/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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:33:15,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:33:15,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:33:15,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:33:15,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:33:15,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:33:15,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:33:15,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:33:15,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:33:15,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:33:15,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:33:15,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:33:15,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:33:15,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:33:15,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:33:15,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:33:15,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:33:15,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:33:15,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:33:15,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:33:15,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:33:15,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:33:15,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:33:15,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:33:15,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:33:15,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:33:15,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:33:15,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:33:15,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:33:15,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:33:15,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:33:15,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:33:15,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:33:15,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:33:15,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:33:15,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:33:15,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:33:16,006 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:33:16,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:33:16,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:33:16,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:33:16,010 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:33:16,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:33:16,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:33:16,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:33:16,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:33:16,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:33:16,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:33:16,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:33:16,014 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:33:16,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:33:16,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:33:16,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:33:16,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:33:16,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:33:16,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:33:16,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:33:16,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:33:16,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:33:16,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:33:16,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:33:16,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:33:16,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:33:16,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:33:16,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:33:16,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:33:16,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:33:16,388 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:33:16,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label01.c [2020-12-22 09:33:16,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38a30b4f/d10efb5482024619a1436253a0a1d97b/FLAGf500dcac5 [2020-12-22 09:33:17,502 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:33:17,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label01.c [2020-12-22 09:33:17,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38a30b4f/d10efb5482024619a1436253a0a1d97b/FLAGf500dcac5 [2020-12-22 09:33:18,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e38a30b4f/d10efb5482024619a1436253a0a1d97b [2020-12-22 09:33:18,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:33:18,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:33:18,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:33:18,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:33:18,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:33:18,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:33:18" (1/1) ... [2020-12-22 09:33:18,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7210f482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:18, skipping insertion in model container [2020-12-22 09:33:18,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:33:18" (1/1) ... [2020-12-22 09:33:18,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:33:18,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:33:18,525 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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label01.c[6449,6462] [2020-12-22 09:33:18,579 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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label01.c[11761,11774] [2020-12-22 09:33:19,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:33:19,646 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:33:19,706 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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label01.c[6449,6462] [2020-12-22 09:33:19,719 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/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label01.c[11761,11774] [2020-12-22 09:33:20,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:33:20,446 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:33:20,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20 WrapperNode [2020-12-22 09:33:20,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:33:20,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:33:20,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:33:20,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:33:20,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:20,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:20,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:33:20,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:33:20,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:33:20,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:33:20,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:20,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:20,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:20,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:21,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:21,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:21,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (1/1) ... [2020-12-22 09:33:21,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:33:21,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:33:21,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:33:21,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:33:21,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (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 09:33:21,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:33:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:33:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:33:21,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:33:26,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:33:26,201 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:33:26,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:33:26 BoogieIcfgContainer [2020-12-22 09:33:26,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:33:26,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:33:26,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:33:26,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:33:26,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:33:18" (1/3) ... [2020-12-22 09:33:26,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcd2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:33:26, skipping insertion in model container [2020-12-22 09:33:26,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:33:20" (2/3) ... [2020-12-22 09:33:26,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bcd2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:33:26, skipping insertion in model container [2020-12-22 09:33:26,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:33:26" (3/3) ... [2020-12-22 09:33:26,215 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label01.c [2020-12-22 09:33:26,222 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:33:26,228 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:33:26,248 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:33:26,283 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:33:26,283 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:33:26,284 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:33:26,284 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:33:26,284 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:33:26,284 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:33:26,284 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:33:26,284 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:33:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:33:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:33:26,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:26,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:26,346 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:26,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:26,353 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:33:26,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:26,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793748046] [2020-12-22 09:33:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:26,596 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 09:33:26,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793748046] [2020-12-22 09:33:26,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:26,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:33:26,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971234575] [2020-12-22 09:33:26,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:33:26,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:26,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:33:26,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:33:26,625 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 2 states. [2020-12-22 09:33:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:26,717 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2020-12-22 09:33:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:33:26,719 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:33:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:26,757 INFO L225 Difference]: With dead ends: 1734 [2020-12-22 09:33:26,758 INFO L226 Difference]: Without dead ends: 812 [2020-12-22 09:33:26,768 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 09:33:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-12-22 09:33:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2020-12-22 09:33:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:33:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2020-12-22 09:33:26,939 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2020-12-22 09:33:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:26,939 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2020-12-22 09:33:26,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:33:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2020-12-22 09:33:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:33:26,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:26,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:26,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:33:26,943 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:26,944 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:33:26,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:26,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735283780] [2020-12-22 09:33:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:27,142 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 09:33:27,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735283780] [2020-12-22 09:33:27,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:27,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:27,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017903624] [2020-12-22 09:33:27,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:27,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:27,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:27,149 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand 5 states. [2020-12-22 09:33:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:27,242 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2020-12-22 09:33:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:33:27,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:33:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:27,247 INFO L225 Difference]: With dead ends: 888 [2020-12-22 09:33:27,248 INFO L226 Difference]: Without dead ends: 848 [2020-12-22 09:33:27,249 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 09:33:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-12-22 09:33:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2020-12-22 09:33:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:33:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2020-12-22 09:33:27,269 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2020-12-22 09:33:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:27,270 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2020-12-22 09:33:27,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2020-12-22 09:33:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:27,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:27,272 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] [2020-12-22 09:33:27,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:33:27,272 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:33:27,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:27,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040198529] [2020-12-22 09:33:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:27,370 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 09:33:27,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040198529] [2020-12-22 09:33:27,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:27,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:27,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131912095] [2020-12-22 09:33:27,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:27,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:27,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:27,375 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand 3 states. [2020-12-22 09:33:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:27,407 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2020-12-22 09:33:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:27,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:33:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:27,413 INFO L225 Difference]: With dead ends: 878 [2020-12-22 09:33:27,413 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:33:27,414 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 09:33:27,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:33:27,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2020-12-22 09:33:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-12-22 09:33:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2020-12-22 09:33:27,436 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2020-12-22 09:33:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:27,437 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2020-12-22 09:33:27,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2020-12-22 09:33:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:33:27,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:27,439 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] [2020-12-22 09:33:27,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:33:27,440 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:33:27,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:27,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347983558] [2020-12-22 09:33:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:27,511 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 09:33:27,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347983558] [2020-12-22 09:33:27,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:27,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:27,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950704435] [2020-12-22 09:33:27,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:27,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:27,514 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand 5 states. [2020-12-22 09:33:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:27,668 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2020-12-22 09:33:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:33:27,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:33:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:27,676 INFO L225 Difference]: With dead ends: 1224 [2020-12-22 09:33:27,676 INFO L226 Difference]: Without dead ends: 1160 [2020-12-22 09:33:27,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:33:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2020-12-22 09:33:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2020-12-22 09:33:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-12-22 09:33:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2020-12-22 09:33:27,710 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2020-12-22 09:33:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:27,711 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2020-12-22 09:33:27,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2020-12-22 09:33:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:27,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:27,719 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] [2020-12-22 09:33:27,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:33:27,720 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:27,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:27,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:33:27,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:27,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854712803] [2020-12-22 09:33:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:27,788 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 09:33:27,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854712803] [2020-12-22 09:33:27,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:27,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:27,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383661285] [2020-12-22 09:33:27,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:27,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:27,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:27,791 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand 3 states. [2020-12-22 09:33:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:27,832 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2020-12-22 09:33:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:27,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:27,838 INFO L225 Difference]: With dead ends: 1089 [2020-12-22 09:33:27,839 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:33:27,840 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 09:33:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:33:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:33:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:33:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2020-12-22 09:33:27,868 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2020-12-22 09:33:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:27,869 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2020-12-22 09:33:27,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:27,872 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2020-12-22 09:33:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:27,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:27,873 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] [2020-12-22 09:33:27,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:33:27,874 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:33:27,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:27,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523208753] [2020-12-22 09:33:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:28,046 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 09:33:28,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523208753] [2020-12-22 09:33:28,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:28,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:28,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833202486] [2020-12-22 09:33:28,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:28,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:28,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:28,049 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand 5 states. [2020-12-22 09:33:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:28,149 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2020-12-22 09:33:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:28,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:33:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:28,156 INFO L225 Difference]: With dead ends: 1146 [2020-12-22 09:33:28,156 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:33:28,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:33:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:33:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:33:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:33:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2020-12-22 09:33:28,183 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2020-12-22 09:33:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:28,184 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2020-12-22 09:33:28,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2020-12-22 09:33:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:28,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:28,185 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] [2020-12-22 09:33:28,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:33:28,185 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:28,186 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:33:28,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:28,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009046109] [2020-12-22 09:33:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:28,229 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 09:33:28,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009046109] [2020-12-22 09:33:28,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:28,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906696791] [2020-12-22 09:33:28,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:28,232 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand 3 states. [2020-12-22 09:33:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:28,274 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2020-12-22 09:33:28,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:28,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:28,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:28,281 INFO L225 Difference]: With dead ends: 1291 [2020-12-22 09:33:28,281 INFO L226 Difference]: Without dead ends: 1108 [2020-12-22 09:33:28,282 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 09:33:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2020-12-22 09:33:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2020-12-22 09:33:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2020-12-22 09:33:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2020-12-22 09:33:28,319 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2020-12-22 09:33:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:28,319 INFO L481 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2020-12-22 09:33:28,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2020-12-22 09:33:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:33:28,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:28,320 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] [2020-12-22 09:33:28,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:33:28,321 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:28,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:33:28,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:28,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280839426] [2020-12-22 09:33:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:28,361 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 09:33:28,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280839426] [2020-12-22 09:33:28,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:28,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:28,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429485120] [2020-12-22 09:33:28,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:28,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:28,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:28,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:28,364 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand 3 states. [2020-12-22 09:33:28,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:28,414 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2020-12-22 09:33:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:28,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:33:28,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:28,423 INFO L225 Difference]: With dead ends: 1690 [2020-12-22 09:33:28,424 INFO L226 Difference]: Without dead ends: 1362 [2020-12-22 09:33:28,425 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 09:33:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2020-12-22 09:33:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2020-12-22 09:33:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2020-12-22 09:33:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2020-12-22 09:33:28,472 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2020-12-22 09:33:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:28,472 INFO L481 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2020-12-22 09:33:28,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2020-12-22 09:33:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:33:28,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:28,473 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] [2020-12-22 09:33:28,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:33:28,474 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:33:28,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:28,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678651942] [2020-12-22 09:33:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:28,548 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 09:33:28,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678651942] [2020-12-22 09:33:28,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:28,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:28,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265347713] [2020-12-22 09:33:28,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:28,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:28,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:28,551 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand 5 states. [2020-12-22 09:33:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:28,745 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2020-12-22 09:33:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:33:28,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:33:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:28,758 INFO L225 Difference]: With dead ends: 1883 [2020-12-22 09:33:28,758 INFO L226 Difference]: Without dead ends: 1881 [2020-12-22 09:33:28,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:33:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-12-22 09:33:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2020-12-22 09:33:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2020-12-22 09:33:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2020-12-22 09:33:28,851 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2020-12-22 09:33:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:28,851 INFO L481 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2020-12-22 09:33:28,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2020-12-22 09:33:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:33:28,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:28,853 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] [2020-12-22 09:33:28,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:33:28,853 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash -105607243, now seen corresponding path program 1 times [2020-12-22 09:33:28,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:28,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400129195] [2020-12-22 09:33:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:28,934 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 09:33:28,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400129195] [2020-12-22 09:33:28,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:28,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:33:28,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041681071] [2020-12-22 09:33:28,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:28,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:28,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:28,940 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand 3 states. [2020-12-22 09:33:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:34,672 INFO L93 Difference]: Finished difference Result 2912 states and 5225 transitions. [2020-12-22 09:33:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:34,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 09:33:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:34,693 INFO L225 Difference]: With dead ends: 2912 [2020-12-22 09:33:34,693 INFO L226 Difference]: Without dead ends: 2159 [2020-12-22 09:33:34,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-12-22 09:33:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2159. [2020-12-22 09:33:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2159 states. [2020-12-22 09:33:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3727 transitions. [2020-12-22 09:33:34,797 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3727 transitions. Word has length 48 [2020-12-22 09:33:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:34,798 INFO L481 AbstractCegarLoop]: Abstraction has 2159 states and 3727 transitions. [2020-12-22 09:33:34,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3727 transitions. [2020-12-22 09:33:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:34,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:34,800 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:34,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:33:34,800 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:33:34,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:34,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084322966] [2020-12-22 09:33:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:33:34,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084322966] [2020-12-22 09:33:34,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:34,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:34,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001099464] [2020-12-22 09:33:34,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:34,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:34,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:34,907 INFO L87 Difference]: Start difference. First operand 2159 states and 3727 transitions. Second operand 5 states. [2020-12-22 09:33:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:35,125 INFO L93 Difference]: Finished difference Result 4187 states and 6575 transitions. [2020-12-22 09:33:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:35,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:35,146 INFO L225 Difference]: With dead ends: 4187 [2020-12-22 09:33:35,146 INFO L226 Difference]: Without dead ends: 3557 [2020-12-22 09:33:35,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:33:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2020-12-22 09:33:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2020-12-22 09:33:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2787 states. [2020-12-22 09:33:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4603 transitions. [2020-12-22 09:33:35,277 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4603 transitions. Word has length 64 [2020-12-22 09:33:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:35,323 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 4603 transitions. [2020-12-22 09:33:35,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:35,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4603 transitions. [2020-12-22 09:33:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:35,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:35,325 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:35,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:33:35,326 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:35,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:33:35,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:35,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846243597] [2020-12-22 09:33:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:33:35,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846243597] [2020-12-22 09:33:35,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:35,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:35,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864448883] [2020-12-22 09:33:35,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:35,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:35,412 INFO L87 Difference]: Start difference. First operand 2787 states and 4603 transitions. Second operand 5 states. [2020-12-22 09:33:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:35,641 INFO L93 Difference]: Finished difference Result 4815 states and 7451 transitions. [2020-12-22 09:33:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:35,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:35,664 INFO L225 Difference]: With dead ends: 4815 [2020-12-22 09:33:35,664 INFO L226 Difference]: Without dead ends: 4185 [2020-12-22 09:33:35,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:33:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2020-12-22 09:33:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2020-12-22 09:33:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3731 states. [2020-12-22 09:33:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5907 transitions. [2020-12-22 09:33:35,858 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5907 transitions. Word has length 64 [2020-12-22 09:33:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:35,858 INFO L481 AbstractCegarLoop]: Abstraction has 3731 states and 5907 transitions. [2020-12-22 09:33:35,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5907 transitions. [2020-12-22 09:33:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:33:35,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:35,860 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] [2020-12-22 09:33:35,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:33:35,861 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:33:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:35,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171555892] [2020-12-22 09:33:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:35,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171555892] [2020-12-22 09:33:35,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:35,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:35,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742721468] [2020-12-22 09:33:35,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:33:35,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:33:35,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:33:35,945 INFO L87 Difference]: Start difference. First operand 3731 states and 5907 transitions. Second operand 5 states. [2020-12-22 09:33:36,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:36,187 INFO L93 Difference]: Finished difference Result 5083 states and 7831 transitions. [2020-12-22 09:33:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:33:36,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:33:36,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:36,231 INFO L225 Difference]: With dead ends: 5083 [2020-12-22 09:33:36,231 INFO L226 Difference]: Without dead ends: 4633 [2020-12-22 09:33:36,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:33:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2020-12-22 09:33:36,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2020-12-22 09:33:36,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:33:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6539 transitions. [2020-12-22 09:33:36,453 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6539 transitions. Word has length 64 [2020-12-22 09:33:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:36,454 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6539 transitions. [2020-12-22 09:33:36,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:33:36,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6539 transitions. [2020-12-22 09:33:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:36,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:36,458 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] [2020-12-22 09:33:36,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:33:36,459 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:33:36,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:36,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633177363] [2020-12-22 09:33:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:36,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633177363] [2020-12-22 09:33:36,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:36,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008548706] [2020-12-22 09:33:36,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:36,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:36,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:36,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:36,536 INFO L87 Difference]: Start difference. First operand 4179 states and 6539 transitions. Second operand 3 states. [2020-12-22 09:33:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:36,709 INFO L93 Difference]: Finished difference Result 6831 states and 10241 transitions. [2020-12-22 09:33:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:36,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:33:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:36,720 INFO L225 Difference]: With dead ends: 6831 [2020-12-22 09:33:36,720 INFO L226 Difference]: Without dead ends: 4181 [2020-12-22 09:33:36,726 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 09:33:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2020-12-22 09:33:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2020-12-22 09:33:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4179 states. [2020-12-22 09:33:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6489 transitions. [2020-12-22 09:33:36,940 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6489 transitions. Word has length 65 [2020-12-22 09:33:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:36,941 INFO L481 AbstractCegarLoop]: Abstraction has 4179 states and 6489 transitions. [2020-12-22 09:33:36,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6489 transitions. [2020-12-22 09:33:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:36,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:36,946 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] [2020-12-22 09:33:36,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:33:36,946 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:33:36,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:36,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456349331] [2020-12-22 09:33:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456349331] [2020-12-22 09:33:37,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:37,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:37,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959607343] [2020-12-22 09:33:37,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:37,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:37,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:37,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:37,002 INFO L87 Difference]: Start difference. First operand 4179 states and 6489 transitions. Second operand 3 states. [2020-12-22 09:33:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:37,149 INFO L93 Difference]: Finished difference Result 5507 states and 8316 transitions. [2020-12-22 09:33:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:37,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:33:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:37,157 INFO L225 Difference]: With dead ends: 5507 [2020-12-22 09:33:37,157 INFO L226 Difference]: Without dead ends: 2857 [2020-12-22 09:33:37,161 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 09:33:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2020-12-22 09:33:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2020-12-22 09:33:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2855 states. [2020-12-22 09:33:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4639 transitions. [2020-12-22 09:33:37,267 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4639 transitions. Word has length 65 [2020-12-22 09:33:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:37,267 INFO L481 AbstractCegarLoop]: Abstraction has 2855 states and 4639 transitions. [2020-12-22 09:33:37,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4639 transitions. [2020-12-22 09:33:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:33:37,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:37,268 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:33:37,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:33:37,269 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:37,269 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:33:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:37,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607607578] [2020-12-22 09:33:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:37,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607607578] [2020-12-22 09:33:37,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291724041] [2020-12-22 09:33:37,365 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 09:33:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:37,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:33:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:33:37,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:37,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:33:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501783452] [2020-12-22 09:33:37,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:33:37,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:37,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:33:37,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:33:37,713 INFO L87 Difference]: Start difference. First operand 2855 states and 4639 transitions. Second operand 10 states. [2020-12-22 09:33:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:38,051 INFO L93 Difference]: Finished difference Result 4704 states and 7176 transitions. [2020-12-22 09:33:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:33:38,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:33:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:38,061 INFO L225 Difference]: With dead ends: 4704 [2020-12-22 09:33:38,061 INFO L226 Difference]: Without dead ends: 3694 [2020-12-22 09:33:38,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:33:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2020-12-22 09:33:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3661. [2020-12-22 09:33:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3661 states. [2020-12-22 09:33:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 5695 transitions. [2020-12-22 09:33:38,242 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 5695 transitions. Word has length 65 [2020-12-22 09:33:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:38,243 INFO L481 AbstractCegarLoop]: Abstraction has 3661 states and 5695 transitions. [2020-12-22 09:33:38,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:33:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 5695 transitions. [2020-12-22 09:33:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:38,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:38,244 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:38,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:33:38,458 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:38,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:38,458 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:33:38,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:38,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145773691] [2020-12-22 09:33:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:38,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145773691] [2020-12-22 09:33:38,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140132283] [2020-12-22 09:33:38,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:33:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:33:38,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:39,067 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:33:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:39,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:39,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:33:39,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319295211] [2020-12-22 09:33:39,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:33:39,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:39,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:33:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:33:39,350 INFO L87 Difference]: Start difference. First operand 3661 states and 5695 transitions. Second operand 17 states. [2020-12-22 09:33:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:41,467 INFO L93 Difference]: Finished difference Result 10680 states and 14965 transitions. [2020-12-22 09:33:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:33:41,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:33:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:41,488 INFO L225 Difference]: With dead ends: 10680 [2020-12-22 09:33:41,488 INFO L226 Difference]: Without dead ends: 9189 [2020-12-22 09:33:41,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:33:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2020-12-22 09:33:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 6136. [2020-12-22 09:33:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6136 states. [2020-12-22 09:33:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 8973 transitions. [2020-12-22 09:33:41,941 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 8973 transitions. Word has length 66 [2020-12-22 09:33:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:41,941 INFO L481 AbstractCegarLoop]: Abstraction has 6136 states and 8973 transitions. [2020-12-22 09:33:41,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:33:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 8973 transitions. [2020-12-22 09:33:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:41,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:41,943 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:42,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:33:42,158 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:42,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:33:42,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:42,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83224301] [2020-12-22 09:33:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:42,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83224301] [2020-12-22 09:33:42,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837391955] [2020-12-22 09:33:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:33:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:42,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:33:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:42,641 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:33:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:42,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:42,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:33:42,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978753470] [2020-12-22 09:33:42,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:33:42,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:33:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:33:42,938 INFO L87 Difference]: Start difference. First operand 6136 states and 8973 transitions. Second operand 17 states. [2020-12-22 09:33:43,534 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-12-22 09:33:45,672 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:33:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:47,443 INFO L93 Difference]: Finished difference Result 29250 states and 39545 transitions. [2020-12-22 09:33:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:33:47,444 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:33:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:47,499 INFO L225 Difference]: With dead ends: 29250 [2020-12-22 09:33:47,499 INFO L226 Difference]: Without dead ends: 24643 [2020-12-22 09:33:47,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:33:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24643 states. [2020-12-22 09:33:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24643 to 11635. [2020-12-22 09:33:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11635 states. [2020-12-22 09:33:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 16100 transitions. [2020-12-22 09:33:48,551 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 16100 transitions. Word has length 66 [2020-12-22 09:33:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:48,551 INFO L481 AbstractCegarLoop]: Abstraction has 11635 states and 16100 transitions. [2020-12-22 09:33:48,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:33:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 16100 transitions. [2020-12-22 09:33:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:48,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:48,553 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:48,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:33:48,767 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:33:48,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:48,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908023136] [2020-12-22 09:33:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:48,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908023136] [2020-12-22 09:33:48,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556473100] [2020-12-22 09:33:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:33:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:49,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:33:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:33:49,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:33:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:49,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:33:49,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-12-22 09:33:49,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840182735] [2020-12-22 09:33:49,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:33:49,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:49,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:33:49,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:33:49,525 INFO L87 Difference]: Start difference. First operand 11635 states and 16100 transitions. Second operand 18 states. [2020-12-22 09:33:53,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:53,747 INFO L93 Difference]: Finished difference Result 54429 states and 71436 transitions. [2020-12-22 09:33:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:33:53,748 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2020-12-22 09:33:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:53,838 INFO L225 Difference]: With dead ends: 54429 [2020-12-22 09:33:53,839 INFO L226 Difference]: Without dead ends: 44323 [2020-12-22 09:33:53,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 09:33:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44323 states. [2020-12-22 09:33:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44323 to 29071. [2020-12-22 09:33:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29071 states. [2020-12-22 09:33:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29071 states to 29071 states and 38528 transitions. [2020-12-22 09:33:56,284 INFO L78 Accepts]: Start accepts. Automaton has 29071 states and 38528 transitions. Word has length 66 [2020-12-22 09:33:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:56,284 INFO L481 AbstractCegarLoop]: Abstraction has 29071 states and 38528 transitions. [2020-12-22 09:33:56,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:33:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 29071 states and 38528 transitions. [2020-12-22 09:33:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:56,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:56,286 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:56,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:33:56,493 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:56,494 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:33:56,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:56,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367815543] [2020-12-22 09:33:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:56,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:33:56,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367815543] [2020-12-22 09:33:56,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:56,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:33:56,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971336739] [2020-12-22 09:33:56,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:33:56,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:33:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:33:56,543 INFO L87 Difference]: Start difference. First operand 29071 states and 38528 transitions. Second operand 3 states. [2020-12-22 09:33:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:57,562 INFO L93 Difference]: Finished difference Result 41067 states and 54058 transitions. [2020-12-22 09:33:57,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:33:57,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:33:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:57,587 INFO L225 Difference]: With dead ends: 41067 [2020-12-22 09:33:57,592 INFO L226 Difference]: Without dead ends: 13525 [2020-12-22 09:33:57,617 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 09:33:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13525 states. [2020-12-22 09:33:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13525 to 12473. [2020-12-22 09:33:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12473 states. [2020-12-22 09:33:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12473 states to 12473 states and 16817 transitions. [2020-12-22 09:33:58,511 INFO L78 Accepts]: Start accepts. Automaton has 12473 states and 16817 transitions. Word has length 66 [2020-12-22 09:33:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:33:58,512 INFO L481 AbstractCegarLoop]: Abstraction has 12473 states and 16817 transitions. [2020-12-22 09:33:58,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:33:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 12473 states and 16817 transitions. [2020-12-22 09:33:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:33:58,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:33:58,513 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:33:58,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:33:58,514 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:33:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:33:58,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:33:58,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:33:58,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528705847] [2020-12-22 09:33:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:33:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:33:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:33:58,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528705847] [2020-12-22 09:33:58,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:33:58,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:33:58,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59445967] [2020-12-22 09:33:58,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:33:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:33:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:33:58,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:33:58,587 INFO L87 Difference]: Start difference. First operand 12473 states and 16817 transitions. Second operand 6 states. [2020-12-22 09:33:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:33:59,584 INFO L93 Difference]: Finished difference Result 18254 states and 24309 transitions. [2020-12-22 09:33:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:33:59,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:33:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:33:59,601 INFO L225 Difference]: With dead ends: 18254 [2020-12-22 09:33:59,602 INFO L226 Difference]: Without dead ends: 7387 [2020-12-22 09:33:59,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:33:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7387 states. [2020-12-22 09:34:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7387 to 7387. [2020-12-22 09:34:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7387 states. [2020-12-22 09:34:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7387 states to 7387 states and 10240 transitions. [2020-12-22 09:34:00,156 INFO L78 Accepts]: Start accepts. Automaton has 7387 states and 10240 transitions. Word has length 66 [2020-12-22 09:34:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:00,157 INFO L481 AbstractCegarLoop]: Abstraction has 7387 states and 10240 transitions. [2020-12-22 09:34:00,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 7387 states and 10240 transitions. [2020-12-22 09:34:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:00,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:00,158 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:00,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:34:00,159 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:34:00,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:00,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197676654] [2020-12-22 09:34:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:34:00,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197676654] [2020-12-22 09:34:00,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:00,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:00,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477035746] [2020-12-22 09:34:00,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:00,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:00,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:00,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:00,216 INFO L87 Difference]: Start difference. First operand 7387 states and 10240 transitions. Second operand 6 states. [2020-12-22 09:34:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:00,823 INFO L93 Difference]: Finished difference Result 11746 states and 15776 transitions. [2020-12-22 09:34:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:00,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:34:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:00,833 INFO L225 Difference]: With dead ends: 11746 [2020-12-22 09:34:00,833 INFO L226 Difference]: Without dead ends: 5979 [2020-12-22 09:34:00,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2020-12-22 09:34:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5979. [2020-12-22 09:34:01,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5979 states. [2020-12-22 09:34:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5979 states to 5979 states and 8366 transitions. [2020-12-22 09:34:01,430 INFO L78 Accepts]: Start accepts. Automaton has 5979 states and 8366 transitions. Word has length 66 [2020-12-22 09:34:01,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:01,430 INFO L481 AbstractCegarLoop]: Abstraction has 5979 states and 8366 transitions. [2020-12-22 09:34:01,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5979 states and 8366 transitions. [2020-12-22 09:34:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:34:01,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:01,432 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:01,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:34:01,433 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:01,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:34:01,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:01,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703868537] [2020-12-22 09:34:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:34:01,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703868537] [2020-12-22 09:34:01,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:34:01,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:34:01,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302833677] [2020-12-22 09:34:01,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:34:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:34:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:34:01,493 INFO L87 Difference]: Start difference. First operand 5979 states and 8366 transitions. Second operand 6 states. [2020-12-22 09:34:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:02,159 INFO L93 Difference]: Finished difference Result 12794 states and 16970 transitions. [2020-12-22 09:34:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:34:02,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:34:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:02,167 INFO L225 Difference]: With dead ends: 12794 [2020-12-22 09:34:02,167 INFO L226 Difference]: Without dead ends: 8376 [2020-12-22 09:34:02,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:34:02,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2020-12-22 09:34:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 7798. [2020-12-22 09:34:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7798 states. [2020-12-22 09:34:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7798 states to 7798 states and 10621 transitions. [2020-12-22 09:34:02,819 INFO L78 Accepts]: Start accepts. Automaton has 7798 states and 10621 transitions. Word has length 66 [2020-12-22 09:34:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:02,819 INFO L481 AbstractCegarLoop]: Abstraction has 7798 states and 10621 transitions. [2020-12-22 09:34:02,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:34:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7798 states and 10621 transitions. [2020-12-22 09:34:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:02,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:02,820 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:02,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:34:02,820 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:34:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:02,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271319628] [2020-12-22 09:34:02,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:03,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271319628] [2020-12-22 09:34:03,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009636042] [2020-12-22 09:34:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:03,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:34:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:04,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:34:04,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:04,768 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:34:04,774 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:34:05,328 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 47 [2020-12-22 09:34:05,724 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:05,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:05,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 33 [2020-12-22 09:34:05,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847652551] [2020-12-22 09:34:05,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 09:34:05,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:05,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 09:34:05,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:34:05,892 INFO L87 Difference]: Start difference. First operand 7798 states and 10621 transitions. Second operand 33 states. [2020-12-22 09:34:07,360 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-12-22 09:34:07,620 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:07,901 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 09:34:08,225 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-22 09:34:08,541 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:10,710 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:34:11,057 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:34:11,242 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:34:11,551 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:34:11,688 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-22 09:34:12,495 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-12-22 09:34:12,742 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-22 09:34:13,102 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 09:34:13,408 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 09:34:13,779 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2020-12-22 09:34:14,663 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-12-22 09:34:14,816 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-12-22 09:34:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:15,115 INFO L93 Difference]: Finished difference Result 13043 states and 17165 transitions. [2020-12-22 09:34:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:34:15,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-12-22 09:34:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:15,123 INFO L225 Difference]: With dead ends: 13043 [2020-12-22 09:34:15,123 INFO L226 Difference]: Without dead ends: 9291 [2020-12-22 09:34:15,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1695, Invalid=9225, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 09:34:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9291 states. [2020-12-22 09:34:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9291 to 6973. [2020-12-22 09:34:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6973 states. [2020-12-22 09:34:15,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6973 states to 6973 states and 9626 transitions. [2020-12-22 09:34:15,700 INFO L78 Accepts]: Start accepts. Automaton has 6973 states and 9626 transitions. Word has length 67 [2020-12-22 09:34:15,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:15,700 INFO L481 AbstractCegarLoop]: Abstraction has 6973 states and 9626 transitions. [2020-12-22 09:34:15,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 09:34:15,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6973 states and 9626 transitions. [2020-12-22 09:34:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:34:15,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:15,701 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:15,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:34:15,916 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:15,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:34:15,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:15,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147877445] [2020-12-22 09:34:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:16,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147877445] [2020-12-22 09:34:16,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195116304] [2020-12-22 09:34:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:16,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:34:16,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:16,642 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:17,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:17,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:34:17,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889332211] [2020-12-22 09:34:17,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:34:17,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:17,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:34:17,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:34:17,106 INFO L87 Difference]: Start difference. First operand 6973 states and 9626 transitions. Second operand 22 states. [2020-12-22 09:34:17,478 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:17,617 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:18,347 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:34:18,563 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:34:18,701 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:34:18,905 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:34:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:19,836 INFO L93 Difference]: Finished difference Result 11980 states and 16044 transitions. [2020-12-22 09:34:19,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:34:19,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:34:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:19,846 INFO L225 Difference]: With dead ends: 11980 [2020-12-22 09:34:19,847 INFO L226 Difference]: Without dead ends: 9386 [2020-12-22 09:34:19,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:34:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9386 states. [2020-12-22 09:34:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9386 to 6548. [2020-12-22 09:34:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6548 states. [2020-12-22 09:34:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6548 states to 6548 states and 9127 transitions. [2020-12-22 09:34:20,350 INFO L78 Accepts]: Start accepts. Automaton has 6548 states and 9127 transitions. Word has length 67 [2020-12-22 09:34:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:20,351 INFO L481 AbstractCegarLoop]: Abstraction has 6548 states and 9127 transitions. [2020-12-22 09:34:20,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:34:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 6548 states and 9127 transitions. [2020-12-22 09:34:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:34:20,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:20,352 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 09:34:20,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:20,566 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:34:20,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:20,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746636627] [2020-12-22 09:34:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:21,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746636627] [2020-12-22 09:34:21,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266762234] [2020-12-22 09:34:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 09:34:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:22,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:22,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:22,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:34:22,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580237699] [2020-12-22 09:34:22,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:34:22,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:22,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:34:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:34:22,698 INFO L87 Difference]: Start difference. First operand 6548 states and 9127 transitions. Second operand 32 states. [2020-12-22 09:34:23,736 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 09:34:24,096 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:34:25,160 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-12-22 09:34:26,422 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:34:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:26,996 INFO L93 Difference]: Finished difference Result 9942 states and 13496 transitions. [2020-12-22 09:34:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 09:34:26,997 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:34:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:27,007 INFO L225 Difference]: With dead ends: 9942 [2020-12-22 09:34:27,007 INFO L226 Difference]: Without dead ends: 7063 [2020-12-22 09:34:27,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=804, Invalid=3102, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 09:34:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7063 states. [2020-12-22 09:34:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7063 to 4541. [2020-12-22 09:34:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4541 states. [2020-12-22 09:34:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 6657 transitions. [2020-12-22 09:34:27,382 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 6657 transitions. Word has length 68 [2020-12-22 09:34:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:27,382 INFO L481 AbstractCegarLoop]: Abstraction has 4541 states and 6657 transitions. [2020-12-22 09:34:27,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:34:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 6657 transitions. [2020-12-22 09:34:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:34:27,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:27,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:34:27,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:34:27,587 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:27,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:34:27,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:27,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672099457] [2020-12-22 09:34:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:27,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672099457] [2020-12-22 09:34:27,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990161179] [2020-12-22 09:34:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:28,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:34:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:28,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:34:28,414 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:28,502 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:28,538 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:34:28,617 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:34:29,310 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 58 [2020-12-22 09:34:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:30,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:30,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-22 09:34:30,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474781441] [2020-12-22 09:34:30,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:34:30,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:30,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:34:30,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:34:30,649 INFO L87 Difference]: Start difference. First operand 4541 states and 6657 transitions. Second operand 22 states. [2020-12-22 09:34:33,517 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:35,891 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:34:36,063 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:36,203 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:36,605 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 09:34:36,823 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:36,988 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-22 09:34:37,218 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:34:37,518 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 105 [2020-12-22 09:34:37,744 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-22 09:34:37,915 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:34:38,125 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:38,285 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 09:34:38,472 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:38,623 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:38,857 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:39,044 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:39,194 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-22 09:34:39,719 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:39,961 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:34:40,193 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:40,478 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 09:34:40,687 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:40,980 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:41,247 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:34:41,411 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-12-22 09:34:46,177 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 100 [2020-12-22 09:34:46,396 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-12-22 09:34:46,813 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 94 [2020-12-22 09:34:47,123 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-12-22 09:34:48,370 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2020-12-22 09:34:49,294 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 106 [2020-12-22 09:34:50,956 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2020-12-22 09:34:51,308 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 103 [2020-12-22 09:34:52,245 WARN L197 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 116 [2020-12-22 09:34:52,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:34:52,725 INFO L93 Difference]: Finished difference Result 9357 states and 12831 transitions. [2020-12-22 09:34:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 09:34:52,726 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 110 [2020-12-22 09:34:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:34:52,734 INFO L225 Difference]: With dead ends: 9357 [2020-12-22 09:34:52,734 INFO L226 Difference]: Without dead ends: 6593 [2020-12-22 09:34:52,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1023, Invalid=3399, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 09:34:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2020-12-22 09:34:53,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 5047. [2020-12-22 09:34:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5047 states. [2020-12-22 09:34:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5047 states to 5047 states and 7180 transitions. [2020-12-22 09:34:53,391 INFO L78 Accepts]: Start accepts. Automaton has 5047 states and 7180 transitions. Word has length 110 [2020-12-22 09:34:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:34:53,391 INFO L481 AbstractCegarLoop]: Abstraction has 5047 states and 7180 transitions. [2020-12-22 09:34:53,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:34:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 5047 states and 7180 transitions. [2020-12-22 09:34:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:34:53,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:34:53,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:34:53,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:34:53,595 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:34:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:34:53,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1600436991, now seen corresponding path program 1 times [2020-12-22 09:34:53,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:34:53,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688507589] [2020-12-22 09:34:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:34:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 60 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 09:34:54,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688507589] [2020-12-22 09:34:54,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536075407] [2020-12-22 09:34:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:34:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:34:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 09:34:54,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:34:55,043 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:34:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:34:55,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:34:55,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 30 [2020-12-22 09:34:55,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750973052] [2020-12-22 09:34:55,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:34:55,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:34:55,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:34:55,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:34:55,686 INFO L87 Difference]: Start difference. First operand 5047 states and 7180 transitions. Second operand 30 states. [2020-12-22 09:34:55,978 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:34:56,796 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:34:57,039 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:34:57,442 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:34:57,648 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:34:57,856 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:34:58,094 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:34:58,320 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 09:34:58,622 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:34:58,939 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-12-22 09:34:59,255 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-12-22 09:34:59,575 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-22 09:34:59,901 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-12-22 09:35:00,267 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:35:00,558 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-12-22 09:35:00,867 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:35:01,130 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:01,538 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:35:01,877 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:02,229 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:35:02,639 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:03,082 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:35:03,381 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:03,761 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:35:04,107 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:35:04,341 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:35:04,583 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:35:04,779 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 09:35:05,929 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:06,226 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:06,696 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:35:07,077 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:35:07,302 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:35:07,742 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:08,080 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:08,296 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:35:08,841 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:09,199 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:11,029 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:35:11,850 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:35:12,423 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:35:12,723 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-12-22 09:35:13,136 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:13,675 WARN L197 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:35:14,266 INFO L93 Difference]: Finished difference Result 8629 states and 11700 transitions. [2020-12-22 09:35:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 09:35:14,267 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:35:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:35:14,274 INFO L225 Difference]: With dead ends: 8629 [2020-12-22 09:35:14,274 INFO L226 Difference]: Without dead ends: 6596 [2020-12-22 09:35:14,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=940, Invalid=5380, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 09:35:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2020-12-22 09:35:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 5020. [2020-12-22 09:35:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5020 states. [2020-12-22 09:35:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5020 states to 5020 states and 7120 transitions. [2020-12-22 09:35:14,989 INFO L78 Accepts]: Start accepts. Automaton has 5020 states and 7120 transitions. Word has length 111 [2020-12-22 09:35:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:35:14,990 INFO L481 AbstractCegarLoop]: Abstraction has 5020 states and 7120 transitions. [2020-12-22 09:35:14,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:35:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5020 states and 7120 transitions. [2020-12-22 09:35:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:35:14,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:35:14,992 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:35:15,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:35:15,207 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:35:15,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:35:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1933874233, now seen corresponding path program 1 times [2020-12-22 09:35:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:35:15,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286161263] [2020-12-22 09:35:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:35:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 33 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:16,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286161263] [2020-12-22 09:35:16,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886760970] [2020-12-22 09:35:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:35:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:35:16,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:35:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:35:17,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:35:17,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:17,301 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:17,302 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:35:17,825 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:35:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 27 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:35:18,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:35:18,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 34 [2020-12-22 09:35:18,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342409563] [2020-12-22 09:35:18,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 09:35:18,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:35:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 09:35:18,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 09:35:18,309 INFO L87 Difference]: Start difference. First operand 5020 states and 7120 transitions. Second operand 34 states. [2020-12-22 09:35:18,872 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 98 [2020-12-22 09:35:19,111 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:19,363 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:35:19,607 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:35:19,831 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:35:20,228 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:35:20,634 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-12-22 09:35:21,257 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-12-22 09:35:21,705 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2020-12-22 09:35:22,175 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-12-22 09:35:22,553 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-12-22 09:35:23,044 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-22 09:35:23,494 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-12-22 09:35:23,905 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-12-22 09:35:24,297 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2020-12-22 09:35:24,756 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-12-22 09:35:25,184 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-12-22 09:35:25,592 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-12-22 09:35:26,045 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2020-12-22 09:35:26,496 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-12-22 09:35:26,878 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-12-22 09:35:27,312 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-12-22 09:35:27,742 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:35:28,202 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:35:28,566 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-12-22 09:35:29,046 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-12-22 09:35:29,390 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:35:29,712 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:30,120 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-12-22 09:35:30,556 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-12-22 09:35:30,918 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-22 09:35:31,488 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-22 09:35:31,928 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-22 09:35:32,427 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:32,753 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:35:33,115 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-22 09:35:33,462 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-22 09:35:33,827 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-22 09:35:34,151 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-12-22 09:35:34,483 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:35:34,840 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-12-22 09:35:35,169 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-12-22 09:35:35,528 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-12-22 09:35:36,049 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2020-12-22 09:35:36,358 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-22 09:35:36,888 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 97 [2020-12-22 09:35:37,239 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-12-22 09:35:37,643 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-12-22 09:35:38,209 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-12-22 09:35:38,672 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-12-22 09:35:38,972 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-12-22 09:35:39,722 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-12-22 09:35:40,024 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-12-22 09:35:40,629 WARN L197 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-12-22 09:35:40,965 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-12-22 09:35:41,195 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-22 09:35:41,671 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:35:42,248 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-12-22 09:35:42,511 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-12-22 09:35:42,732 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:35:43,544 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:35:43,784 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:35:44,281 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-12-22 09:35:44,481 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:35:44,731 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:35:45,397 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:35:45,869 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:35:46,309 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 09:35:46,544 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:35:46,986 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 09:35:47,335 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:35:47,610 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:48,348 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 09:35:48,837 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:35:49,655 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-12-22 09:35:49,984 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:35:50,812 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 09:35:51,177 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:35:53,024 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:35:54,755 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:35:55,208 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:35:56,127 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:35:56,602 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:35:56,980 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:35:57,556 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-22 09:35:58,144 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:35:58,515 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:35:58,726 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:35:59,448 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:36:00,051 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-22 09:36:00,396 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-22 09:36:01,130 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 09:36:01,893 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-12-22 09:36:02,235 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 09:36:02,531 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:36:03,175 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 09:36:03,535 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 09:36:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:36:04,321 INFO L93 Difference]: Finished difference Result 13007 states and 17101 transitions. [2020-12-22 09:36:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:36:04,321 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 112 [2020-12-22 09:36:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:36:04,330 INFO L225 Difference]: With dead ends: 13007 [2020-12-22 09:36:04,330 INFO L226 Difference]: Without dead ends: 9765 [2020-12-22 09:36:04,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=3020, Invalid=18442, Unknown=0, NotChecked=0, Total=21462 [2020-12-22 09:36:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9765 states. [2020-12-22 09:36:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 5439. [2020-12-22 09:36:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5439 states. [2020-12-22 09:36:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 7634 transitions. [2020-12-22 09:36:05,412 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 7634 transitions. Word has length 112 [2020-12-22 09:36:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:36:05,413 INFO L481 AbstractCegarLoop]: Abstraction has 5439 states and 7634 transitions. [2020-12-22 09:36:05,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 09:36:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 7634 transitions. [2020-12-22 09:36:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 09:36:05,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:36:05,416 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 09:36:05,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:36:05,631 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:36:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:36:05,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1117709487, now seen corresponding path program 1 times [2020-12-22 09:36:05,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:36:05,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473303911] [2020-12-22 09:36:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:36:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:36:06,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473303911] [2020-12-22 09:36:06,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871189290] [2020-12-22 09:36:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:36:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:36:06,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 09:36:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:36:08,401 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-12-22 09:36:08,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:36:09,933 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 25 [2020-12-22 09:36:10,612 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:36:10,698 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:11,058 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:11,501 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:12,169 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:12,830 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:13,933 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:14,656 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:15,141 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:15,310 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:15,675 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:16,239 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:17,239 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:18,145 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:18,814 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:19,331 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:19,678 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:36:20,382 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:36:35,207 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 395 DAG size of output: 228 [2020-12-22 09:36:43,493 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-22 09:36:43,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-12-22 09:36:43,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:36:43,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-22 09:36:43,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047189481] [2020-12-22 09:36:43,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:36:43,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:36:43,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:36:43,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:36:43,497 INFO L87 Difference]: Start difference. First operand 5439 states and 7634 transitions. Second operand 18 states. [2020-12-22 09:36:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:36:43,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:36:43,700 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@59958ac9 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-22 09:36:43,705 INFO L168 Benchmark]: Toolchain (without parser) took 205693.89 ms. Allocated memory was 154.1 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 114.3 MB in the beginning and 1.3 GB in the end (delta: -1.2 GB). Peak memory consumption was 993.4 MB. Max. memory is 8.0 GB. [2020-12-22 09:36:43,706 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 154.1 MB. Free memory was 128.1 MB in the beginning and 128.0 MB in the end (delta: 81.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 09:36:43,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2433.73 ms. Allocated memory was 154.1 MB in the beginning and 199.2 MB in the end (delta: 45.1 MB). Free memory was 113.9 MB in the beginning and 123.2 MB in the end (delta: -9.3 MB). Peak memory consumption was 95.9 MB. Max. memory is 8.0 GB. [2020-12-22 09:36:43,706 INFO L168 Benchmark]: Boogie Procedure Inliner took 434.44 ms. Allocated memory is still 199.2 MB. Free memory was 123.2 MB in the beginning and 92.8 MB in the end (delta: 30.4 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. [2020-12-22 09:36:43,707 INFO L168 Benchmark]: Boogie Preprocessor took 564.49 ms. Allocated memory was 199.2 MB in the beginning and 394.3 MB in the end (delta: 195.0 MB). Free memory was 92.8 MB in the beginning and 277.3 MB in the end (delta: -184.6 MB). Peak memory consumption was 63.4 MB. Max. memory is 8.0 GB. [2020-12-22 09:36:43,707 INFO L168 Benchmark]: RCFGBuilder took 4754.74 ms. Allocated memory was 394.3 MB in the beginning and 578.8 MB in the end (delta: 184.5 MB). Free memory was 277.3 MB in the beginning and 284.2 MB in the end (delta: -6.8 MB). Peak memory consumption was 177.7 MB. Max. memory is 8.0 GB. [2020-12-22 09:36:43,708 INFO L168 Benchmark]: TraceAbstraction took 197497.27 ms. Allocated memory was 578.8 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 283.6 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 737.0 MB. Max. memory is 8.0 GB. [2020-12-22 09:36:43,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 154.1 MB. Free memory was 128.1 MB in the beginning and 128.0 MB in the end (delta: 81.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 2433.73 ms. Allocated memory was 154.1 MB in the beginning and 199.2 MB in the end (delta: 45.1 MB). Free memory was 113.9 MB in the beginning and 123.2 MB in the end (delta: -9.3 MB). Peak memory consumption was 95.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 434.44 ms. Allocated memory is still 199.2 MB. Free memory was 123.2 MB in the beginning and 92.8 MB in the end (delta: 30.4 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 564.49 ms. Allocated memory was 199.2 MB in the beginning and 394.3 MB in the end (delta: 195.0 MB). Free memory was 92.8 MB in the beginning and 277.3 MB in the end (delta: -184.6 MB). Peak memory consumption was 63.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 4754.74 ms. Allocated memory was 394.3 MB in the beginning and 578.8 MB in the end (delta: 184.5 MB). Free memory was 277.3 MB in the beginning and 284.2 MB in the end (delta: -6.8 MB). Peak memory consumption was 177.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 197497.27 ms. Allocated memory was 578.8 MB in the beginning and 2.3 GB in the end (delta: 1.8 GB). Free memory was 283.6 MB in the beginning and 1.3 GB in the end (delta: -1.0 GB). Peak memory consumption was 737.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@59958ac9 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@59958ac9: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...