/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/Problem15_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:58:25,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:58:25,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:58:25,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:58:26,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 01:58:26,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 01:58:26,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 01:58:26,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 01:58:26,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 01:58:26,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 01:58:26,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 01:58:26,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 01:58:26,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 01:58:26,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 01:58:26,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 01:58:26,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 01:58:26,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 01:58:26,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:58:26,167 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:58:26,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:58:26,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:58:26,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:58:26,174 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:58:26,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:58:26,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:58:26,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:58:26,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:58:26,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:58:26,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:58:26,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:58:26,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:58:26,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:58:26,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:58:26,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:58:26,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:58:26,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:58:26,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:58:26,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:58:26,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:58:26,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:58:26,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:58:26,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:58:26,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:58:26,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:58:26,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:58:26,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:58:26,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:58:26,647 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:58:26,648 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:58:26,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label04.c [2020-12-22 01:58:26,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e110a9dbf/3ec31746d8f3435e8781041edc75cc2f/FLAGfc86199a8 [2020-12-22 01:58:27,633 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:58:27,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label04.c [2020-12-22 01:58:27,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e110a9dbf/3ec31746d8f3435e8781041edc75cc2f/FLAGfc86199a8 [2020-12-22 01:58:27,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e110a9dbf/3ec31746d8f3435e8781041edc75cc2f [2020-12-22 01:58:27,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:58:27,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:58:27,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:58:27,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:58:27,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:58:27,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:58:27" (1/1) ... [2020-12-22 01:58:27,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7151c12c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:27, skipping insertion in model container [2020-12-22 01:58:27,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:58:27" (1/1) ... [2020-12-22 01:58:27,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:58:27,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:58:28,053 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/Problem15_label04.c[3915,3928] [2020-12-22 01:58:28,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:58:28,737 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:58:28,782 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/Problem15_label04.c[3915,3928] [2020-12-22 01:58:29,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:58:29,062 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:58:29,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29 WrapperNode [2020-12-22 01:58:29,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:58:29,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:58:29,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:58:29,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:58:29,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:58:29,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:58:29,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:58:29,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:58:29,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... [2020-12-22 01:58:29,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:58:29,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:58:29,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:58:29,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:58:29,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:58:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:58:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:58:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:58:29,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:58:33,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:58:33,235 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 01:58:33,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:58:33 BoogieIcfgContainer [2020-12-22 01:58:33,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:58:33,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:58:33,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:58:33,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:58:33,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:58:27" (1/3) ... [2020-12-22 01:58:33,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e76b287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:58:33, skipping insertion in model container [2020-12-22 01:58:33,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:58:29" (2/3) ... [2020-12-22 01:58:33,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e76b287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:58:33, skipping insertion in model container [2020-12-22 01:58:33,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:58:33" (3/3) ... [2020-12-22 01:58:33,253 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label04.c [2020-12-22 01:58:33,264 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:58:33,270 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:58:33,292 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:58:33,325 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:58:33,325 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:58:33,325 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:58:33,325 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:58:33,326 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:58:33,326 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:58:33,326 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:58:33,326 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:58:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states. [2020-12-22 01:58:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 01:58:33,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:58:33,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:58:33,361 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:58:33,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:58:33,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2020-12-22 01:58:33,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:58:33,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726522223] [2020-12-22 01:58:33,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:58:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:58:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:58:33,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726522223] [2020-12-22 01:58:33,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:58:33,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:58:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724107026] [2020-12-22 01:58:33,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:58:33,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:58:33,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:58:33,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:33,735 INFO L87 Difference]: Start difference. First operand 424 states. Second operand 3 states. [2020-12-22 01:58:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:58:36,755 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2020-12-22 01:58:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:58:36,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-12-22 01:58:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:58:36,790 INFO L225 Difference]: With dead ends: 1154 [2020-12-22 01:58:36,793 INFO L226 Difference]: Without dead ends: 665 [2020-12-22 01:58:36,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:36,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2020-12-22 01:58:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2020-12-22 01:58:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2020-12-22 01:58:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2020-12-22 01:58:36,906 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 31 [2020-12-22 01:58:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:58:36,906 INFO L481 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2020-12-22 01:58:36,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:58:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2020-12-22 01:58:36,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 01:58:36,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:58:36,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:58:36,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:58:36,912 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:58:36,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:58:36,913 INFO L82 PathProgramCache]: Analyzing trace with hash 956840823, now seen corresponding path program 1 times [2020-12-22 01:58:36,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:58:36,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129933563] [2020-12-22 01:58:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:58:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:58:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:58:37,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129933563] [2020-12-22 01:58:37,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:58:37,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:58:37,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695251271] [2020-12-22 01:58:37,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:58:37,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:58:37,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:58:37,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:37,200 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand 3 states. [2020-12-22 01:58:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:58:39,627 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2020-12-22 01:58:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:58:39,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 01:58:39,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:58:39,634 INFO L225 Difference]: With dead ends: 1624 [2020-12-22 01:58:39,634 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 01:58:39,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 01:58:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2020-12-22 01:58:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 963 states. [2020-12-22 01:58:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2020-12-22 01:58:39,704 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 96 [2020-12-22 01:58:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:58:39,705 INFO L481 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2020-12-22 01:58:39,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:58:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2020-12-22 01:58:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 01:58:39,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:58:39,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:58:39,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:58:39,712 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:58:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:58:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1624776090, now seen corresponding path program 1 times [2020-12-22 01:58:39,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:58:39,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798850383] [2020-12-22 01:58:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:58:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:58:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:58:39,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798850383] [2020-12-22 01:58:39,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:58:39,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 01:58:39,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924410915] [2020-12-22 01:58:39,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 01:58:39,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:58:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 01:58:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:58:39,993 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand 5 states. [2020-12-22 01:58:43,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:58:43,071 INFO L93 Difference]: Finished difference Result 2248 states and 3205 transitions. [2020-12-22 01:58:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 01:58:43,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-12-22 01:58:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:58:43,083 INFO L225 Difference]: With dead ends: 2248 [2020-12-22 01:58:43,084 INFO L226 Difference]: Without dead ends: 1586 [2020-12-22 01:58:43,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 01:58:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2020-12-22 01:58:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1266. [2020-12-22 01:58:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1266 states. [2020-12-22 01:58:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2020-12-22 01:58:43,120 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 101 [2020-12-22 01:58:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:58:43,121 INFO L481 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2020-12-22 01:58:43,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 01:58:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2020-12-22 01:58:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-12-22 01:58:43,125 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:58:43,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:58:43,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:58:43,126 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:58:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:58:43,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1940235646, now seen corresponding path program 1 times [2020-12-22 01:58:43,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:58:43,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240051625] [2020-12-22 01:58:43,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:58:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:58:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:58:43,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240051625] [2020-12-22 01:58:43,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:58:43,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:58:43,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513141237] [2020-12-22 01:58:43,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:58:43,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:58:43,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:58:43,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:58:43,425 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand 4 states. [2020-12-22 01:58:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:58:47,898 INFO L93 Difference]: Finished difference Result 4670 states and 6170 transitions. [2020-12-22 01:58:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:58:47,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 197 [2020-12-22 01:58:47,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:58:47,917 INFO L225 Difference]: With dead ends: 4670 [2020-12-22 01:58:47,917 INFO L226 Difference]: Without dead ends: 3406 [2020-12-22 01:58:47,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:58:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2020-12-22 01:58:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3381. [2020-12-22 01:58:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3381 states. [2020-12-22 01:58:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4180 transitions. [2020-12-22 01:58:47,996 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4180 transitions. Word has length 197 [2020-12-22 01:58:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:58:47,999 INFO L481 AbstractCegarLoop]: Abstraction has 3381 states and 4180 transitions. [2020-12-22 01:58:47,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:58:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4180 transitions. [2020-12-22 01:58:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-22 01:58:48,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:58:48,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:58:48,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:58:48,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:58:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:58:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash -257680628, now seen corresponding path program 1 times [2020-12-22 01:58:48,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:58:48,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112221651] [2020-12-22 01:58:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:58:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:58:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 01:58:48,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112221651] [2020-12-22 01:58:48,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:58:48,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:58:48,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962585976] [2020-12-22 01:58:48,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:58:48,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:58:48,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:58:48,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:48,256 INFO L87 Difference]: Start difference. First operand 3381 states and 4180 transitions. Second operand 3 states. [2020-12-22 01:58:50,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:58:50,850 INFO L93 Difference]: Finished difference Result 8563 states and 10754 transitions. [2020-12-22 01:58:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:58:50,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2020-12-22 01:58:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:58:50,877 INFO L225 Difference]: With dead ends: 8563 [2020-12-22 01:58:50,877 INFO L226 Difference]: Without dead ends: 5483 [2020-12-22 01:58:50,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2020-12-22 01:58:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478. [2020-12-22 01:58:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5478 states. [2020-12-22 01:58:51,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6401 transitions. [2020-12-22 01:58:51,015 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6401 transitions. Word has length 201 [2020-12-22 01:58:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:58:51,016 INFO L481 AbstractCegarLoop]: Abstraction has 5478 states and 6401 transitions. [2020-12-22 01:58:51,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:58:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6401 transitions. [2020-12-22 01:58:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-12-22 01:58:51,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:58:51,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:58:51,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:58:51,023 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:58:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:58:51,024 INFO L82 PathProgramCache]: Analyzing trace with hash 593446436, now seen corresponding path program 1 times [2020-12-22 01:58:51,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:58:51,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452075687] [2020-12-22 01:58:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:58:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:58:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 01:58:51,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452075687] [2020-12-22 01:58:51,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:58:51,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:58:51,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863363109] [2020-12-22 01:58:51,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:58:51,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:58:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:58:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:51,583 INFO L87 Difference]: Start difference. First operand 5478 states and 6401 transitions. Second operand 3 states. [2020-12-22 01:58:54,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:58:54,405 INFO L93 Difference]: Finished difference Result 10655 states and 12489 transitions. [2020-12-22 01:58:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:58:54,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 303 [2020-12-22 01:58:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:58:54,432 INFO L225 Difference]: With dead ends: 10655 [2020-12-22 01:58:54,433 INFO L226 Difference]: Without dead ends: 5478 [2020-12-22 01:58:54,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2020-12-22 01:58:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478. [2020-12-22 01:58:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5478 states. [2020-12-22 01:58:54,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6395 transitions. [2020-12-22 01:58:54,554 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6395 transitions. Word has length 303 [2020-12-22 01:58:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:58:54,555 INFO L481 AbstractCegarLoop]: Abstraction has 5478 states and 6395 transitions. [2020-12-22 01:58:54,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:58:54,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6395 transitions. [2020-12-22 01:58:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-12-22 01:58:54,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:58:54,561 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:58:54,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:58:54,562 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:58:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:58:54,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1446697707, now seen corresponding path program 1 times [2020-12-22 01:58:54,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:58:54,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058445122] [2020-12-22 01:58:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:58:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:58:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 01:58:54,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058445122] [2020-12-22 01:58:54,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:58:54,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:58:54,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985562346] [2020-12-22 01:58:54,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:58:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:58:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:58:54,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:54,943 INFO L87 Difference]: Start difference. First operand 5478 states and 6395 transitions. Second operand 3 states. [2020-12-22 01:58:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:58:58,051 INFO L93 Difference]: Finished difference Result 11851 states and 14151 transitions. [2020-12-22 01:58:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:58:58,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-12-22 01:58:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:58:58,077 INFO L225 Difference]: With dead ends: 11851 [2020-12-22 01:58:58,078 INFO L226 Difference]: Without dead ends: 6674 [2020-12-22 01:58:58,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2020-12-22 01:58:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 4876. [2020-12-22 01:58:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4876 states. [2020-12-22 01:58:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 5755 transitions. [2020-12-22 01:58:58,187 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 5755 transitions. Word has length 318 [2020-12-22 01:58:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:58:58,188 INFO L481 AbstractCegarLoop]: Abstraction has 4876 states and 5755 transitions. [2020-12-22 01:58:58,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:58:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 5755 transitions. [2020-12-22 01:58:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-12-22 01:58:58,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:58:58,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:58:58,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:58:58,196 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:58:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:58:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash 958857170, now seen corresponding path program 1 times [2020-12-22 01:58:58,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:58:58,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529487984] [2020-12-22 01:58:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:58:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:58:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-22 01:58:58,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529487984] [2020-12-22 01:58:58,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:58:58,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:58:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971644403] [2020-12-22 01:58:58,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:58:58,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:58:58,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:58:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:58:58,551 INFO L87 Difference]: Start difference. First operand 4876 states and 5755 transitions. Second operand 3 states. [2020-12-22 01:59:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:01,315 INFO L93 Difference]: Finished difference Result 11857 states and 14254 transitions. [2020-12-22 01:59:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:59:01,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 377 [2020-12-22 01:59:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:01,348 INFO L225 Difference]: With dead ends: 11857 [2020-12-22 01:59:01,348 INFO L226 Difference]: Without dead ends: 7282 [2020-12-22 01:59:01,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7282 states. [2020-12-22 01:59:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7282 to 5483. [2020-12-22 01:59:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5483 states. [2020-12-22 01:59:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5483 states to 5483 states and 6686 transitions. [2020-12-22 01:59:01,462 INFO L78 Accepts]: Start accepts. Automaton has 5483 states and 6686 transitions. Word has length 377 [2020-12-22 01:59:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:01,463 INFO L481 AbstractCegarLoop]: Abstraction has 5483 states and 6686 transitions. [2020-12-22 01:59:01,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:59:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5483 states and 6686 transitions. [2020-12-22 01:59:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-12-22 01:59:01,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:01,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:59:01,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:59:01,472 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash 16466699, now seen corresponding path program 1 times [2020-12-22 01:59:01,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:01,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809147096] [2020-12-22 01:59:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:01,833 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 01:59:01,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809147096] [2020-12-22 01:59:01,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:59:01,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:59:01,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37228171] [2020-12-22 01:59:01,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:59:01,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:01,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:59:01,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:01,844 INFO L87 Difference]: Start difference. First operand 5483 states and 6686 transitions. Second operand 3 states. [2020-12-22 01:59:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:05,015 INFO L93 Difference]: Finished difference Result 11866 states and 14439 transitions. [2020-12-22 01:59:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:59:05,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 394 [2020-12-22 01:59:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:05,030 INFO L225 Difference]: With dead ends: 11866 [2020-12-22 01:59:05,031 INFO L226 Difference]: Without dead ends: 6684 [2020-12-22 01:59:05,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6684 states. [2020-12-22 01:59:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6684 to 6382. [2020-12-22 01:59:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6382 states. [2020-12-22 01:59:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 7264 transitions. [2020-12-22 01:59:05,146 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 7264 transitions. Word has length 394 [2020-12-22 01:59:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:05,147 INFO L481 AbstractCegarLoop]: Abstraction has 6382 states and 7264 transitions. [2020-12-22 01:59:05,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:59:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 7264 transitions. [2020-12-22 01:59:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-12-22 01:59:05,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:05,157 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 01:59:05,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:59:05,157 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1606656830, now seen corresponding path program 1 times [2020-12-22 01:59:05,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:05,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089795399] [2020-12-22 01:59:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-12-22 01:59:05,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089795399] [2020-12-22 01:59:05,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:59:05,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 01:59:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836269672] [2020-12-22 01:59:05,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 01:59:05,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:05,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 01:59:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:59:05,631 INFO L87 Difference]: Start difference. First operand 6382 states and 7264 transitions. Second operand 5 states. [2020-12-22 01:59:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:08,964 INFO L93 Difference]: Finished difference Result 14318 states and 16571 transitions. [2020-12-22 01:59:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:59:08,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 399 [2020-12-22 01:59:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:08,983 INFO L225 Difference]: With dead ends: 14318 [2020-12-22 01:59:08,983 INFO L226 Difference]: Without dead ends: 8237 [2020-12-22 01:59:08,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:59:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8237 states. [2020-12-22 01:59:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8237 to 8174. [2020-12-22 01:59:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8174 states. [2020-12-22 01:59:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8174 states to 8174 states and 9197 transitions. [2020-12-22 01:59:09,144 INFO L78 Accepts]: Start accepts. Automaton has 8174 states and 9197 transitions. Word has length 399 [2020-12-22 01:59:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:09,145 INFO L481 AbstractCegarLoop]: Abstraction has 8174 states and 9197 transitions. [2020-12-22 01:59:09,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 01:59:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 8174 states and 9197 transitions. [2020-12-22 01:59:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-12-22 01:59:09,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:09,152 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:59:09,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:59:09,152 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:09,153 INFO L82 PathProgramCache]: Analyzing trace with hash -204355091, now seen corresponding path program 1 times [2020-12-22 01:59:09,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:09,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193838890] [2020-12-22 01:59:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-22 01:59:09,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193838890] [2020-12-22 01:59:09,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:59:09,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:59:09,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626776890] [2020-12-22 01:59:09,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:59:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:59:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:09,620 INFO L87 Difference]: Start difference. First operand 8174 states and 9197 transitions. Second operand 3 states. [2020-12-22 01:59:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:12,530 INFO L93 Difference]: Finished difference Result 18139 states and 20756 transitions. [2020-12-22 01:59:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:59:12,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-12-22 01:59:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:12,552 INFO L225 Difference]: With dead ends: 18139 [2020-12-22 01:59:12,552 INFO L226 Difference]: Without dead ends: 10266 [2020-12-22 01:59:12,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10266 states. [2020-12-22 01:59:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10266 to 10266. [2020-12-22 01:59:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10266 states. [2020-12-22 01:59:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10266 states to 10266 states and 11694 transitions. [2020-12-22 01:59:12,716 INFO L78 Accepts]: Start accepts. Automaton has 10266 states and 11694 transitions. Word has length 495 [2020-12-22 01:59:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:12,718 INFO L481 AbstractCegarLoop]: Abstraction has 10266 states and 11694 transitions. [2020-12-22 01:59:12,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:59:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 10266 states and 11694 transitions. [2020-12-22 01:59:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-12-22 01:59:12,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:12,728 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:59:12,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:59:12,728 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:12,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1199657310, now seen corresponding path program 1 times [2020-12-22 01:59:12,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:12,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590007533] [2020-12-22 01:59:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 554 proven. 39 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 01:59:13,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590007533] [2020-12-22 01:59:13,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222245503] [2020-12-22 01:59:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:59:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:13,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 01:59:13,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:59:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 593 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-22 01:59:15,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:59:15,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 01:59:15,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868057840] [2020-12-22 01:59:15,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:59:15,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:15,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:59:15,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:59:15,234 INFO L87 Difference]: Start difference. First operand 10266 states and 11694 transitions. Second operand 4 states. [2020-12-22 01:59:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:19,131 INFO L93 Difference]: Finished difference Result 22327 states and 25346 transitions. [2020-12-22 01:59:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:59:19,135 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 586 [2020-12-22 01:59:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:19,160 INFO L225 Difference]: With dead ends: 22327 [2020-12-22 01:59:19,160 INFO L226 Difference]: Without dead ends: 11764 [2020-12-22 01:59:19,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:59:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11764 states. [2020-12-22 01:59:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11764 to 11163. [2020-12-22 01:59:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11163 states. [2020-12-22 01:59:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11163 states to 11163 states and 12625 transitions. [2020-12-22 01:59:19,407 INFO L78 Accepts]: Start accepts. Automaton has 11163 states and 12625 transitions. Word has length 586 [2020-12-22 01:59:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:19,408 INFO L481 AbstractCegarLoop]: Abstraction has 11163 states and 12625 transitions. [2020-12-22 01:59:19,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:59:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 11163 states and 12625 transitions. [2020-12-22 01:59:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2020-12-22 01:59:19,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:19,419 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 01:59:19,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 01:59:19,635 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:19,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:19,635 INFO L82 PathProgramCache]: Analyzing trace with hash 444051116, now seen corresponding path program 1 times [2020-12-22 01:59:19,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:19,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727774411] [2020-12-22 01:59:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 01:59:20,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727774411] [2020-12-22 01:59:20,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:59:20,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:59:20,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10624721] [2020-12-22 01:59:20,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:59:20,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:20,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:59:20,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:20,252 INFO L87 Difference]: Start difference. First operand 11163 states and 12625 transitions. Second operand 3 states. [2020-12-22 01:59:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:23,741 INFO L93 Difference]: Finished difference Result 22322 states and 25246 transitions. [2020-12-22 01:59:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:59:23,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 628 [2020-12-22 01:59:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:23,768 INFO L225 Difference]: With dead ends: 22322 [2020-12-22 01:59:23,768 INFO L226 Difference]: Without dead ends: 11161 [2020-12-22 01:59:23,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11161 states. [2020-12-22 01:59:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11161 to 11161. [2020-12-22 01:59:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11161 states. [2020-12-22 01:59:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11161 states to 11161 states and 12621 transitions. [2020-12-22 01:59:23,963 INFO L78 Accepts]: Start accepts. Automaton has 11161 states and 12621 transitions. Word has length 628 [2020-12-22 01:59:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:23,964 INFO L481 AbstractCegarLoop]: Abstraction has 11161 states and 12621 transitions. [2020-12-22 01:59:23,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:59:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 11161 states and 12621 transitions. [2020-12-22 01:59:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2020-12-22 01:59:23,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:23,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:59:23,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:59:23,981 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1737174082, now seen corresponding path program 1 times [2020-12-22 01:59:23,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:23,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736027778] [2020-12-22 01:59:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2020-12-22 01:59:24,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736027778] [2020-12-22 01:59:24,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:59:24,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:59:24,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35212306] [2020-12-22 01:59:24,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:59:24,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:24,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:59:24,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:24,528 INFO L87 Difference]: Start difference. First operand 11161 states and 12621 transitions. Second operand 3 states. [2020-12-22 01:59:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:28,351 INFO L93 Difference]: Finished difference Result 27402 states and 31088 transitions. [2020-12-22 01:59:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:59:28,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 656 [2020-12-22 01:59:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:28,380 INFO L225 Difference]: With dead ends: 27402 [2020-12-22 01:59:28,380 INFO L226 Difference]: Without dead ends: 16243 [2020-12-22 01:59:28,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:28,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16243 states. [2020-12-22 01:59:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16243 to 13551. [2020-12-22 01:59:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13551 states. [2020-12-22 01:59:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13551 states to 13551 states and 15265 transitions. [2020-12-22 01:59:28,603 INFO L78 Accepts]: Start accepts. Automaton has 13551 states and 15265 transitions. Word has length 656 [2020-12-22 01:59:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:28,604 INFO L481 AbstractCegarLoop]: Abstraction has 13551 states and 15265 transitions. [2020-12-22 01:59:28,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:59:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 13551 states and 15265 transitions. [2020-12-22 01:59:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2020-12-22 01:59:28,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:28,616 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:59:28,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 01:59:28,617 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash -297771134, now seen corresponding path program 1 times [2020-12-22 01:59:28,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:28,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055351741] [2020-12-22 01:59:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2020-12-22 01:59:29,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055351741] [2020-12-22 01:59:29,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:59:29,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:59:29,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12125895] [2020-12-22 01:59:29,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:59:29,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:29,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:59:29,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:29,218 INFO L87 Difference]: Start difference. First operand 13551 states and 15265 transitions. Second operand 3 states. [2020-12-22 01:59:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:32,590 INFO L93 Difference]: Finished difference Result 29195 states and 33234 transitions. [2020-12-22 01:59:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:59:32,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 662 [2020-12-22 01:59:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:32,620 INFO L225 Difference]: With dead ends: 29195 [2020-12-22 01:59:32,620 INFO L226 Difference]: Without dead ends: 15646 [2020-12-22 01:59:32,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:59:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15646 states. [2020-12-22 01:59:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15646 to 15347. [2020-12-22 01:59:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15347 states. [2020-12-22 01:59:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15347 states to 15347 states and 17010 transitions. [2020-12-22 01:59:32,842 INFO L78 Accepts]: Start accepts. Automaton has 15347 states and 17010 transitions. Word has length 662 [2020-12-22 01:59:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:32,843 INFO L481 AbstractCegarLoop]: Abstraction has 15347 states and 17010 transitions. [2020-12-22 01:59:32,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:59:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 15347 states and 17010 transitions. [2020-12-22 01:59:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2020-12-22 01:59:32,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:32,858 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:59:32,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 01:59:32,858 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:32,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1894546033, now seen corresponding path program 1 times [2020-12-22 01:59:32,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:32,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104835817] [2020-12-22 01:59:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 530 proven. 190 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 01:59:33,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104835817] [2020-12-22 01:59:33,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013983320] [2020-12-22 01:59:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:59:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:34,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 01:59:34,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:59:34,466 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-22 01:59:34,466 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 01:59:34,470 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 01:59:34,481 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:59:34,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 01:59:34,495 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:59:34,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 01:59:34,515 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 01:59:34,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 01:59:34,539 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 01:59:34,595 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 01:59:34,624 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 01:59:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 635 proven. 85 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 01:59:35,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 01:59:35,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 01:59:35,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691653766] [2020-12-22 01:59:35,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 01:59:35,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:35,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 01:59:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:59:35,229 INFO L87 Difference]: Start difference. First operand 15347 states and 17010 transitions. Second operand 7 states. [2020-12-22 01:59:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:59:56,914 INFO L93 Difference]: Finished difference Result 46934 states and 52513 transitions. [2020-12-22 01:59:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 01:59:56,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 663 [2020-12-22 01:59:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:59:56,961 INFO L225 Difference]: With dead ends: 46934 [2020-12-22 01:59:56,962 INFO L226 Difference]: Without dead ends: 31589 [2020-12-22 01:59:56,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-22 01:59:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31589 states. [2020-12-22 01:59:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31589 to 26130. [2020-12-22 01:59:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26130 states. [2020-12-22 01:59:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26130 states to 26130 states and 28982 transitions. [2020-12-22 01:59:57,398 INFO L78 Accepts]: Start accepts. Automaton has 26130 states and 28982 transitions. Word has length 663 [2020-12-22 01:59:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:59:57,399 INFO L481 AbstractCegarLoop]: Abstraction has 26130 states and 28982 transitions. [2020-12-22 01:59:57,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 01:59:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 26130 states and 28982 transitions. [2020-12-22 01:59:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2020-12-22 01:59:57,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:59:57,416 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:59:57,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 01:59:57,632 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:59:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:59:57,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1049992847, now seen corresponding path program 1 times [2020-12-22 01:59:57,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:59:57,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796219049] [2020-12-22 01:59:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:59:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:59:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 511 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-12-22 01:59:58,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796219049] [2020-12-22 01:59:58,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:59:58,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 01:59:58,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134434324] [2020-12-22 01:59:58,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:59:58,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:59:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:59:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:59:58,516 INFO L87 Difference]: Start difference. First operand 26130 states and 28982 transitions. Second operand 4 states. [2020-12-22 02:00:05,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:00:05,086 INFO L93 Difference]: Finished difference Result 62132 states and 68710 transitions. [2020-12-22 02:00:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:00:05,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 712 [2020-12-22 02:00:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:00:05,148 INFO L225 Difference]: With dead ends: 62132 [2020-12-22 02:00:05,148 INFO L226 Difference]: Without dead ends: 36004 [2020-12-22 02:00:05,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:00:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36004 states. [2020-12-22 02:00:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36004 to 29124. [2020-12-22 02:00:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29124 states. [2020-12-22 02:00:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29124 states to 29124 states and 32251 transitions. [2020-12-22 02:00:05,658 INFO L78 Accepts]: Start accepts. Automaton has 29124 states and 32251 transitions. Word has length 712 [2020-12-22 02:00:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:00:05,659 INFO L481 AbstractCegarLoop]: Abstraction has 29124 states and 32251 transitions. [2020-12-22 02:00:05,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:00:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 29124 states and 32251 transitions. [2020-12-22 02:00:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2020-12-22 02:00:05,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:00:05,675 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:00:05,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 02:00:05,675 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:00:05,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:00:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash 255775377, now seen corresponding path program 1 times [2020-12-22 02:00:05,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:00:05,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10103713] [2020-12-22 02:00:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:00:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:00:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2020-12-22 02:00:06,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10103713] [2020-12-22 02:00:06,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:00:06,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:00:06,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974009287] [2020-12-22 02:00:06,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:00:06,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:00:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:00:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:00:06,580 INFO L87 Difference]: Start difference. First operand 29124 states and 32251 transitions. Second operand 3 states. [2020-12-22 02:00:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:00:11,994 INFO L93 Difference]: Finished difference Result 58259 states and 64514 transitions. [2020-12-22 02:00:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:00:11,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 725 [2020-12-22 02:00:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:00:12,032 INFO L225 Difference]: With dead ends: 58259 [2020-12-22 02:00:12,033 INFO L226 Difference]: Without dead ends: 28838 [2020-12-22 02:00:12,052 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 02:00:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28838 states. [2020-12-22 02:00:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28838 to 26132. [2020-12-22 02:00:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26132 states. [2020-12-22 02:00:12,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26132 states to 26132 states and 28540 transitions. [2020-12-22 02:00:12,583 INFO L78 Accepts]: Start accepts. Automaton has 26132 states and 28540 transitions. Word has length 725 [2020-12-22 02:00:12,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:00:12,584 INFO L481 AbstractCegarLoop]: Abstraction has 26132 states and 28540 transitions. [2020-12-22 02:00:12,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:00:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 26132 states and 28540 transitions. [2020-12-22 02:00:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2020-12-22 02:00:12,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:00:12,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 02:00:12,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:00:12,715 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:00:12,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:00:12,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1001674660, now seen corresponding path program 1 times [2020-12-22 02:00:12,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:00:12,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527779341] [2020-12-22 02:00:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:00:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:00:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 519 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-12-22 02:00:13,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527779341] [2020-12-22 02:00:13,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:00:13,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:00:13,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706002262] [2020-12-22 02:00:13,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:00:13,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:00:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:00:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:00:13,634 INFO L87 Difference]: Start difference. First operand 26132 states and 28540 transitions. Second operand 3 states. [2020-12-22 02:00:18,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:00:18,849 INFO L93 Difference]: Finished difference Result 59750 states and 65176 transitions. [2020-12-22 02:00:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:00:18,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 739 [2020-12-22 02:00:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:00:18,898 INFO L225 Difference]: With dead ends: 59750 [2020-12-22 02:00:18,898 INFO L226 Difference]: Without dead ends: 29733 [2020-12-22 02:00:18,920 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 02:00:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29733 states. [2020-12-22 02:00:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29733 to 28835. [2020-12-22 02:00:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28835 states. [2020-12-22 02:00:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28835 states to 28835 states and 31061 transitions. [2020-12-22 02:00:19,357 INFO L78 Accepts]: Start accepts. Automaton has 28835 states and 31061 transitions. Word has length 739 [2020-12-22 02:00:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:00:19,358 INFO L481 AbstractCegarLoop]: Abstraction has 28835 states and 31061 transitions. [2020-12-22 02:00:19,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:00:19,358 INFO L276 IsEmpty]: Start isEmpty. Operand 28835 states and 31061 transitions. [2020-12-22 02:00:19,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2020-12-22 02:00:19,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:00:19,378 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:19,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 02:00:19,378 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:00:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:00:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash 619216055, now seen corresponding path program 1 times [2020-12-22 02:00:19,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:00:19,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730180105] [2020-12-22 02:00:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:00:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:00:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-22 02:00:20,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730180105] [2020-12-22 02:00:20,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:00:20,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:00:20,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429057996] [2020-12-22 02:00:20,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:00:20,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:00:20,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:00:20,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:00:20,084 INFO L87 Difference]: Start difference. First operand 28835 states and 31061 transitions. Second operand 3 states. [2020-12-22 02:00:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:00:25,735 INFO L93 Difference]: Finished difference Result 65460 states and 70594 transitions. [2020-12-22 02:00:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:00:25,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 752 [2020-12-22 02:00:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:00:25,779 INFO L225 Difference]: With dead ends: 65460 [2020-12-22 02:00:25,780 INFO L226 Difference]: Without dead ends: 36926 [2020-12-22 02:00:25,797 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 02:00:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36926 states. [2020-12-22 02:00:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36926 to 33916. [2020-12-22 02:00:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33916 states. [2020-12-22 02:00:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33916 states to 33916 states and 36617 transitions. [2020-12-22 02:00:26,195 INFO L78 Accepts]: Start accepts. Automaton has 33916 states and 36617 transitions. Word has length 752 [2020-12-22 02:00:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:00:26,196 INFO L481 AbstractCegarLoop]: Abstraction has 33916 states and 36617 transitions. [2020-12-22 02:00:26,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:00:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 33916 states and 36617 transitions. [2020-12-22 02:00:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2020-12-22 02:00:26,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:00:26,212 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 02:00:26,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 02:00:26,212 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:00:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:00:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1052138887, now seen corresponding path program 1 times [2020-12-22 02:00:26,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:00:26,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088846797] [2020-12-22 02:00:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:00:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:00:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2020-12-22 02:00:27,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088846797] [2020-12-22 02:00:27,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:00:27,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:00:27,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750709304] [2020-12-22 02:00:27,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:00:27,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:00:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:00:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:00:27,445 INFO L87 Difference]: Start difference. First operand 33916 states and 36617 transitions. Second operand 3 states. [2020-12-22 02:00:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:00:32,961 INFO L93 Difference]: Finished difference Result 75615 states and 81478 transitions. [2020-12-22 02:00:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:00:32,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 765 [2020-12-22 02:00:32,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:00:33,009 INFO L225 Difference]: With dead ends: 75615 [2020-12-22 02:00:33,009 INFO L226 Difference]: Without dead ends: 42000 [2020-12-22 02:00:33,030 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 02:00:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42000 states. [2020-12-22 02:00:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42000 to 37799. [2020-12-22 02:00:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37799 states. [2020-12-22 02:00:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37799 states to 37799 states and 40637 transitions. [2020-12-22 02:00:33,502 INFO L78 Accepts]: Start accepts. Automaton has 37799 states and 40637 transitions. Word has length 765 [2020-12-22 02:00:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:00:33,503 INFO L481 AbstractCegarLoop]: Abstraction has 37799 states and 40637 transitions. [2020-12-22 02:00:33,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:00:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 37799 states and 40637 transitions. [2020-12-22 02:00:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-12-22 02:00:33,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:00:33,518 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 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] [2020-12-22 02:00:33,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 02:00:33,518 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:00:33,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:00:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash -713777869, now seen corresponding path program 1 times [2020-12-22 02:00:33,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:00:33,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812854786] [2020-12-22 02:00:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:00:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:00:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 922 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-12-22 02:00:34,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812854786] [2020-12-22 02:00:34,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:00:34,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:00:34,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964801563] [2020-12-22 02:00:34,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:00:34,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:00:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:00:34,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:00:34,406 INFO L87 Difference]: Start difference. First operand 37799 states and 40637 transitions. Second operand 4 states. [2020-12-22 02:00:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:00:42,502 INFO L93 Difference]: Finished difference Result 86653 states and 92943 transitions. [2020-12-22 02:00:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:00:42,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 801 [2020-12-22 02:00:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:00:42,543 INFO L225 Difference]: With dead ends: 86653 [2020-12-22 02:00:42,544 INFO L226 Difference]: Without dead ends: 38391 [2020-12-22 02:00:42,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:00:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38391 states. [2020-12-22 02:00:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38391 to 30317. [2020-12-22 02:00:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30317 states. [2020-12-22 02:00:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30317 states to 30317 states and 31599 transitions. [2020-12-22 02:00:42,974 INFO L78 Accepts]: Start accepts. Automaton has 30317 states and 31599 transitions. Word has length 801 [2020-12-22 02:00:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:00:42,975 INFO L481 AbstractCegarLoop]: Abstraction has 30317 states and 31599 transitions. [2020-12-22 02:00:42,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:00:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 30317 states and 31599 transitions. [2020-12-22 02:00:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 929 [2020-12-22 02:00:42,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:00:42,992 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, 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, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 02:00:42,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 02:00:42,992 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:00:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:00:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash 174999984, now seen corresponding path program 1 times [2020-12-22 02:00:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:00:42,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103420266] [2020-12-22 02:00:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:00:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:00:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1719 backedges. 595 proven. 606 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-12-22 02:00:45,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103420266] [2020-12-22 02:00:45,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748570976] [2020-12-22 02:00:45,747 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 02:00:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:00:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 02:00:46,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:00:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1719 backedges. 743 proven. 0 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2020-12-22 02:00:49,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 02:00:49,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 02:00:49,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99396451] [2020-12-22 02:00:49,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:00:49,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:00:49,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:00:49,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:00:49,111 INFO L87 Difference]: Start difference. First operand 30317 states and 31599 transitions. Second operand 3 states. [2020-12-22 02:00:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:00:53,870 INFO L93 Difference]: Finished difference Result 59427 states and 61974 transitions. [2020-12-22 02:00:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:00:53,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 928 [2020-12-22 02:00:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:00:53,906 INFO L225 Difference]: With dead ends: 59427 [2020-12-22 02:00:53,906 INFO L226 Difference]: Without dead ends: 29710 [2020-12-22 02:00:53,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 928 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:00:53,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29710 states. [2020-12-22 02:00:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29710 to 29411. [2020-12-22 02:00:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29411 states. [2020-12-22 02:00:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29411 states to 29411 states and 30191 transitions. [2020-12-22 02:00:54,317 INFO L78 Accepts]: Start accepts. Automaton has 29411 states and 30191 transitions. Word has length 928 [2020-12-22 02:00:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:00:54,318 INFO L481 AbstractCegarLoop]: Abstraction has 29411 states and 30191 transitions. [2020-12-22 02:00:54,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:00:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 29411 states and 30191 transitions. [2020-12-22 02:00:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2020-12-22 02:00:54,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:00:54,336 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 02:00:54,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 02:00:54,543 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:00:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:00:54,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1053481153, now seen corresponding path program 1 times [2020-12-22 02:00:54,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:00:54,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452922782] [2020-12-22 02:00:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:00:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:00:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 738 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2020-12-22 02:00:56,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452922782] [2020-12-22 02:00:56,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:00:56,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:00:56,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278918407] [2020-12-22 02:00:56,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:00:56,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:00:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:00:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:00:56,016 INFO L87 Difference]: Start difference. First operand 29411 states and 30191 transitions. Second operand 4 states. [2020-12-22 02:01:03,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:01:03,064 INFO L93 Difference]: Finished difference Result 61218 states and 62856 transitions. [2020-12-22 02:01:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:01:03,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 939 [2020-12-22 02:01:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:01:03,114 INFO L225 Difference]: With dead ends: 61218 [2020-12-22 02:01:03,115 INFO L226 Difference]: Without dead ends: 32407 [2020-12-22 02:01:03,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:01:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32407 states. [2020-12-22 02:01:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32407 to 29712. [2020-12-22 02:01:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29712 states. [2020-12-22 02:01:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29712 states to 29712 states and 30497 transitions. [2020-12-22 02:01:03,701 INFO L78 Accepts]: Start accepts. Automaton has 29712 states and 30497 transitions. Word has length 939 [2020-12-22 02:01:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:01:03,702 INFO L481 AbstractCegarLoop]: Abstraction has 29712 states and 30497 transitions. [2020-12-22 02:01:03,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:01:03,702 INFO L276 IsEmpty]: Start isEmpty. Operand 29712 states and 30497 transitions. [2020-12-22 02:01:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2020-12-22 02:01:03,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:01:03,750 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:01:03,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 02:01:03,751 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:01:03,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:01:03,752 INFO L82 PathProgramCache]: Analyzing trace with hash -390225527, now seen corresponding path program 1 times [2020-12-22 02:01:03,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:01:03,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335290033] [2020-12-22 02:01:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:01:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:01:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 776 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-12-22 02:01:05,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335290033] [2020-12-22 02:01:05,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:01:05,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:01:05,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063458640] [2020-12-22 02:01:05,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:01:05,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:01:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:01:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:01:05,233 INFO L87 Difference]: Start difference. First operand 29712 states and 30497 transitions. Second operand 3 states. [2020-12-22 02:01:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:01:10,111 INFO L93 Difference]: Finished difference Result 60325 states and 61921 transitions. [2020-12-22 02:01:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:01:10,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 963 [2020-12-22 02:01:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:01:10,146 INFO L225 Difference]: With dead ends: 60325 [2020-12-22 02:01:10,146 INFO L226 Difference]: Without dead ends: 31213 [2020-12-22 02:01:10,164 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 02:01:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31213 states. [2020-12-22 02:01:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31213 to 29711. [2020-12-22 02:01:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29711 states. [2020-12-22 02:01:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29711 states to 29711 states and 30470 transitions. [2020-12-22 02:01:10,466 INFO L78 Accepts]: Start accepts. Automaton has 29711 states and 30470 transitions. Word has length 963 [2020-12-22 02:01:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:01:10,467 INFO L481 AbstractCegarLoop]: Abstraction has 29711 states and 30470 transitions. [2020-12-22 02:01:10,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:01:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 29711 states and 30470 transitions. [2020-12-22 02:01:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2020-12-22 02:01:10,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:01:10,493 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 02:01:10,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 02:01:10,494 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:01:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:01:10,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2040123453, now seen corresponding path program 1 times [2020-12-22 02:01:10,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:01:10,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877877213] [2020-12-22 02:01:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:01:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:01:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 805 proven. 0 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2020-12-22 02:01:11,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877877213] [2020-12-22 02:01:11,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:01:11,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:01:11,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292182166] [2020-12-22 02:01:11,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:01:11,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:01:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:01:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:01:11,985 INFO L87 Difference]: Start difference. First operand 29711 states and 30470 transitions. Second operand 3 states. [2020-12-22 02:01:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:01:17,252 INFO L93 Difference]: Finished difference Result 63307 states and 64934 transitions. [2020-12-22 02:01:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:01:17,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 975 [2020-12-22 02:01:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:01:17,298 INFO L225 Difference]: With dead ends: 63307 [2020-12-22 02:01:17,298 INFO L226 Difference]: Without dead ends: 34196 [2020-12-22 02:01:17,316 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 02:01:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34196 states. [2020-12-22 02:01:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34196 to 28509. [2020-12-22 02:01:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28509 states. [2020-12-22 02:01:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28509 states to 28509 states and 29168 transitions. [2020-12-22 02:01:17,652 INFO L78 Accepts]: Start accepts. Automaton has 28509 states and 29168 transitions. Word has length 975 [2020-12-22 02:01:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:01:17,653 INFO L481 AbstractCegarLoop]: Abstraction has 28509 states and 29168 transitions. [2020-12-22 02:01:17,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:01:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 28509 states and 29168 transitions. [2020-12-22 02:01:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2020-12-22 02:01:17,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:01:17,674 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:01:17,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 02:01:17,674 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:01:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:01:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1800342180, now seen corresponding path program 1 times [2020-12-22 02:01:17,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:01:17,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377012226] [2020-12-22 02:01:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:01:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:01:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 115 proven. 757 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-12-22 02:01:19,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377012226] [2020-12-22 02:01:19,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830275471] [2020-12-22 02:01:19,823 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 02:01:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:01:20,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:01:20,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:01:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1603 backedges. 29 proven. 843 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-12-22 02:01:25,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:01:25,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 02:01:25,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319580579] [2020-12-22 02:01:25,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 02:01:25,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:01:25,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 02:01:25,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:01:25,643 INFO L87 Difference]: Start difference. First operand 28509 states and 29168 transitions. Second operand 8 states. [2020-12-22 02:01:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:01:39,687 INFO L93 Difference]: Finished difference Result 70806 states and 72401 transitions. [2020-12-22 02:01:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 02:01:39,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1059 [2020-12-22 02:01:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:01:39,739 INFO L225 Difference]: With dead ends: 70806 [2020-12-22 02:01:39,739 INFO L226 Difference]: Without dead ends: 42897 [2020-12-22 02:01:39,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-12-22 02:01:39,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42897 states. [2020-12-22 02:01:40,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42897 to 33301. [2020-12-22 02:01:40,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33301 states. [2020-12-22 02:01:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33301 states to 33301 states and 34072 transitions. [2020-12-22 02:01:40,174 INFO L78 Accepts]: Start accepts. Automaton has 33301 states and 34072 transitions. Word has length 1059 [2020-12-22 02:01:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:01:40,174 INFO L481 AbstractCegarLoop]: Abstraction has 33301 states and 34072 transitions. [2020-12-22 02:01:40,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 02:01:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33301 states and 34072 transitions. [2020-12-22 02:01:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1170 [2020-12-22 02:01:40,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:01:40,199 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 02:01:40,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:01:40,408 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:01:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:01:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash 613220827, now seen corresponding path program 1 times [2020-12-22 02:01:40,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:01:40,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018221134] [2020-12-22 02:01:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:01:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:01:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1963 backedges. 990 proven. 0 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2020-12-22 02:01:42,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018221134] [2020-12-22 02:01:42,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:01:42,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:01:42,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696531415] [2020-12-22 02:01:42,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:01:42,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:01:42,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:01:42,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:01:42,051 INFO L87 Difference]: Start difference. First operand 33301 states and 34072 transitions. Second operand 4 states. [2020-12-22 02:01:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:01:50,556 INFO L93 Difference]: Finished difference Result 69896 states and 71507 transitions. [2020-12-22 02:01:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:01:50,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1169 [2020-12-22 02:01:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:01:50,601 INFO L225 Difference]: With dead ends: 69896 [2020-12-22 02:01:50,601 INFO L226 Difference]: Without dead ends: 37195 [2020-12-22 02:01:50,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:01:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37195 states. [2020-12-22 02:01:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37195 to 33000. [2020-12-22 02:01:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33000 states. [2020-12-22 02:01:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33000 states to 33000 states and 33757 transitions. [2020-12-22 02:01:51,002 INFO L78 Accepts]: Start accepts. Automaton has 33000 states and 33757 transitions. Word has length 1169 [2020-12-22 02:01:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:01:51,003 INFO L481 AbstractCegarLoop]: Abstraction has 33000 states and 33757 transitions. [2020-12-22 02:01:51,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:01:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 33000 states and 33757 transitions. [2020-12-22 02:01:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1210 [2020-12-22 02:01:51,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:01:51,036 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, 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, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:01:51,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 02:01:51,036 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:01:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:01:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1916868797, now seen corresponding path program 1 times [2020-12-22 02:01:51,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:01:51,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655124593] [2020-12-22 02:01:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:01:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:01:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3199 backedges. 2481 proven. 0 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2020-12-22 02:01:52,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655124593] [2020-12-22 02:01:52,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:01:52,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:01:52,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246459070] [2020-12-22 02:01:52,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:01:52,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:01:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:01:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:01:52,782 INFO L87 Difference]: Start difference. First operand 33000 states and 33757 transitions. Second operand 4 states. [2020-12-22 02:02:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:01,753 INFO L93 Difference]: Finished difference Result 73478 states and 75142 transitions. [2020-12-22 02:02:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:02:01,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1209 [2020-12-22 02:02:01,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:01,802 INFO L225 Difference]: With dead ends: 73478 [2020-12-22 02:02:01,802 INFO L226 Difference]: Without dead ends: 36286 [2020-12-22 02:02:01,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:02:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36286 states. [2020-12-22 02:02:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36286 to 28202. [2020-12-22 02:02:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28202 states. [2020-12-22 02:02:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28202 states to 28202 states and 28772 transitions. [2020-12-22 02:02:02,171 INFO L78 Accepts]: Start accepts. Automaton has 28202 states and 28772 transitions. Word has length 1209 [2020-12-22 02:02:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:02,172 INFO L481 AbstractCegarLoop]: Abstraction has 28202 states and 28772 transitions. [2020-12-22 02:02:02,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:02:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 28202 states and 28772 transitions. [2020-12-22 02:02:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1282 [2020-12-22 02:02:02,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:02,199 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, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:02:02,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 02:02:02,200 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:02,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:02,201 INFO L82 PathProgramCache]: Analyzing trace with hash -558046323, now seen corresponding path program 1 times [2020-12-22 02:02:02,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:02,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193112352] [2020-12-22 02:02:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 2340 proven. 0 refuted. 0 times theorem prover too weak. 1146 trivial. 0 not checked. [2020-12-22 02:02:04,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193112352] [2020-12-22 02:02:04,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:04,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:04,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430292854] [2020-12-22 02:02:04,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:04,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:04,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:04,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:04,018 INFO L87 Difference]: Start difference. First operand 28202 states and 28772 transitions. Second operand 3 states. [2020-12-22 02:02:08,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:08,338 INFO L93 Difference]: Finished difference Result 48890 states and 49924 transitions. [2020-12-22 02:02:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:08,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1281 [2020-12-22 02:02:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:08,365 INFO L225 Difference]: With dead ends: 48890 [2020-12-22 02:02:08,365 INFO L226 Difference]: Without dead ends: 21288 [2020-12-22 02:02:08,381 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 02:02:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21288 states. [2020-12-22 02:02:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21288 to 19489. [2020-12-22 02:02:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19489 states. [2020-12-22 02:02:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19489 states to 19489 states and 19890 transitions. [2020-12-22 02:02:08,634 INFO L78 Accepts]: Start accepts. Automaton has 19489 states and 19890 transitions. Word has length 1281 [2020-12-22 02:02:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:08,634 INFO L481 AbstractCegarLoop]: Abstraction has 19489 states and 19890 transitions. [2020-12-22 02:02:08,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 19489 states and 19890 transitions. [2020-12-22 02:02:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1674 [2020-12-22 02:02:08,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:02:08,663 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, 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, 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, 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, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 02:02:08,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 02:02:08,664 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:02:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:02:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2057143053, now seen corresponding path program 1 times [2020-12-22 02:02:08,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:02:08,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213686178] [2020-12-22 02:02:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:02:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:02:09,411 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-12-22 02:02:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4531 backedges. 2493 proven. 0 refuted. 0 times theorem prover too weak. 2038 trivial. 0 not checked. [2020-12-22 02:02:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213686178] [2020-12-22 02:02:10,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:02:10,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:02:10,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724145875] [2020-12-22 02:02:10,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:02:10,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:02:10,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:02:10,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:10,503 INFO L87 Difference]: Start difference. First operand 19489 states and 19890 transitions. Second operand 3 states. [2020-12-22 02:02:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:02:14,615 INFO L93 Difference]: Finished difference Result 34482 states and 35188 transitions. [2020-12-22 02:02:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:02:14,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1673 [2020-12-22 02:02:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:02:14,622 INFO L225 Difference]: With dead ends: 34482 [2020-12-22 02:02:14,622 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 02:02:14,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:02:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 02:02:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 02:02:14,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 02:02:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 02:02:14,636 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1673 [2020-12-22 02:02:14,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:02:14,636 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 02:02:14,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:02:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 02:02:14,637 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 02:02:14,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 02:02:14,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 02:02:17,063 WARN L197 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 761 DAG size of output: 599