/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/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:36:25,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:36:25,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:36:25,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:36:25,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:36:25,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:36:25,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:36:25,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:36:25,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:36:25,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:36:25,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:36:25,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:36:25,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:36:25,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:36:25,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:36:25,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:36:25,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:36:25,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:36:25,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:36:25,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:36:25,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:36:25,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:36:25,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:36:25,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:36:25,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 07:36:25,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 07:36:25,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 07:36:25,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 07:36:25,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 07:36:25,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 07:36:25,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:36:25,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:36:25,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:36:25,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:36:25,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:36:25,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:36:25,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:36:25,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:36:25,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:36:25,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:36:25,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:36:25,907 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:36:25,956 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:36:25,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:36:25,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:36:25,958 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:36:25,959 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:36:25,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:36:25,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:36:25,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:36:25,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:36:25,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:36:25,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:36:25,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:36:25,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:36:25,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:36:25,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:36:25,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:36:25,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:36:25,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:36:25,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:36:25,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:36:25,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:36:25,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:36:25,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:36:25,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:36:25,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:36:25,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:36:26,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:36:26,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:36:26,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:36:26,363 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:36:26,364 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:36:26,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:36:26,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f5cafc8/9f2ec698abb54cfca17795a00044097e/FLAGfae5a8c05 [2020-12-22 07:36:27,169 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:36:27,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:36:27,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f5cafc8/9f2ec698abb54cfca17795a00044097e/FLAGfae5a8c05 [2020-12-22 07:36:27,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55f5cafc8/9f2ec698abb54cfca17795a00044097e [2020-12-22 07:36:27,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:36:27,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:36:27,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:36:27,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:36:27,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:36:27,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:36:27" (1/1) ... [2020-12-22 07:36:27,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bca1d66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:27, skipping insertion in model container [2020-12-22 07:36:27,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:36:27" (1/1) ... [2020-12-22 07:36:27,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:36:27,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:36:27,885 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/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c[15177,15190] [2020-12-22 07:36:27,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:36:27,911 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:36:28,048 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/pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c[15177,15190] [2020-12-22 07:36:28,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:36:28,092 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:36:28,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28 WrapperNode [2020-12-22 07:36:28,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:36:28,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:36:28,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:36:28,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:36:28,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:36:28,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:36:28,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:36:28,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:36:28,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (1/1) ... [2020-12-22 07:36:28,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:36:28,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:36:28,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:36:28,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:36:28,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (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 07:36:28,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:36:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:36:28,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:36:28,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:36:29,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:36:29,172 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 07:36:29,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:36:29 BoogieIcfgContainer [2020-12-22 07:36:29,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:36:29,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:36:29,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:36:29,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:36:29,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:36:27" (1/3) ... [2020-12-22 07:36:29,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1090ede0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:36:29, skipping insertion in model container [2020-12-22 07:36:29,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:36:28" (2/3) ... [2020-12-22 07:36:29,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1090ede0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:36:29, skipping insertion in model container [2020-12-22 07:36:29,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:36:29" (3/3) ... [2020-12-22 07:36:29,184 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:36:29,191 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:36:29,196 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:36:29,214 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:36:29,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:36:29,244 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:36:29,244 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:36:29,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:36:29,244 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:36:29,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:36:29,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:36:29,245 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:36:29,264 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-12-22 07:36:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:36:29,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:29,274 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] [2020-12-22 07:36:29,274 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:29,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:29,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1259035486, now seen corresponding path program 1 times [2020-12-22 07:36:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:29,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055422910] [2020-12-22 07:36:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:29,530 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 07:36:29,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055422910] [2020-12-22 07:36:29,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:29,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:36:29,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004646317] [2020-12-22 07:36:29,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:36:29,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:29,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:36:29,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:36:29,559 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 2 states. [2020-12-22 07:36:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:29,593 INFO L93 Difference]: Finished difference Result 169 states and 285 transitions. [2020-12-22 07:36:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:36:29,595 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:36:29,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:29,608 INFO L225 Difference]: With dead ends: 169 [2020-12-22 07:36:29,609 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 07:36:29,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:36:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 07:36:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-12-22 07:36:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 07:36:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 180 transitions. [2020-12-22 07:36:29,666 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 180 transitions. Word has length 37 [2020-12-22 07:36:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:29,667 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 180 transitions. [2020-12-22 07:36:29,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:36:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 180 transitions. [2020-12-22 07:36:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:36:29,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:29,670 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] [2020-12-22 07:36:29,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:36:29,670 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1533795100, now seen corresponding path program 1 times [2020-12-22 07:36:29,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:29,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518034431] [2020-12-22 07:36:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:29,816 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 07:36:29,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518034431] [2020-12-22 07:36:29,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:29,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:36:29,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667657550] [2020-12-22 07:36:29,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:36:29,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:29,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:36:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:36:29,821 INFO L87 Difference]: Start difference. First operand 105 states and 180 transitions. Second operand 5 states. [2020-12-22 07:36:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:29,963 INFO L93 Difference]: Finished difference Result 168 states and 278 transitions. [2020-12-22 07:36:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:36:29,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:36:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:29,966 INFO L225 Difference]: With dead ends: 168 [2020-12-22 07:36:29,966 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 07:36:29,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:36:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 07:36:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-12-22 07:36:30,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 07:36:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 140 transitions. [2020-12-22 07:36:30,011 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 140 transitions. Word has length 37 [2020-12-22 07:36:30,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:30,012 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 140 transitions. [2020-12-22 07:36:30,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:36:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 140 transitions. [2020-12-22 07:36:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:30,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:30,018 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] [2020-12-22 07:36:30,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:36:30,019 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:30,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:30,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1950823117, now seen corresponding path program 1 times [2020-12-22 07:36:30,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:30,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376164960] [2020-12-22 07:36:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:30,199 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 07:36:30,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376164960] [2020-12-22 07:36:30,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:30,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:30,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031007634] [2020-12-22 07:36:30,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:30,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:30,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:30,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:30,203 INFO L87 Difference]: Start difference. First operand 105 states and 140 transitions. Second operand 3 states. [2020-12-22 07:36:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:30,258 INFO L93 Difference]: Finished difference Result 217 states and 318 transitions. [2020-12-22 07:36:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:30,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:30,269 INFO L225 Difference]: With dead ends: 217 [2020-12-22 07:36:30,269 INFO L226 Difference]: Without dead ends: 158 [2020-12-22 07:36:30,270 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 07:36:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-22 07:36:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2020-12-22 07:36:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-22 07:36:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 222 transitions. [2020-12-22 07:36:30,301 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 222 transitions. Word has length 76 [2020-12-22 07:36:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:30,301 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 222 transitions. [2020-12-22 07:36:30,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 222 transitions. [2020-12-22 07:36:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:30,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:30,308 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] [2020-12-22 07:36:30,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:36:30,308 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:30,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:30,310 INFO L82 PathProgramCache]: Analyzing trace with hash 699917825, now seen corresponding path program 1 times [2020-12-22 07:36:30,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:30,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268046881] [2020-12-22 07:36:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:30,456 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 07:36:30,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268046881] [2020-12-22 07:36:30,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:30,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:30,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300742924] [2020-12-22 07:36:30,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:30,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:30,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:30,463 INFO L87 Difference]: Start difference. First operand 156 states and 222 transitions. Second operand 3 states. [2020-12-22 07:36:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:30,504 INFO L93 Difference]: Finished difference Result 364 states and 554 transitions. [2020-12-22 07:36:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:30,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:30,508 INFO L225 Difference]: With dead ends: 364 [2020-12-22 07:36:30,508 INFO L226 Difference]: Without dead ends: 254 [2020-12-22 07:36:30,509 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 07:36:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-22 07:36:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 252. [2020-12-22 07:36:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-22 07:36:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 375 transitions. [2020-12-22 07:36:30,531 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 375 transitions. Word has length 76 [2020-12-22 07:36:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:30,532 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 375 transitions. [2020-12-22 07:36:30,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 375 transitions. [2020-12-22 07:36:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:30,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:30,535 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] [2020-12-22 07:36:30,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:36:30,535 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -45664905, now seen corresponding path program 1 times [2020-12-22 07:36:30,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:30,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097732657] [2020-12-22 07:36:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:30,639 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 07:36:30,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097732657] [2020-12-22 07:36:30,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:30,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:30,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844923139] [2020-12-22 07:36:30,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:30,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:30,645 INFO L87 Difference]: Start difference. First operand 252 states and 375 transitions. Second operand 3 states. [2020-12-22 07:36:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:30,698 INFO L93 Difference]: Finished difference Result 640 states and 993 transitions. [2020-12-22 07:36:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:30,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:30,702 INFO L225 Difference]: With dead ends: 640 [2020-12-22 07:36:30,702 INFO L226 Difference]: Without dead ends: 434 [2020-12-22 07:36:30,703 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 07:36:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-12-22 07:36:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2020-12-22 07:36:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-12-22 07:36:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 659 transitions. [2020-12-22 07:36:30,732 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 659 transitions. Word has length 76 [2020-12-22 07:36:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:30,733 INFO L481 AbstractCegarLoop]: Abstraction has 432 states and 659 transitions. [2020-12-22 07:36:30,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 659 transitions. [2020-12-22 07:36:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:30,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:30,735 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] [2020-12-22 07:36:30,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:36:30,735 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:30,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1985695763, now seen corresponding path program 1 times [2020-12-22 07:36:30,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:30,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604738379] [2020-12-22 07:36:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:30,848 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 07:36:30,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604738379] [2020-12-22 07:36:30,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:30,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:30,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525457507] [2020-12-22 07:36:30,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:30,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:30,851 INFO L87 Difference]: Start difference. First operand 432 states and 659 transitions. Second operand 3 states. [2020-12-22 07:36:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:30,902 INFO L93 Difference]: Finished difference Result 1156 states and 1805 transitions. [2020-12-22 07:36:30,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:30,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:36:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:30,908 INFO L225 Difference]: With dead ends: 1156 [2020-12-22 07:36:30,908 INFO L226 Difference]: Without dead ends: 770 [2020-12-22 07:36:30,910 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 07:36:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-12-22 07:36:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 768. [2020-12-22 07:36:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 768 states. [2020-12-22 07:36:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1183 transitions. [2020-12-22 07:36:30,950 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1183 transitions. Word has length 76 [2020-12-22 07:36:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:30,951 INFO L481 AbstractCegarLoop]: Abstraction has 768 states and 1183 transitions. [2020-12-22 07:36:30,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1183 transitions. [2020-12-22 07:36:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:30,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:30,952 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] [2020-12-22 07:36:30,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:36:30,953 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:30,954 INFO L82 PathProgramCache]: Analyzing trace with hash 714986851, now seen corresponding path program 1 times [2020-12-22 07:36:30,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:30,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635862592] [2020-12-22 07:36:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:31,079 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 07:36:31,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635862592] [2020-12-22 07:36:31,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:31,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:36:31,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182970242] [2020-12-22 07:36:31,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:36:31,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:31,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:36:31,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:36:31,082 INFO L87 Difference]: Start difference. First operand 768 states and 1183 transitions. Second operand 7 states. [2020-12-22 07:36:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:31,371 INFO L93 Difference]: Finished difference Result 2212 states and 3457 transitions. [2020-12-22 07:36:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:36:31,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-22 07:36:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:31,397 INFO L225 Difference]: With dead ends: 2212 [2020-12-22 07:36:31,397 INFO L226 Difference]: Without dead ends: 1490 [2020-12-22 07:36:31,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:36:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2020-12-22 07:36:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1488. [2020-12-22 07:36:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1488 states. [2020-12-22 07:36:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2311 transitions. [2020-12-22 07:36:31,474 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2311 transitions. Word has length 76 [2020-12-22 07:36:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:31,475 INFO L481 AbstractCegarLoop]: Abstraction has 1488 states and 2311 transitions. [2020-12-22 07:36:31,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:36:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2311 transitions. [2020-12-22 07:36:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:36:31,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:31,476 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] [2020-12-22 07:36:31,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:36:31,477 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1224459941, now seen corresponding path program 1 times [2020-12-22 07:36:31,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:31,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978175041] [2020-12-22 07:36:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:31,673 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 07:36:31,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978175041] [2020-12-22 07:36:31,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:31,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:31,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233305065] [2020-12-22 07:36:31,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:31,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:31,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:31,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:31,678 INFO L87 Difference]: Start difference. First operand 1488 states and 2311 transitions. Second operand 8 states. [2020-12-22 07:36:32,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:32,982 INFO L93 Difference]: Finished difference Result 18792 states and 29491 transitions. [2020-12-22 07:36:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:36:32,983 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 76 [2020-12-22 07:36:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:33,072 INFO L225 Difference]: With dead ends: 18792 [2020-12-22 07:36:33,072 INFO L226 Difference]: Without dead ends: 17350 [2020-12-22 07:36:33,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:36:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17350 states. [2020-12-22 07:36:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17350 to 2928. [2020-12-22 07:36:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2928 states. [2020-12-22 07:36:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 4511 transitions. [2020-12-22 07:36:33,472 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 4511 transitions. Word has length 76 [2020-12-22 07:36:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:33,472 INFO L481 AbstractCegarLoop]: Abstraction has 2928 states and 4511 transitions. [2020-12-22 07:36:33,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 4511 transitions. [2020-12-22 07:36:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:36:33,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:33,475 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] [2020-12-22 07:36:33,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:36:33,476 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1530728779, now seen corresponding path program 1 times [2020-12-22 07:36:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:33,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769599272] [2020-12-22 07:36:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:33,628 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 07:36:33,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769599272] [2020-12-22 07:36:33,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:33,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:33,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343535523] [2020-12-22 07:36:33,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:33,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:33,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:33,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:33,638 INFO L87 Difference]: Start difference. First operand 2928 states and 4511 transitions. Second operand 3 states. [2020-12-22 07:36:33,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:33,865 INFO L93 Difference]: Finished difference Result 6494 states and 10019 transitions. [2020-12-22 07:36:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:33,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:36:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:33,886 INFO L225 Difference]: With dead ends: 6494 [2020-12-22 07:36:33,886 INFO L226 Difference]: Without dead ends: 3612 [2020-12-22 07:36:33,892 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 07:36:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2020-12-22 07:36:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 3610. [2020-12-22 07:36:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3610 states. [2020-12-22 07:36:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5529 transitions. [2020-12-22 07:36:34,170 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5529 transitions. Word has length 78 [2020-12-22 07:36:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:34,171 INFO L481 AbstractCegarLoop]: Abstraction has 3610 states and 5529 transitions. [2020-12-22 07:36:34,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5529 transitions. [2020-12-22 07:36:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:36:34,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:34,172 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] [2020-12-22 07:36:34,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:36:34,172 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:34,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1464235267, now seen corresponding path program 1 times [2020-12-22 07:36:34,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:34,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370484493] [2020-12-22 07:36:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:34,486 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 07:36:34,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370484493] [2020-12-22 07:36:34,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:34,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:34,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010923656] [2020-12-22 07:36:34,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:34,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:34,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:34,489 INFO L87 Difference]: Start difference. First operand 3610 states and 5529 transitions. Second operand 8 states. [2020-12-22 07:36:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:35,326 INFO L93 Difference]: Finished difference Result 8952 states and 13784 transitions. [2020-12-22 07:36:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:35,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-12-22 07:36:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:35,343 INFO L225 Difference]: With dead ends: 8952 [2020-12-22 07:36:35,343 INFO L226 Difference]: Without dead ends: 5390 [2020-12-22 07:36:35,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:36:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-12-22 07:36:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 3610. [2020-12-22 07:36:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3610 states. [2020-12-22 07:36:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5489 transitions. [2020-12-22 07:36:35,680 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5489 transitions. Word has length 78 [2020-12-22 07:36:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:35,681 INFO L481 AbstractCegarLoop]: Abstraction has 3610 states and 5489 transitions. [2020-12-22 07:36:35,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5489 transitions. [2020-12-22 07:36:35,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:36:35,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:35,682 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] [2020-12-22 07:36:35,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:36:35,682 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash 324678809, now seen corresponding path program 1 times [2020-12-22 07:36:35,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:35,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341900400] [2020-12-22 07:36:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:35,762 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 07:36:35,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341900400] [2020-12-22 07:36:35,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:35,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:35,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715221925] [2020-12-22 07:36:35,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:35,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:35,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:35,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:35,769 INFO L87 Difference]: Start difference. First operand 3610 states and 5489 transitions. Second operand 3 states. [2020-12-22 07:36:36,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:36,264 INFO L93 Difference]: Finished difference Result 10254 states and 15571 transitions. [2020-12-22 07:36:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:36,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:36:36,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:36,279 INFO L225 Difference]: With dead ends: 10254 [2020-12-22 07:36:36,279 INFO L226 Difference]: Without dead ends: 6692 [2020-12-22 07:36:36,285 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 07:36:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6692 states. [2020-12-22 07:36:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6692 to 6690. [2020-12-22 07:36:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6690 states. [2020-12-22 07:36:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6690 states to 6690 states and 10049 transitions. [2020-12-22 07:36:36,886 INFO L78 Accepts]: Start accepts. Automaton has 6690 states and 10049 transitions. Word has length 78 [2020-12-22 07:36:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:36,886 INFO L481 AbstractCegarLoop]: Abstraction has 6690 states and 10049 transitions. [2020-12-22 07:36:36,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 6690 states and 10049 transitions. [2020-12-22 07:36:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:36:36,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:36,888 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] [2020-12-22 07:36:36,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:36:36,888 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1572186425, now seen corresponding path program 1 times [2020-12-22 07:36:36,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:36,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643547880] [2020-12-22 07:36:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:36,944 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 07:36:36,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643547880] [2020-12-22 07:36:36,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:36,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:36:36,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007458681] [2020-12-22 07:36:36,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:36:36,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:36,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:36:36,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:36:36,947 INFO L87 Difference]: Start difference. First operand 6690 states and 10049 transitions. Second operand 3 states. [2020-12-22 07:36:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:37,928 INFO L93 Difference]: Finished difference Result 19014 states and 28451 transitions. [2020-12-22 07:36:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:36:37,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:36:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:37,954 INFO L225 Difference]: With dead ends: 19014 [2020-12-22 07:36:37,955 INFO L226 Difference]: Without dead ends: 12372 [2020-12-22 07:36:37,965 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 07:36:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12372 states. [2020-12-22 07:36:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12372 to 12370. [2020-12-22 07:36:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12370 states. [2020-12-22 07:36:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12370 states to 12370 states and 18289 transitions. [2020-12-22 07:36:38,976 INFO L78 Accepts]: Start accepts. Automaton has 12370 states and 18289 transitions. Word has length 78 [2020-12-22 07:36:38,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:38,976 INFO L481 AbstractCegarLoop]: Abstraction has 12370 states and 18289 transitions. [2020-12-22 07:36:38,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:36:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 12370 states and 18289 transitions. [2020-12-22 07:36:38,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:36:38,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:38,977 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] [2020-12-22 07:36:38,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:36:38,978 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1438624019, now seen corresponding path program 1 times [2020-12-22 07:36:38,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:38,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129058887] [2020-12-22 07:36:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:39,086 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 07:36:39,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129058887] [2020-12-22 07:36:39,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:39,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:39,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543033639] [2020-12-22 07:36:39,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:39,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:39,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:39,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:39,089 INFO L87 Difference]: Start difference. First operand 12370 states and 18289 transitions. Second operand 8 states. [2020-12-22 07:36:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:40,983 INFO L93 Difference]: Finished difference Result 24209 states and 35367 transitions. [2020-12-22 07:36:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:36:40,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 07:36:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:41,034 INFO L225 Difference]: With dead ends: 24209 [2020-12-22 07:36:41,034 INFO L226 Difference]: Without dead ends: 24207 [2020-12-22 07:36:41,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:36:41,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24207 states. [2020-12-22 07:36:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24207 to 13138. [2020-12-22 07:36:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13138 states. [2020-12-22 07:36:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13138 states to 13138 states and 19025 transitions. [2020-12-22 07:36:42,135 INFO L78 Accepts]: Start accepts. Automaton has 13138 states and 19025 transitions. Word has length 79 [2020-12-22 07:36:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:42,135 INFO L481 AbstractCegarLoop]: Abstraction has 13138 states and 19025 transitions. [2020-12-22 07:36:42,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 13138 states and 19025 transitions. [2020-12-22 07:36:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:42,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:42,145 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:36:42,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:36:42,145 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:42,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1738800096, now seen corresponding path program 1 times [2020-12-22 07:36:42,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:42,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224195474] [2020-12-22 07:36:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 07:36:42,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224195474] [2020-12-22 07:36:42,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:42,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:42,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429144997] [2020-12-22 07:36:42,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:42,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:42,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:42,315 INFO L87 Difference]: Start difference. First operand 13138 states and 19025 transitions. Second operand 8 states. [2020-12-22 07:36:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:47,941 INFO L93 Difference]: Finished difference Result 95904 states and 138856 transitions. [2020-12-22 07:36:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:47,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:48,133 INFO L225 Difference]: With dead ends: 95904 [2020-12-22 07:36:48,133 INFO L226 Difference]: Without dead ends: 82814 [2020-12-22 07:36:48,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82814 states. [2020-12-22 07:36:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82814 to 26226. [2020-12-22 07:36:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26226 states. [2020-12-22 07:36:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26226 states to 26226 states and 37841 transitions. [2020-12-22 07:36:51,259 INFO L78 Accepts]: Start accepts. Automaton has 26226 states and 37841 transitions. Word has length 110 [2020-12-22 07:36:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:36:51,259 INFO L481 AbstractCegarLoop]: Abstraction has 26226 states and 37841 transitions. [2020-12-22 07:36:51,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:36:51,260 INFO L276 IsEmpty]: Start isEmpty. Operand 26226 states and 37841 transitions. [2020-12-22 07:36:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:36:51,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:36:51,271 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:36:51,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:36:51,272 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:36:51,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:36:51,272 INFO L82 PathProgramCache]: Analyzing trace with hash -491292480, now seen corresponding path program 1 times [2020-12-22 07:36:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:36:51,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43063249] [2020-12-22 07:36:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:36:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:36:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 07:36:51,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43063249] [2020-12-22 07:36:51,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:36:51,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:36:51,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770507789] [2020-12-22 07:36:51,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:36:51,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:36:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:36:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:36:51,429 INFO L87 Difference]: Start difference. First operand 26226 states and 37841 transitions. Second operand 8 states. [2020-12-22 07:36:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:36:57,775 INFO L93 Difference]: Finished difference Result 108992 states and 157672 transitions. [2020-12-22 07:36:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:36:57,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:36:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:36:57,913 INFO L225 Difference]: With dead ends: 108992 [2020-12-22 07:36:57,913 INFO L226 Difference]: Without dead ends: 95902 [2020-12-22 07:36:57,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:36:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95902 states. [2020-12-22 07:37:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95902 to 45874. [2020-12-22 07:37:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45874 states. [2020-12-22 07:37:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45874 states to 45874 states and 65921 transitions. [2020-12-22 07:37:02,026 INFO L78 Accepts]: Start accepts. Automaton has 45874 states and 65921 transitions. Word has length 110 [2020-12-22 07:37:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:02,027 INFO L481 AbstractCegarLoop]: Abstraction has 45874 states and 65921 transitions. [2020-12-22 07:37:02,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 45874 states and 65921 transitions. [2020-12-22 07:37:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:37:02,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:02,042 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:37:02,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:37:02,042 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash 978140502, now seen corresponding path program 1 times [2020-12-22 07:37:02,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:02,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619043837] [2020-12-22 07:37:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:37:02,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619043837] [2020-12-22 07:37:02,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:02,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:37:02,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837319981] [2020-12-22 07:37:02,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:37:02,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:37:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:37:02,202 INFO L87 Difference]: Start difference. First operand 45874 states and 65921 transitions. Second operand 8 states. [2020-12-22 07:37:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:10,186 INFO L93 Difference]: Finished difference Result 122080 states and 176488 transitions. [2020-12-22 07:37:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:10,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:37:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:10,350 INFO L225 Difference]: With dead ends: 122080 [2020-12-22 07:37:10,350 INFO L226 Difference]: Without dead ends: 108990 [2020-12-22 07:37:10,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108990 states. [2020-12-22 07:37:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108990 to 58962. [2020-12-22 07:37:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58962 states. [2020-12-22 07:37:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58962 states to 58962 states and 84737 transitions. [2020-12-22 07:37:15,430 INFO L78 Accepts]: Start accepts. Automaton has 58962 states and 84737 transitions. Word has length 110 [2020-12-22 07:37:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:15,431 INFO L481 AbstractCegarLoop]: Abstraction has 58962 states and 84737 transitions. [2020-12-22 07:37:15,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 58962 states and 84737 transitions. [2020-12-22 07:37:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:37:15,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:15,446 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:37:15,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:37:15,446 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:15,447 INFO L82 PathProgramCache]: Analyzing trace with hash -257318538, now seen corresponding path program 1 times [2020-12-22 07:37:15,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:15,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630694081] [2020-12-22 07:37:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:37:15,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630694081] [2020-12-22 07:37:15,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:15,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:37:15,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413568631] [2020-12-22 07:37:15,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:37:15,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:37:15,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:37:15,596 INFO L87 Difference]: Start difference. First operand 58962 states and 84737 transitions. Second operand 8 states. [2020-12-22 07:37:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:24,584 INFO L93 Difference]: Finished difference Result 135168 states and 195304 transitions. [2020-12-22 07:37:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:24,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:37:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:24,915 INFO L225 Difference]: With dead ends: 135168 [2020-12-22 07:37:24,916 INFO L226 Difference]: Without dead ends: 122078 [2020-12-22 07:37:24,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122078 states. [2020-12-22 07:37:31,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122078 to 72050. [2020-12-22 07:37:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72050 states. [2020-12-22 07:37:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72050 states to 72050 states and 103553 transitions. [2020-12-22 07:37:31,296 INFO L78 Accepts]: Start accepts. Automaton has 72050 states and 103553 transitions. Word has length 110 [2020-12-22 07:37:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:31,296 INFO L481 AbstractCegarLoop]: Abstraction has 72050 states and 103553 transitions. [2020-12-22 07:37:31,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 72050 states and 103553 transitions. [2020-12-22 07:37:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:37:31,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:31,311 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:37:31,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:37:31,311 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:31,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:31,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1678314090, now seen corresponding path program 1 times [2020-12-22 07:37:31,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:31,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058316564] [2020-12-22 07:37:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:37:31,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058316564] [2020-12-22 07:37:31,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:31,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:37:31,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042057833] [2020-12-22 07:37:31,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:37:31,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:37:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:37:31,477 INFO L87 Difference]: Start difference. First operand 72050 states and 103553 transitions. Second operand 8 states. [2020-12-22 07:37:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:37:42,325 INFO L93 Difference]: Finished difference Result 148256 states and 214120 transitions. [2020-12-22 07:37:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:37:42,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:37:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:37:42,472 INFO L225 Difference]: With dead ends: 148256 [2020-12-22 07:37:42,472 INFO L226 Difference]: Without dead ends: 135166 [2020-12-22 07:37:42,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:37:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135166 states. [2020-12-22 07:37:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135166 to 85138. [2020-12-22 07:37:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85138 states. [2020-12-22 07:37:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85138 states to 85138 states and 122369 transitions. [2020-12-22 07:37:50,403 INFO L78 Accepts]: Start accepts. Automaton has 85138 states and 122369 transitions. Word has length 110 [2020-12-22 07:37:50,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:37:50,404 INFO L481 AbstractCegarLoop]: Abstraction has 85138 states and 122369 transitions. [2020-12-22 07:37:50,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:37:50,404 INFO L276 IsEmpty]: Start isEmpty. Operand 85138 states and 122369 transitions. [2020-12-22 07:37:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:37:50,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:37:50,419 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:37:50,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:37:50,419 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:37:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:37:50,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2050832822, now seen corresponding path program 1 times [2020-12-22 07:37:50,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:37:50,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842924256] [2020-12-22 07:37:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:37:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:37:50,722 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-12-22 07:37:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:37:50,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842924256] [2020-12-22 07:37:50,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:37:50,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:37:50,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412108392] [2020-12-22 07:37:50,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:37:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:37:50,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:37:50,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:37:50,779 INFO L87 Difference]: Start difference. First operand 85138 states and 122369 transitions. Second operand 8 states. [2020-12-22 07:38:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:03,287 INFO L93 Difference]: Finished difference Result 156672 states and 226344 transitions. [2020-12-22 07:38:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:38:03,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2020-12-22 07:38:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:03,446 INFO L225 Difference]: With dead ends: 156672 [2020-12-22 07:38:03,446 INFO L226 Difference]: Without dead ends: 145918 [2020-12-22 07:38:03,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:38:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145918 states. [2020-12-22 07:38:12,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145918 to 95890. [2020-12-22 07:38:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95890 states. [2020-12-22 07:38:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95890 states to 95890 states and 137921 transitions. [2020-12-22 07:38:12,977 INFO L78 Accepts]: Start accepts. Automaton has 95890 states and 137921 transitions. Word has length 110 [2020-12-22 07:38:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:12,977 INFO L481 AbstractCegarLoop]: Abstraction has 95890 states and 137921 transitions. [2020-12-22 07:38:12,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:38:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 95890 states and 137921 transitions. [2020-12-22 07:38:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:38:12,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:12,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:38:12,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:38:12,994 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:12,995 INFO L82 PathProgramCache]: Analyzing trace with hash 298519595, now seen corresponding path program 1 times [2020-12-22 07:38:12,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:12,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317763858] [2020-12-22 07:38:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:13,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317763858] [2020-12-22 07:38:13,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:13,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:13,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973938653] [2020-12-22 07:38:13,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:13,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:13,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:13,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:13,057 INFO L87 Difference]: Start difference. First operand 95890 states and 137921 transitions. Second operand 3 states. [2020-12-22 07:38:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:22,118 INFO L93 Difference]: Finished difference Result 191734 states and 275795 transitions. [2020-12-22 07:38:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:22,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-22 07:38:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:22,355 INFO L225 Difference]: With dead ends: 191734 [2020-12-22 07:38:22,355 INFO L226 Difference]: Without dead ends: 95892 [2020-12-22 07:38:22,423 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 07:38:22,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95892 states. [2020-12-22 07:38:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95892 to 95890. [2020-12-22 07:38:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95890 states. [2020-12-22 07:38:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95890 states to 95890 states and 136753 transitions. [2020-12-22 07:38:31,622 INFO L78 Accepts]: Start accepts. Automaton has 95890 states and 136753 transitions. Word has length 111 [2020-12-22 07:38:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:31,622 INFO L481 AbstractCegarLoop]: Abstraction has 95890 states and 136753 transitions. [2020-12-22 07:38:31,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 95890 states and 136753 transitions. [2020-12-22 07:38:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:38:31,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:31,630 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:38:31,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:38:31,630 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash 211400801, now seen corresponding path program 1 times [2020-12-22 07:38:31,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:31,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726485012] [2020-12-22 07:38:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:31,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726485012] [2020-12-22 07:38:31,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:38:31,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:38:31,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389660483] [2020-12-22 07:38:31,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:38:31,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:31,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:38:31,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:38:31,692 INFO L87 Difference]: Start difference. First operand 95890 states and 136753 transitions. Second operand 3 states. [2020-12-22 07:38:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:38:36,743 INFO L93 Difference]: Finished difference Result 143814 states and 205107 transitions. [2020-12-22 07:38:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:38:36,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-22 07:38:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:38:36,794 INFO L225 Difference]: With dead ends: 143814 [2020-12-22 07:38:36,795 INFO L226 Difference]: Without dead ends: 47972 [2020-12-22 07:38:36,836 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 07:38:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47972 states. [2020-12-22 07:38:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47972 to 47970. [2020-12-22 07:38:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47970 states. [2020-12-22 07:38:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47970 states to 47970 states and 67817 transitions. [2020-12-22 07:38:41,609 INFO L78 Accepts]: Start accepts. Automaton has 47970 states and 67817 transitions. Word has length 111 [2020-12-22 07:38:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:38:41,609 INFO L481 AbstractCegarLoop]: Abstraction has 47970 states and 67817 transitions. [2020-12-22 07:38:41,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:38:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 47970 states and 67817 transitions. [2020-12-22 07:38:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:38:41,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:38:41,615 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:38:41,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:38:41,616 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:38:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:38:41,616 INFO L82 PathProgramCache]: Analyzing trace with hash -907874409, now seen corresponding path program 1 times [2020-12-22 07:38:41,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:38:41,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116821437] [2020-12-22 07:38:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:38:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:38:41,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116821437] [2020-12-22 07:38:41,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429827239] [2020-12-22 07:38:41,839 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 07:38:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:38:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:38:42,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:38:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:38:42,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:38:42,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:38:42,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643841049] [2020-12-22 07:38:42,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:38:42,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:38:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:38:42,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:38:42,491 INFO L87 Difference]: Start difference. First operand 47970 states and 67817 transitions. Second operand 12 states. [2020-12-22 07:39:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:39:21,446 INFO L93 Difference]: Finished difference Result 380046 states and 532939 transitions. [2020-12-22 07:39:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 07:39:21,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-12-22 07:39:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:39:22,301 INFO L225 Difference]: With dead ends: 380046 [2020-12-22 07:39:22,302 INFO L226 Difference]: Without dead ends: 332124 [2020-12-22 07:39:22,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=797, Invalid=3109, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 07:39:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332124 states.