. [2020-12-22 02:40:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1823 [2020-12-22 02:40:33,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:40:33,689 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:40:33,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 02:40:33,690 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:40:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:40:33,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1036524502, now seen corresponding path program 1 times [2020-12-22 02:40:33,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:40:33,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133853639] [2020-12-22 02:40:33,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:40:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:40:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4092 backedges. 1701 proven. 1702 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-12-22 02:40:39,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133853639] [2020-12-22 02:40:39,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935476231] [2020-12-22 02:40:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:40:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:40:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:40:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates...