/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:31:25,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:31:25,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:31:25,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:31:25,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:31:25,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:31:25,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:31:25,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:31:25,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:31:25,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:31:25,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:31:25,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:31:25,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:31:25,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:31:25,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:31:25,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:31:25,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:31:25,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:31:25,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:31:25,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:31:25,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:31:25,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:31:25,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:31:25,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:31:25,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:31:25,120 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:31:25,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:31:25,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:31:25,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:31:25,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:31:25,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:31:25,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:31:25,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:31:25,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:31:25,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:31:25,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:31:25,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:31:25,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:31:25,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:31:25,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:31:25,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:31:25,156 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:31:25,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:31:25,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:31:25,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:31:25,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:31:25,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:31:25,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:31:25,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:31:25,158 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:31:25,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:31:25,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:31:25,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:31:25,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:31:25,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:31:25,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:31:25,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:31:25,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:31:25,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:31:25,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:31:25,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:31:25,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:31:25,161 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:31:25,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:31:25,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:31:25,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:31:25,622 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:31:25,623 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:31:25,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-12-22 08:31:25,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9a96602/6fe062250cda4b71b33067d44b0ae0a5/FLAGd1c0f0220 [2020-12-22 08:31:26,308 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:31:26,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-12-22 08:31:26,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9a96602/6fe062250cda4b71b33067d44b0ae0a5/FLAGd1c0f0220 [2020-12-22 08:31:26,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a9a96602/6fe062250cda4b71b33067d44b0ae0a5 [2020-12-22 08:31:26,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:31:26,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:31:26,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:31:26,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:31:26,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:31:26,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:31:26" (1/1) ... [2020-12-22 08:31:26,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3daf6af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:26, skipping insertion in model container [2020-12-22 08:31:26,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:31:26" (1/1) ... [2020-12-22 08:31:26,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:31:26,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:31:26,951 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8203,8216] [2020-12-22 08:31:27,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:31:27,093 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:31:27,245 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c[8203,8216] [2020-12-22 08:31:27,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:31:27,359 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:31:27,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27 WrapperNode [2020-12-22 08:31:27,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:31:27,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:31:27,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:31:27,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:31:27,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:31:27,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:31:27,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:31:27,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:31:27,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (1/1) ... [2020-12-22 08:31:27,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:31:27,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:31:27,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:31:27,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:31:27,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (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 08:31:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:31:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:31:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:31:27,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:31:28,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:31:28,839 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:31:28,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:31:28 BoogieIcfgContainer [2020-12-22 08:31:28,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:31:28,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:31:28,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:31:28,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:31:28,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:31:26" (1/3) ... [2020-12-22 08:31:28,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587e689c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:31:28, skipping insertion in model container [2020-12-22 08:31:28,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:31:27" (2/3) ... [2020-12-22 08:31:28,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587e689c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:31:28, skipping insertion in model container [2020-12-22 08:31:28,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:31:28" (3/3) ... [2020-12-22 08:31:28,852 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-12-22 08:31:28,859 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:31:28,865 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:31:28,886 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:31:28,917 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:31:28,917 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:31:28,917 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:31:28,917 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:31:28,918 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:31:28,918 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:31:28,918 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:31:28,918 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:31:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states. [2020-12-22 08:31:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 08:31:28,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:28,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:28,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash -981857485, now seen corresponding path program 1 times [2020-12-22 08:31:28,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:28,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755154601] [2020-12-22 08:31:28,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:29,451 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 08:31:29,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755154601] [2020-12-22 08:31:29,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:29,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:31:29,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860232496] [2020-12-22 08:31:29,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:31:29,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:31:29,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:31:29,477 INFO L87 Difference]: Start difference. First operand 216 states. Second operand 3 states. [2020-12-22 08:31:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:29,611 INFO L93 Difference]: Finished difference Result 437 states and 720 transitions. [2020-12-22 08:31:29,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:31:29,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 08:31:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:29,630 INFO L225 Difference]: With dead ends: 437 [2020-12-22 08:31:29,631 INFO L226 Difference]: Without dead ends: 329 [2020-12-22 08:31:29,635 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 08:31:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-22 08:31:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2020-12-22 08:31:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 08:31:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 489 transitions. [2020-12-22 08:31:29,716 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 489 transitions. Word has length 81 [2020-12-22 08:31:29,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:29,717 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 489 transitions. [2020-12-22 08:31:29,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:31:29,718 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 489 transitions. [2020-12-22 08:31:29,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 08:31:29,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:29,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:29,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:31:29,722 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash -651776507, now seen corresponding path program 1 times [2020-12-22 08:31:29,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:29,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363746637] [2020-12-22 08:31:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:30,154 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 08:31:30,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363746637] [2020-12-22 08:31:30,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:30,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:31:30,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152418425] [2020-12-22 08:31:30,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:31:30,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:31:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:31:30,160 INFO L87 Difference]: Start difference. First operand 327 states and 489 transitions. Second operand 7 states. [2020-12-22 08:31:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:30,581 INFO L93 Difference]: Finished difference Result 1413 states and 2181 transitions. [2020-12-22 08:31:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 08:31:30,582 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-12-22 08:31:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:30,590 INFO L225 Difference]: With dead ends: 1413 [2020-12-22 08:31:30,590 INFO L226 Difference]: Without dead ends: 1167 [2020-12-22 08:31:30,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:31:30,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2020-12-22 08:31:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1159. [2020-12-22 08:31:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1159 states. [2020-12-22 08:31:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1782 transitions. [2020-12-22 08:31:30,686 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1782 transitions. Word has length 82 [2020-12-22 08:31:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:30,686 INFO L481 AbstractCegarLoop]: Abstraction has 1159 states and 1782 transitions. [2020-12-22 08:31:30,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:31:30,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1782 transitions. [2020-12-22 08:31:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:31:30,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:30,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:30,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:31:30,693 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash 994859382, now seen corresponding path program 1 times [2020-12-22 08:31:30,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:30,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597161189] [2020-12-22 08:31:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:30,827 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 08:31:30,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597161189] [2020-12-22 08:31:30,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:30,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:31:30,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747767913] [2020-12-22 08:31:30,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:31:30,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:30,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:31:30,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:31:30,835 INFO L87 Difference]: Start difference. First operand 1159 states and 1782 transitions. Second operand 6 states. [2020-12-22 08:31:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:31,483 INFO L93 Difference]: Finished difference Result 3912 states and 6097 transitions. [2020-12-22 08:31:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:31:31,483 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 08:31:31,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:31,499 INFO L225 Difference]: With dead ends: 3912 [2020-12-22 08:31:31,500 INFO L226 Difference]: Without dead ends: 2796 [2020-12-22 08:31:31,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:31:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2796 states. [2020-12-22 08:31:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2796 to 2792. [2020-12-22 08:31:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2792 states. [2020-12-22 08:31:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4340 transitions. [2020-12-22 08:31:31,702 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4340 transitions. Word has length 83 [2020-12-22 08:31:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:31,710 INFO L481 AbstractCegarLoop]: Abstraction has 2792 states and 4340 transitions. [2020-12-22 08:31:31,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:31:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4340 transitions. [2020-12-22 08:31:31,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:31:31,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:31,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:31,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:31:31,716 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1568078791, now seen corresponding path program 1 times [2020-12-22 08:31:31,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:31,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570996946] [2020-12-22 08:31:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:31,901 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 08:31:31,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570996946] [2020-12-22 08:31:31,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:31,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:31:31,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42232849] [2020-12-22 08:31:31,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:31:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:31:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:31:31,907 INFO L87 Difference]: Start difference. First operand 2792 states and 4340 transitions. Second operand 5 states. [2020-12-22 08:31:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:32,606 INFO L93 Difference]: Finished difference Result 7918 states and 12370 transitions. [2020-12-22 08:31:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:31:32,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 08:31:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:32,634 INFO L225 Difference]: With dead ends: 7918 [2020-12-22 08:31:32,635 INFO L226 Difference]: Without dead ends: 5185 [2020-12-22 08:31:32,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:31:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2020-12-22 08:31:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 5183. [2020-12-22 08:31:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5183 states. [2020-12-22 08:31:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 8048 transitions. [2020-12-22 08:31:33,037 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 8048 transitions. Word has length 83 [2020-12-22 08:31:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:33,040 INFO L481 AbstractCegarLoop]: Abstraction has 5183 states and 8048 transitions. [2020-12-22 08:31:33,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:31:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 8048 transitions. [2020-12-22 08:31:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:31:33,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:33,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:33,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:31:33,050 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2053901352, now seen corresponding path program 1 times [2020-12-22 08:31:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:33,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547244113] [2020-12-22 08:31:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:31:33,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547244113] [2020-12-22 08:31:33,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:33,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:31:33,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539477178] [2020-12-22 08:31:33,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:31:33,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:31:33,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:31:33,168 INFO L87 Difference]: Start difference. First operand 5183 states and 8048 transitions. Second operand 6 states. [2020-12-22 08:31:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:34,452 INFO L93 Difference]: Finished difference Result 19106 states and 29710 transitions. [2020-12-22 08:31:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:31:34,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 08:31:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:34,526 INFO L225 Difference]: With dead ends: 19106 [2020-12-22 08:31:34,526 INFO L226 Difference]: Without dead ends: 14005 [2020-12-22 08:31:34,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:31:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14005 states. [2020-12-22 08:31:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14005 to 14001. [2020-12-22 08:31:35,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14001 states. [2020-12-22 08:31:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14001 states to 14001 states and 21674 transitions. [2020-12-22 08:31:35,704 INFO L78 Accepts]: Start accepts. Automaton has 14001 states and 21674 transitions. Word has length 83 [2020-12-22 08:31:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:35,705 INFO L481 AbstractCegarLoop]: Abstraction has 14001 states and 21674 transitions. [2020-12-22 08:31:35,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:31:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 14001 states and 21674 transitions. [2020-12-22 08:31:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:31:35,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:35,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:35,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:31:35,716 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1112064425, now seen corresponding path program 1 times [2020-12-22 08:31:35,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:35,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455290582] [2020-12-22 08:31:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:35,845 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 08:31:35,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455290582] [2020-12-22 08:31:35,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:35,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:31:35,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157321936] [2020-12-22 08:31:35,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:31:35,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:35,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:31:35,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:31:35,849 INFO L87 Difference]: Start difference. First operand 14001 states and 21674 transitions. Second operand 5 states. [2020-12-22 08:31:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:38,060 INFO L93 Difference]: Finished difference Result 40746 states and 63120 transitions. [2020-12-22 08:31:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:31:38,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 08:31:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:38,148 INFO L225 Difference]: With dead ends: 40746 [2020-12-22 08:31:38,148 INFO L226 Difference]: Without dead ends: 26857 [2020-12-22 08:31:38,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:31:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26857 states. [2020-12-22 08:31:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26857 to 26855. [2020-12-22 08:31:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26855 states. [2020-12-22 08:31:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26855 states to 26855 states and 41373 transitions. [2020-12-22 08:31:39,937 INFO L78 Accepts]: Start accepts. Automaton has 26855 states and 41373 transitions. Word has length 83 [2020-12-22 08:31:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:39,938 INFO L481 AbstractCegarLoop]: Abstraction has 26855 states and 41373 transitions. [2020-12-22 08:31:39,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:31:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 26855 states and 41373 transitions. [2020-12-22 08:31:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 08:31:39,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:39,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:39,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:31:39,948 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:39,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:39,949 INFO L82 PathProgramCache]: Analyzing trace with hash 340452666, now seen corresponding path program 1 times [2020-12-22 08:31:39,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:39,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685449225] [2020-12-22 08:31:39,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:40,034 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 08:31:40,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685449225] [2020-12-22 08:31:40,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:40,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:31:40,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938100399] [2020-12-22 08:31:40,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:31:40,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:40,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:31:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:31:40,039 INFO L87 Difference]: Start difference. First operand 26855 states and 41373 transitions. Second operand 5 states. [2020-12-22 08:31:43,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:43,217 INFO L93 Difference]: Finished difference Result 79118 states and 122024 transitions. [2020-12-22 08:31:43,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:31:43,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 08:31:43,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:43,385 INFO L225 Difference]: With dead ends: 79118 [2020-12-22 08:31:43,385 INFO L226 Difference]: Without dead ends: 52409 [2020-12-22 08:31:43,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:31:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52409 states. [2020-12-22 08:31:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52409 to 52407. [2020-12-22 08:31:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52407 states. [2020-12-22 08:31:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52407 states to 52407 states and 80488 transitions. [2020-12-22 08:31:46,856 INFO L78 Accepts]: Start accepts. Automaton has 52407 states and 80488 transitions. Word has length 83 [2020-12-22 08:31:46,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:46,864 INFO L481 AbstractCegarLoop]: Abstraction has 52407 states and 80488 transitions. [2020-12-22 08:31:46,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:31:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 52407 states and 80488 transitions. [2020-12-22 08:31:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 08:31:46,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:46,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:46,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:31:46,885 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash 31378129, now seen corresponding path program 1 times [2020-12-22 08:31:46,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:46,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475613712] [2020-12-22 08:31:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:46,997 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 08:31:46,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475613712] [2020-12-22 08:31:46,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:46,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:31:46,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504881517] [2020-12-22 08:31:46,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:31:46,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:31:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:31:47,000 INFO L87 Difference]: Start difference. First operand 52407 states and 80488 transitions. Second operand 5 states. [2020-12-22 08:31:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:31:51,452 INFO L93 Difference]: Finished difference Result 99073 states and 151457 transitions. [2020-12-22 08:31:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:31:51,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-12-22 08:31:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:31:51,902 INFO L225 Difference]: With dead ends: 99073 [2020-12-22 08:31:51,903 INFO L226 Difference]: Without dead ends: 99071 [2020-12-22 08:31:51,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:31:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99071 states. [2020-12-22 08:31:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99071 to 53079. [2020-12-22 08:31:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53079 states. [2020-12-22 08:31:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53079 states to 53079 states and 81160 transitions. [2020-12-22 08:31:55,647 INFO L78 Accepts]: Start accepts. Automaton has 53079 states and 81160 transitions. Word has length 84 [2020-12-22 08:31:55,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:31:55,648 INFO L481 AbstractCegarLoop]: Abstraction has 53079 states and 81160 transitions. [2020-12-22 08:31:55,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:31:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 53079 states and 81160 transitions. [2020-12-22 08:31:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 08:31:55,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:31:55,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:31:55,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:31:55,661 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:31:55,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:31:55,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1251175856, now seen corresponding path program 1 times [2020-12-22 08:31:55,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:31:55,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189423338] [2020-12-22 08:31:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:31:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:31:55,952 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 08:31:55,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189423338] [2020-12-22 08:31:55,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:31:55,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:31:55,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144450786] [2020-12-22 08:31:55,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:31:55,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:31:55,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:31:55,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:31:55,954 INFO L87 Difference]: Start difference. First operand 53079 states and 81160 transitions. Second operand 10 states. [2020-12-22 08:32:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:17,344 INFO L93 Difference]: Finished difference Result 359465 states and 548898 transitions. [2020-12-22 08:32:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 08:32:17,344 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2020-12-22 08:32:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:18,142 INFO L225 Difference]: With dead ends: 359465 [2020-12-22 08:32:18,143 INFO L226 Difference]: Without dead ends: 307225 [2020-12-22 08:32:18,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 08:32:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307225 states. [2020-12-22 08:32:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307225 to 53173. [2020-12-22 08:32:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53173 states. [2020-12-22 08:32:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53173 states to 53173 states and 81261 transitions. [2020-12-22 08:32:24,883 INFO L78 Accepts]: Start accepts. Automaton has 53173 states and 81261 transitions. Word has length 85 [2020-12-22 08:32:24,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:24,884 INFO L481 AbstractCegarLoop]: Abstraction has 53173 states and 81261 transitions. [2020-12-22 08:32:24,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:32:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 53173 states and 81261 transitions. [2020-12-22 08:32:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 08:32:24,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:24,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:32:24,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:32:24,898 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:24,898 INFO L82 PathProgramCache]: Analyzing trace with hash 192213392, now seen corresponding path program 1 times [2020-12-22 08:32:24,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:24,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103674395] [2020-12-22 08:32:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:25,159 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 08:32:25,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103674395] [2020-12-22 08:32:25,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:25,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:32:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459459910] [2020-12-22 08:32:25,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:32:25,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:25,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:32:25,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:32:25,162 INFO L87 Difference]: Start difference. First operand 53173 states and 81261 transitions. Second operand 10 states. [2020-12-22 08:32:47,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:32:47,665 INFO L93 Difference]: Finished difference Result 262625 states and 397668 transitions. [2020-12-22 08:32:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 08:32:47,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2020-12-22 08:32:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:32:48,232 INFO L225 Difference]: With dead ends: 262625 [2020-12-22 08:32:48,232 INFO L226 Difference]: Without dead ends: 221957 [2020-12-22 08:32:48,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2020-12-22 08:32:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221957 states. [2020-12-22 08:32:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221957 to 53521. [2020-12-22 08:32:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53521 states. [2020-12-22 08:32:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53521 states to 53521 states and 81702 transitions. [2020-12-22 08:32:55,257 INFO L78 Accepts]: Start accepts. Automaton has 53521 states and 81702 transitions. Word has length 85 [2020-12-22 08:32:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:32:55,257 INFO L481 AbstractCegarLoop]: Abstraction has 53521 states and 81702 transitions. [2020-12-22 08:32:55,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:32:55,257 INFO L276 IsEmpty]: Start isEmpty. Operand 53521 states and 81702 transitions. [2020-12-22 08:32:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 08:32:55,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:32:55,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:32:55,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:32:55,269 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:32:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:32:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash -415777424, now seen corresponding path program 1 times [2020-12-22 08:32:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:32:55,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489537864] [2020-12-22 08:32:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:32:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:32:55,508 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 08:32:55,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489537864] [2020-12-22 08:32:55,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:32:55,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:32:55,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209341490] [2020-12-22 08:32:55,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:32:55,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:32:55,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:32:55,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:32:55,510 INFO L87 Difference]: Start difference. First operand 53521 states and 81702 transitions. Second operand 10 states. [2020-12-22 08:33:39,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:33:39,667 INFO L93 Difference]: Finished difference Result 415556 states and 634946 transitions. [2020-12-22 08:33:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 08:33:39,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2020-12-22 08:33:39,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:33:40,359 INFO L225 Difference]: With dead ends: 415556 [2020-12-22 08:33:40,360 INFO L226 Difference]: Without dead ends: 383772 [2020-12-22 08:33:40,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 08:33:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383772 states. [2020-12-22 08:33:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383772 to 54274. [2020-12-22 08:33:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54274 states. [2020-12-22 08:33:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54274 states to 54274 states and 82664 transitions. [2020-12-22 08:33:49,899 INFO L78 Accepts]: Start accepts. Automaton has 54274 states and 82664 transitions. Word has length 85 [2020-12-22 08:33:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:33:49,899 INFO L481 AbstractCegarLoop]: Abstraction has 54274 states and 82664 transitions. [2020-12-22 08:33:49,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:33:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 54274 states and 82664 transitions. [2020-12-22 08:33:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 08:33:49,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:33:49,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:33:49,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:33:49,912 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:33:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:33:49,912 INFO L82 PathProgramCache]: Analyzing trace with hash -777268912, now seen corresponding path program 1 times [2020-12-22 08:33:49,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:33:49,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083399365] [2020-12-22 08:33:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:33:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:33:50,187 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 08:33:50,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083399365] [2020-12-22 08:33:50,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:33:50,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:33:50,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704628700] [2020-12-22 08:33:50,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:33:50,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:33:50,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:33:50,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:33:50,189 INFO L87 Difference]: Start difference. First operand 54274 states and 82664 transitions. Second operand 10 states. [2020-12-22 08:34:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:34:15,509 INFO L93 Difference]: Finished difference Result 179710 states and 270832 transitions. [2020-12-22 08:34:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:34:15,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2020-12-22 08:34:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:34:15,732 INFO L225 Difference]: With dead ends: 179710 [2020-12-22 08:34:15,732 INFO L226 Difference]: Without dead ends: 161276 [2020-12-22 08:34:15,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2020-12-22 08:34:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161276 states. [2020-12-22 08:34:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161276 to 55522. [2020-12-22 08:34:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55522 states. [2020-12-22 08:34:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55522 states to 55522 states and 84398 transitions. [2020-12-22 08:34:24,430 INFO L78 Accepts]: Start accepts. Automaton has 55522 states and 84398 transitions. Word has length 85 [2020-12-22 08:34:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:34:24,431 INFO L481 AbstractCegarLoop]: Abstraction has 55522 states and 84398 transitions. [2020-12-22 08:34:24,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:34:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 55522 states and 84398 transitions. [2020-12-22 08:34:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 08:34:24,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:34:24,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:34:24,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:34:24,442 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:34:24,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:34:24,443 INFO L82 PathProgramCache]: Analyzing trace with hash -56546000, now seen corresponding path program 1 times [2020-12-22 08:34:24,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:34:24,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443887054] [2020-12-22 08:34:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:34:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:34:24,663 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 08:34:24,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443887054] [2020-12-22 08:34:24,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:34:24,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:34:24,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045836962] [2020-12-22 08:34:24,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:34:24,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:34:24,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:34:24,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:34:24,667 INFO L87 Difference]: Start difference. First operand 55522 states and 84398 transitions. Second operand 10 states. [2020-12-22 08:35:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:35:07,976 INFO L93 Difference]: Finished difference Result 286795 states and 435305 transitions. [2020-12-22 08:35:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 08:35:07,977 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 85 [2020-12-22 08:35:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:35:08,486 INFO L225 Difference]: With dead ends: 286795 [2020-12-22 08:35:08,486 INFO L226 Difference]: Without dead ends: 280035 [2020-12-22 08:35:08,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=694, Unknown=0, NotChecked=0, Total=930 [2020-12-22 08:35:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280035 states. [2020-12-22 08:35:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280035 to 55522. [2020-12-22 08:35:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55522 states. [2020-12-22 08:35:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55522 states to 55522 states and 84382 transitions. [2020-12-22 08:35:19,052 INFO L78 Accepts]: Start accepts. Automaton has 55522 states and 84382 transitions. Word has length 85 [2020-12-22 08:35:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:35:19,052 INFO L481 AbstractCegarLoop]: Abstraction has 55522 states and 84382 transitions. [2020-12-22 08:35:19,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:35:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 55522 states and 84382 transitions. [2020-12-22 08:35:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 08:35:19,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:35:19,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:35:19,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:35:19,063 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:35:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:35:19,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1761654198, now seen corresponding path program 1 times [2020-12-22 08:35:19,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:35:19,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66938525] [2020-12-22 08:35:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:35:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:35:19,184 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 08:35:19,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66938525] [2020-12-22 08:35:19,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:35:19,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:35:19,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891771097] [2020-12-22 08:35:19,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:35:19,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:35:19,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:35:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:35:19,186 INFO L87 Difference]: Start difference. First operand 55522 states and 84382 transitions. Second operand 4 states.