/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.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:52:11,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:52:11,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:52:11,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:52:11,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:52:11,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:52:11,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:52:11,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:52:11,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:52:11,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:52:11,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:52:11,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:52:11,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:52:11,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:52:11,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:52:11,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:52:11,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:52:11,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:52:11,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:52:11,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:52:11,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:52:11,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:52:11,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:52:11,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:52:11,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:52:11,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:52:11,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:52:11,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:52:11,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:52:11,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:52:11,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:52:11,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:52:11,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:52:11,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:52:11,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:52:11,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:52:11,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:52:11,916 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:52:11,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:52:11,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:52:11,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:52:11,918 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:52:11,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:52:11,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:52:11,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:52:11,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:52:11,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:52:11,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:52:11,920 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:52:11,920 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:52:11,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:52:11,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:52:11,921 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:52:11,921 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:52:11,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:52:11,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:52:11,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:52:11,922 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:52:11,922 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:52:11,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:52:11,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:52:11,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:52:11,923 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:52:12,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:52:12,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:52:12,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:52:12,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:52:12,352 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:52:12,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:52:12,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3b9966a/48eaea4bd3ec4185b98dbb8894add00e/FLAG5e1fa878d [2020-12-22 09:52:13,468 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:52:13,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:52:13,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3b9966a/48eaea4bd3ec4185b98dbb8894add00e/FLAG5e1fa878d [2020-12-22 09:52:13,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe3b9966a/48eaea4bd3ec4185b98dbb8894add00e [2020-12-22 09:52:13,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:52:13,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:52:13,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:13,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:52:13,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:52:13,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:13" (1/1) ... [2020-12-22 09:52:13,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee9cb44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:13, skipping insertion in model container [2020-12-22 09:52:13,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:13" (1/1) ... [2020-12-22 09:52:13,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:52:14,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:52:14,654 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.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c[11795,11808] [2020-12-22 09:52:14,747 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.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c[17107,17120] [2020-12-22 09:52:15,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:15,623 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:52:15,733 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.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c[11795,11808] [2020-12-22 09:52:15,765 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.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c[17107,17120] [2020-12-22 09:52:16,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:16,584 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:52:16,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16 WrapperNode [2020-12-22 09:52:16,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:16,586 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:16,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:52:16,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:52:16,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:16,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:17,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:17,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:52:17,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:52:17,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:52:17,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:17,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:17,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:17,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:17,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:17,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:17,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (1/1) ... [2020-12-22 09:52:17,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:52:17,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:52:17,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:52:17,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:52:17,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (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 09:52:17,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:52:17,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:52:17,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:52:17,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:52:23,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:52:23,833 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:52:23,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:23 BoogieIcfgContainer [2020-12-22 09:52:23,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:52:23,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:52:23,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:52:23,844 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:52:23,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:52:13" (1/3) ... [2020-12-22 09:52:23,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20403b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:23, skipping insertion in model container [2020-12-22 09:52:23,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:16" (2/3) ... [2020-12-22 09:52:23,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20403b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:23, skipping insertion in model container [2020-12-22 09:52:23,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:23" (3/3) ... [2020-12-22 09:52:23,848 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label01.c [2020-12-22 09:52:23,857 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:52:23,864 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:52:23,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:52:23,926 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:52:23,927 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:52:23,927 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:52:23,927 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:52:23,927 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:52:23,928 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:52:23,928 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:52:23,928 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:52:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-12-22 09:52:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:23,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:23,980 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] [2020-12-22 09:52:23,981 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:23,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:23,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2020-12-22 09:52:24,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:24,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002709750] [2020-12-22 09:52:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:24,324 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 09:52:24,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002709750] [2020-12-22 09:52:24,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:24,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:24,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73277159] [2020-12-22 09:52:24,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:52:24,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:24,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:52:24,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:52:24,361 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 2 states. [2020-12-22 09:52:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:24,469 INFO L93 Difference]: Finished difference Result 1781 states and 3376 transitions. [2020-12-22 09:52:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:52:24,471 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:52:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:24,502 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:52:24,502 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:52:24,512 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 09:52:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:52:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:52:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:52:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1591 transitions. [2020-12-22 09:52:24,627 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1591 transitions. Word has length 34 [2020-12-22 09:52:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:24,627 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1591 transitions. [2020-12-22 09:52:24,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:52:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1591 transitions. [2020-12-22 09:52:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:24,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:24,630 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] [2020-12-22 09:52:24,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:52:24,631 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2020-12-22 09:52:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:24,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362683643] [2020-12-22 09:52:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:24,794 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 09:52:24,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362683643] [2020-12-22 09:52:24,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:24,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607651469] [2020-12-22 09:52:24,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:24,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:24,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:24,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:24,802 INFO L87 Difference]: Start difference. First operand 844 states and 1591 transitions. Second operand 5 states. [2020-12-22 09:52:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:25,138 INFO L93 Difference]: Finished difference Result 901 states and 1679 transitions. [2020-12-22 09:52:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:52:25,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:52:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:25,148 INFO L225 Difference]: With dead ends: 901 [2020-12-22 09:52:25,149 INFO L226 Difference]: Without dead ends: 844 [2020-12-22 09:52:25,151 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 09:52:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-22 09:52:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2020-12-22 09:52:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 09:52:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1560 transitions. [2020-12-22 09:52:25,203 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1560 transitions. Word has length 34 [2020-12-22 09:52:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:25,204 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1560 transitions. [2020-12-22 09:52:25,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1560 transitions. [2020-12-22 09:52:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 09:52:25,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:25,212 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 09:52:25,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:52:25,214 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash 229544309, now seen corresponding path program 1 times [2020-12-22 09:52:25,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:25,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964115475] [2020-12-22 09:52:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:25,436 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 09:52:25,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964115475] [2020-12-22 09:52:25,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:25,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921429039] [2020-12-22 09:52:25,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:25,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:25,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:25,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:25,440 INFO L87 Difference]: Start difference. First operand 844 states and 1560 transitions. Second operand 3 states. [2020-12-22 09:52:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:31,941 INFO L93 Difference]: Finished difference Result 2348 states and 4433 transitions. [2020-12-22 09:52:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:31,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 09:52:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:31,954 INFO L225 Difference]: With dead ends: 2348 [2020-12-22 09:52:31,954 INFO L226 Difference]: Without dead ends: 1595 [2020-12-22 09:52:31,957 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 09:52:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2020-12-22 09:52:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1595. [2020-12-22 09:52:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1595 states. [2020-12-22 09:52:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2935 transitions. [2020-12-22 09:52:32,011 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2935 transitions. Word has length 48 [2020-12-22 09:52:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:32,011 INFO L481 AbstractCegarLoop]: Abstraction has 1595 states and 2935 transitions. [2020-12-22 09:52:32,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2935 transitions. [2020-12-22 09:52:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:32,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:32,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:32,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:52:32,014 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2020-12-22 09:52:32,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:32,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225815476] [2020-12-22 09:52:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:32,115 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 09:52:32,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225815476] [2020-12-22 09:52:32,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:32,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:32,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646577988] [2020-12-22 09:52:32,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:32,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:32,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:32,120 INFO L87 Difference]: Start difference. First operand 1595 states and 2935 transitions. Second operand 3 states. [2020-12-22 09:52:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:32,165 INFO L93 Difference]: Finished difference Result 1695 states and 3093 transitions. [2020-12-22 09:52:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:32,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:32,177 INFO L225 Difference]: With dead ends: 1695 [2020-12-22 09:52:32,178 INFO L226 Difference]: Without dead ends: 1642 [2020-12-22 09:52:32,179 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 09:52:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-12-22 09:52:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1640. [2020-12-22 09:52:32,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-22 09:52:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 3007 transitions. [2020-12-22 09:52:32,234 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 3007 transitions. Word has length 64 [2020-12-22 09:52:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:32,237 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 3007 transitions. [2020-12-22 09:52:32,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 3007 transitions. [2020-12-22 09:52:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:32,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:32,239 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:32,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:52:32,240 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:32,241 INFO L82 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2020-12-22 09:52:32,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:32,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792825777] [2020-12-22 09:52:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:32,491 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 09:52:32,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792825777] [2020-12-22 09:52:32,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:32,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:32,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794358537] [2020-12-22 09:52:32,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:32,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:32,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:32,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:32,496 INFO L87 Difference]: Start difference. First operand 1640 states and 3007 transitions. Second operand 7 states. [2020-12-22 09:52:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:32,868 INFO L93 Difference]: Finished difference Result 2620 states and 4567 transitions. [2020-12-22 09:52:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:52:32,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:52:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:32,887 INFO L225 Difference]: With dead ends: 2620 [2020-12-22 09:52:32,888 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:52:32,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:52:32,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:52:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 1736. [2020-12-22 09:52:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-12-22 09:52:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 3158 transitions. [2020-12-22 09:52:32,973 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 3158 transitions. Word has length 64 [2020-12-22 09:52:32,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:32,976 INFO L481 AbstractCegarLoop]: Abstraction has 1736 states and 3158 transitions. [2020-12-22 09:52:32,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 3158 transitions. [2020-12-22 09:52:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:32,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:32,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:32,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:52:32,980 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2020-12-22 09:52:32,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:32,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366145965] [2020-12-22 09:52:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:33,127 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 09:52:33,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366145965] [2020-12-22 09:52:33,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:33,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:33,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695692689] [2020-12-22 09:52:33,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:33,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:33,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:33,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:33,130 INFO L87 Difference]: Start difference. First operand 1736 states and 3158 transitions. Second operand 3 states. [2020-12-22 09:52:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:33,198 INFO L93 Difference]: Finished difference Result 2102 states and 3734 transitions. [2020-12-22 09:52:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:33,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:52:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:33,212 INFO L225 Difference]: With dead ends: 2102 [2020-12-22 09:52:33,213 INFO L226 Difference]: Without dead ends: 1908 [2020-12-22 09:52:33,214 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 09:52:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2020-12-22 09:52:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1902. [2020-12-22 09:52:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:52:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3412 transitions. [2020-12-22 09:52:33,298 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3412 transitions. Word has length 66 [2020-12-22 09:52:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:33,299 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3412 transitions. [2020-12-22 09:52:33,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3412 transitions. [2020-12-22 09:52:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:33,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:33,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:33,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:52:33,301 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2020-12-22 09:52:33,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:33,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787527377] [2020-12-22 09:52:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:33,551 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 09:52:33,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787527377] [2020-12-22 09:52:33,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:33,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:33,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396787418] [2020-12-22 09:52:33,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:33,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:33,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:33,561 INFO L87 Difference]: Start difference. First operand 1902 states and 3412 transitions. Second operand 7 states. [2020-12-22 09:52:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:33,801 INFO L93 Difference]: Finished difference Result 2264 states and 3974 transitions. [2020-12-22 09:52:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:33,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:52:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:33,815 INFO L225 Difference]: With dead ends: 2264 [2020-12-22 09:52:33,815 INFO L226 Difference]: Without dead ends: 1904 [2020-12-22 09:52:33,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:52:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-12-22 09:52:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1902. [2020-12-22 09:52:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-12-22 09:52:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 3408 transitions. [2020-12-22 09:52:33,892 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 3408 transitions. Word has length 66 [2020-12-22 09:52:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:33,893 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 3408 transitions. [2020-12-22 09:52:33,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 3408 transitions. [2020-12-22 09:52:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:33,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:33,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:33,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:52:33,895 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:33,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2020-12-22 09:52:33,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:33,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108498702] [2020-12-22 09:52:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:33,982 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 09:52:33,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108498702] [2020-12-22 09:52:33,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:33,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:33,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183872193] [2020-12-22 09:52:33,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:33,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:33,985 INFO L87 Difference]: Start difference. First operand 1902 states and 3408 transitions. Second operand 3 states. [2020-12-22 09:52:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:34,046 INFO L93 Difference]: Finished difference Result 2574 states and 4442 transitions. [2020-12-22 09:52:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:34,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:52:34,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:34,059 INFO L225 Difference]: With dead ends: 2574 [2020-12-22 09:52:34,060 INFO L226 Difference]: Without dead ends: 2214 [2020-12-22 09:52:34,062 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 09:52:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2020-12-22 09:52:34,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2212. [2020-12-22 09:52:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2020-12-22 09:52:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3876 transitions. [2020-12-22 09:52:34,146 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3876 transitions. Word has length 66 [2020-12-22 09:52:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:34,146 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 3876 transitions. [2020-12-22 09:52:34,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3876 transitions. [2020-12-22 09:52:34,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:34,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:34,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:34,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:52:34,148 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:34,148 INFO L82 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2020-12-22 09:52:34,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:34,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942063668] [2020-12-22 09:52:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:34,218 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 09:52:34,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942063668] [2020-12-22 09:52:34,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:34,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:34,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967835027] [2020-12-22 09:52:34,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:34,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:34,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:34,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:34,222 INFO L87 Difference]: Start difference. First operand 2212 states and 3876 transitions. Second operand 3 states. [2020-12-22 09:52:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:34,307 INFO L93 Difference]: Finished difference Result 3456 states and 5766 transitions. [2020-12-22 09:52:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:34,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:52:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:34,323 INFO L225 Difference]: With dead ends: 3456 [2020-12-22 09:52:34,323 INFO L226 Difference]: Without dead ends: 2786 [2020-12-22 09:52:34,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2020-12-22 09:52:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2784. [2020-12-22 09:52:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2784 states. [2020-12-22 09:52:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 4724 transitions. [2020-12-22 09:52:34,460 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 4724 transitions. Word has length 66 [2020-12-22 09:52:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:34,460 INFO L481 AbstractCegarLoop]: Abstraction has 2784 states and 4724 transitions. [2020-12-22 09:52:34,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 4724 transitions. [2020-12-22 09:52:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:34,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:34,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:34,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:52:34,468 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2020-12-22 09:52:34,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:34,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782392565] [2020-12-22 09:52:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:34,534 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 09:52:34,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782392565] [2020-12-22 09:52:34,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:34,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:34,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355369600] [2020-12-22 09:52:34,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:34,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:34,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:34,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:34,540 INFO L87 Difference]: Start difference. First operand 2784 states and 4724 transitions. Second operand 3 states. [2020-12-22 09:52:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:34,680 INFO L93 Difference]: Finished difference Result 5076 states and 8150 transitions. [2020-12-22 09:52:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:34,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:52:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:34,705 INFO L225 Difference]: With dead ends: 5076 [2020-12-22 09:52:34,705 INFO L226 Difference]: Without dead ends: 3834 [2020-12-22 09:52:34,709 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 09:52:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2020-12-22 09:52:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3832. [2020-12-22 09:52:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3832 states. [2020-12-22 09:52:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 6244 transitions. [2020-12-22 09:52:34,889 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 6244 transitions. Word has length 66 [2020-12-22 09:52:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:34,890 INFO L481 AbstractCegarLoop]: Abstraction has 3832 states and 6244 transitions. [2020-12-22 09:52:34,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 6244 transitions. [2020-12-22 09:52:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:34,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:34,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:34,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:52:34,892 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:34,892 INFO L82 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2020-12-22 09:52:34,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:34,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765844116] [2020-12-22 09:52:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:34,973 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 09:52:34,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765844116] [2020-12-22 09:52:34,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:34,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:34,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408595814] [2020-12-22 09:52:34,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:34,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:34,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:34,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:34,976 INFO L87 Difference]: Start difference. First operand 3832 states and 6244 transitions. Second operand 5 states. [2020-12-22 09:52:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:35,260 INFO L93 Difference]: Finished difference Result 5558 states and 8746 transitions. [2020-12-22 09:52:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:35,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:52:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:35,292 INFO L225 Difference]: With dead ends: 5558 [2020-12-22 09:52:35,292 INFO L226 Difference]: Without dead ends: 5556 [2020-12-22 09:52:35,296 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 09:52:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2020-12-22 09:52:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 3928. [2020-12-22 09:52:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-12-22 09:52:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6324 transitions. [2020-12-22 09:52:35,650 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6324 transitions. Word has length 67 [2020-12-22 09:52:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:35,651 INFO L481 AbstractCegarLoop]: Abstraction has 3928 states and 6324 transitions. [2020-12-22 09:52:35,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6324 transitions. [2020-12-22 09:52:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:52:35,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:35,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:35,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:52:35,653 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2020-12-22 09:52:35,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:35,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835333751] [2020-12-22 09:52:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:35,712 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 09:52:35,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835333751] [2020-12-22 09:52:35,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:35,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:35,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755529597] [2020-12-22 09:52:35,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:35,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:35,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:35,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:35,715 INFO L87 Difference]: Start difference. First operand 3928 states and 6324 transitions. Second operand 3 states. [2020-12-22 09:52:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:36,014 INFO L93 Difference]: Finished difference Result 6367 states and 9914 transitions. [2020-12-22 09:52:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:36,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 09:52:36,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:36,029 INFO L225 Difference]: With dead ends: 6367 [2020-12-22 09:52:36,029 INFO L226 Difference]: Without dead ends: 5020 [2020-12-22 09:52:36,035 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 09:52:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5020 states. [2020-12-22 09:52:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5020 to 5018. [2020-12-22 09:52:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:52:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7878 transitions. [2020-12-22 09:52:36,412 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7878 transitions. Word has length 68 [2020-12-22 09:52:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:36,413 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7878 transitions. [2020-12-22 09:52:36,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7878 transitions. [2020-12-22 09:52:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:52:36,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:36,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:52:36,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:52:36,418 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 320828100, now seen corresponding path program 1 times [2020-12-22 09:52:36,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:36,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254753848] [2020-12-22 09:52:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:52:36,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254753848] [2020-12-22 09:52:36,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:36,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:36,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721516374] [2020-12-22 09:52:36,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:36,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:36,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:36,574 INFO L87 Difference]: Start difference. First operand 5018 states and 7878 transitions. Second operand 7 states. [2020-12-22 09:52:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:37,803 INFO L93 Difference]: Finished difference Result 23094 states and 33980 transitions. [2020-12-22 09:52:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:37,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:52:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:37,850 INFO L225 Difference]: With dead ends: 23094 [2020-12-22 09:52:37,850 INFO L226 Difference]: Without dead ends: 19620 [2020-12-22 09:52:37,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2020-12-22 09:52:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2020-12-22 09:52:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8490 states. [2020-12-22 09:52:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12854 transitions. [2020-12-22 09:52:38,478 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12854 transitions. Word has length 94 [2020-12-22 09:52:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:38,478 INFO L481 AbstractCegarLoop]: Abstraction has 8490 states and 12854 transitions. [2020-12-22 09:52:38,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:38,480 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12854 transitions. [2020-12-22 09:52:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:52:38,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:38,484 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:38,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:52:38,485 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:38,485 INFO L82 PathProgramCache]: Analyzing trace with hash 350350318, now seen corresponding path program 1 times [2020-12-22 09:52:38,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:38,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958197459] [2020-12-22 09:52:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:52:38,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958197459] [2020-12-22 09:52:38,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:38,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:38,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529442226] [2020-12-22 09:52:38,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:38,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:38,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:38,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:38,611 INFO L87 Difference]: Start difference. First operand 8490 states and 12854 transitions. Second operand 7 states. [2020-12-22 09:52:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:39,838 INFO L93 Difference]: Finished difference Result 26566 states and 38956 transitions. [2020-12-22 09:52:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:39,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:52:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:39,887 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 09:52:39,887 INFO L226 Difference]: Without dead ends: 23092 [2020-12-22 09:52:39,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2020-12-22 09:52:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2020-12-22 09:52:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13706 states. [2020-12-22 09:52:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 20278 transitions. [2020-12-22 09:52:40,710 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 20278 transitions. Word has length 94 [2020-12-22 09:52:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:40,711 INFO L481 AbstractCegarLoop]: Abstraction has 13706 states and 20278 transitions. [2020-12-22 09:52:40,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 20278 transitions. [2020-12-22 09:52:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:52:40,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:40,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:40,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:52:40,716 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash 624038030, now seen corresponding path program 1 times [2020-12-22 09:52:40,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:40,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429961990] [2020-12-22 09:52:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:52:40,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429961990] [2020-12-22 09:52:40,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:40,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:40,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000902957] [2020-12-22 09:52:40,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:40,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:40,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:40,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:40,846 INFO L87 Difference]: Start difference. First operand 13706 states and 20278 transitions. Second operand 7 states. [2020-12-22 09:52:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:42,090 INFO L93 Difference]: Finished difference Result 30038 states and 43932 transitions. [2020-12-22 09:52:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:42,091 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:52:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:42,144 INFO L225 Difference]: With dead ends: 30038 [2020-12-22 09:52:42,144 INFO L226 Difference]: Without dead ends: 26564 [2020-12-22 09:52:42,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2020-12-22 09:52:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2020-12-22 09:52:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17178 states. [2020-12-22 09:52:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 25254 transitions. [2020-12-22 09:52:43,338 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 25254 transitions. Word has length 94 [2020-12-22 09:52:43,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:43,339 INFO L481 AbstractCegarLoop]: Abstraction has 17178 states and 25254 transitions. [2020-12-22 09:52:43,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 25254 transitions. [2020-12-22 09:52:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 09:52:43,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:43,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:43,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:52:43,346 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:43,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1851857618, now seen corresponding path program 1 times [2020-12-22 09:52:43,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:43,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082170920] [2020-12-22 09:52:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:52:43,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082170920] [2020-12-22 09:52:43,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:43,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:43,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275867270] [2020-12-22 09:52:43,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:43,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:43,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:43,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:43,488 INFO L87 Difference]: Start difference. First operand 17178 states and 25254 transitions. Second operand 7 states. [2020-12-22 09:52:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:44,947 INFO L93 Difference]: Finished difference Result 33510 states and 48908 transitions. [2020-12-22 09:52:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:44,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-12-22 09:52:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:45,007 INFO L225 Difference]: With dead ends: 33510 [2020-12-22 09:52:45,008 INFO L226 Difference]: Without dead ends: 30036 [2020-12-22 09:52:45,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:45,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-12-22 09:52:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2020-12-22 09:52:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 09:52:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 30230 transitions. [2020-12-22 09:52:46,435 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 30230 transitions. Word has length 94 [2020-12-22 09:52:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:46,435 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 30230 transitions. [2020-12-22 09:52:46,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 30230 transitions. [2020-12-22 09:52:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:52:46,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:46,443 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:46,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:52:46,443 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:46,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:46,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2023924156, now seen corresponding path program 1 times [2020-12-22 09:52:46,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:46,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986833152] [2020-12-22 09:52:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:46,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986833152] [2020-12-22 09:52:46,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:46,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:46,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924859733] [2020-12-22 09:52:46,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:46,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:46,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:46,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:46,526 INFO L87 Difference]: Start difference. First operand 20650 states and 30230 transitions. Second operand 3 states. [2020-12-22 09:52:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:47,439 INFO L93 Difference]: Finished difference Result 34059 states and 49627 transitions. [2020-12-22 09:52:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:47,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2020-12-22 09:52:47,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:47,461 INFO L225 Difference]: With dead ends: 34059 [2020-12-22 09:52:47,461 INFO L226 Difference]: Without dead ends: 14953 [2020-12-22 09:52:47,484 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 09:52:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14953 states. [2020-12-22 09:52:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14953 to 14951. [2020-12-22 09:52:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14951 states. [2020-12-22 09:52:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 22072 transitions. [2020-12-22 09:52:48,357 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 22072 transitions. Word has length 96 [2020-12-22 09:52:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:48,358 INFO L481 AbstractCegarLoop]: Abstraction has 14951 states and 22072 transitions. [2020-12-22 09:52:48,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 22072 transitions. [2020-12-22 09:52:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:52:48,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:48,361 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:48,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:52:48,362 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:48,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1980328951, now seen corresponding path program 1 times [2020-12-22 09:52:48,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:48,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801424680] [2020-12-22 09:52:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:52:48,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801424680] [2020-12-22 09:52:48,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:48,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:48,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932736722] [2020-12-22 09:52:48,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:48,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:48,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:48,489 INFO L87 Difference]: Start difference. First operand 14951 states and 22072 transitions. Second operand 7 states. [2020-12-22 09:52:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:49,738 INFO L93 Difference]: Finished difference Result 27123 states and 39678 transitions. [2020-12-22 09:52:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:49,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-22 09:52:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:49,774 INFO L225 Difference]: With dead ends: 27123 [2020-12-22 09:52:49,774 INFO L226 Difference]: Without dead ends: 24689 [2020-12-22 09:52:49,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24689 states. [2020-12-22 09:52:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24689 to 17383. [2020-12-22 09:52:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17383 states. [2020-12-22 09:52:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17383 states to 17383 states and 25560 transitions. [2020-12-22 09:52:50,893 INFO L78 Accepts]: Start accepts. Automaton has 17383 states and 25560 transitions. Word has length 96 [2020-12-22 09:52:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:50,893 INFO L481 AbstractCegarLoop]: Abstraction has 17383 states and 25560 transitions. [2020-12-22 09:52:50,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 17383 states and 25560 transitions. [2020-12-22 09:52:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:52:50,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:50,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:50,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:52:50,900 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:50,900 INFO L82 PathProgramCache]: Analyzing trace with hash 28168523, now seen corresponding path program 1 times [2020-12-22 09:52:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:50,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965717027] [2020-12-22 09:52:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:50,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965717027] [2020-12-22 09:52:50,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:50,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:50,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419190133] [2020-12-22 09:52:50,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:50,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:50,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:50,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:50,967 INFO L87 Difference]: Start difference. First operand 17383 states and 25560 transitions. Second operand 3 states. [2020-12-22 09:52:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:51,724 INFO L93 Difference]: Finished difference Result 25291 states and 36898 transitions. [2020-12-22 09:52:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:51,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:52:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:51,739 INFO L225 Difference]: With dead ends: 25291 [2020-12-22 09:52:51,740 INFO L226 Difference]: Without dead ends: 9481 [2020-12-22 09:52:51,759 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 09:52:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9481 states. [2020-12-22 09:52:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9481 to 9479. [2020-12-22 09:52:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9479 states. [2020-12-22 09:52:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9479 states to 9479 states and 14120 transitions. [2020-12-22 09:52:52,293 INFO L78 Accepts]: Start accepts. Automaton has 9479 states and 14120 transitions. Word has length 97 [2020-12-22 09:52:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:52,293 INFO L481 AbstractCegarLoop]: Abstraction has 9479 states and 14120 transitions. [2020-12-22 09:52:52,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 9479 states and 14120 transitions. [2020-12-22 09:52:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:52:52,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:52,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:52,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:52:52,298 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:52,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:52,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1887443071, now seen corresponding path program 1 times [2020-12-22 09:52:52,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:52,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882341950] [2020-12-22 09:52:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882341950] [2020-12-22 09:52:52,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:52,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:52,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563201947] [2020-12-22 09:52:52,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:52,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:52,363 INFO L87 Difference]: Start difference. First operand 9479 states and 14120 transitions. Second operand 3 states. [2020-12-22 09:52:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:52,776 INFO L93 Difference]: Finished difference Result 13435 states and 19738 transitions. [2020-12-22 09:52:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:52,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:52:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:52,787 INFO L225 Difference]: With dead ends: 13435 [2020-12-22 09:52:52,787 INFO L226 Difference]: Without dead ends: 5529 [2020-12-22 09:52:52,800 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 09:52:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2020-12-22 09:52:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 5527. [2020-12-22 09:52:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5527 states. [2020-12-22 09:52:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 8452 transitions. [2020-12-22 09:52:53,248 INFO L78 Accepts]: Start accepts. Automaton has 5527 states and 8452 transitions. Word has length 97 [2020-12-22 09:52:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:53,248 INFO L481 AbstractCegarLoop]: Abstraction has 5527 states and 8452 transitions. [2020-12-22 09:52:53,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 5527 states and 8452 transitions. [2020-12-22 09:52:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:52:53,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:53,252 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:53,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:52:53,253 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash -300840777, now seen corresponding path program 1 times [2020-12-22 09:52:53,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:53,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178921215] [2020-12-22 09:52:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:53,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178921215] [2020-12-22 09:52:53,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:53,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:53,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494765347] [2020-12-22 09:52:53,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:53,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:53,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:53,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:53,326 INFO L87 Difference]: Start difference. First operand 5527 states and 8452 transitions. Second operand 3 states. [2020-12-22 09:52:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:53,560 INFO L93 Difference]: Finished difference Result 7507 states and 11236 transitions. [2020-12-22 09:52:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:53,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2020-12-22 09:52:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:53,567 INFO L225 Difference]: With dead ends: 7507 [2020-12-22 09:52:53,567 INFO L226 Difference]: Without dead ends: 3553 [2020-12-22 09:52:53,572 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 09:52:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2020-12-22 09:52:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3551. [2020-12-22 09:52:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3551 states. [2020-12-22 09:52:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 5644 transitions. [2020-12-22 09:52:53,744 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 5644 transitions. Word has length 97 [2020-12-22 09:52:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:53,745 INFO L481 AbstractCegarLoop]: Abstraction has 3551 states and 5644 transitions. [2020-12-22 09:52:53,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 5644 transitions. [2020-12-22 09:52:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:52:53,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:53,747 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, 1, 1, 1, 1, 1, 1, 1, 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 09:52:53,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:52:53,748 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:53,748 INFO L82 PathProgramCache]: Analyzing trace with hash -387959571, now seen corresponding path program 1 times [2020-12-22 09:52:53,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:53,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994604938] [2020-12-22 09:52:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:54,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994604938] [2020-12-22 09:52:54,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637202264] [2020-12-22 09:52:54,174 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 09:52:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:52:54,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:52:54,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:54,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 09:52:54,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096602340] [2020-12-22 09:52:54,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 09:52:54,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:54,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 09:52:54,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:52:54,699 INFO L87 Difference]: Start difference. First operand 3551 states and 5644 transitions. Second operand 16 states. [2020-12-22 09:52:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:58,801 INFO L93 Difference]: Finished difference Result 14622 states and 20663 transitions. [2020-12-22 09:52:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:52:58,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-12-22 09:52:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:58,826 INFO L225 Difference]: With dead ends: 14622 [2020-12-22 09:52:58,827 INFO L226 Difference]: Without dead ends: 12644 [2020-12-22 09:52:58,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 09:52:58,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12644 states. [2020-12-22 09:52:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12644 to 9273. [2020-12-22 09:52:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9273 states. [2020-12-22 09:52:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9273 states to 9273 states and 13206 transitions. [2020-12-22 09:52:59,601 INFO L78 Accepts]: Start accepts. Automaton has 9273 states and 13206 transitions. Word has length 97 [2020-12-22 09:52:59,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:59,601 INFO L481 AbstractCegarLoop]: Abstraction has 9273 states and 13206 transitions. [2020-12-22 09:52:59,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 09:52:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 9273 states and 13206 transitions. [2020-12-22 09:52:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:52:59,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:59,605 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, 1, 1, 1, 1, 1, 1, 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 09:52:59,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 09:52:59,821 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:59,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:59,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1231715697, now seen corresponding path program 1 times [2020-12-22 09:52:59,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:59,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854473921] [2020-12-22 09:52:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:00,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854473921] [2020-12-22 09:53:00,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949013889] [2020-12-22 09:53:00,192 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 09:53:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:00,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:00,548 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:00,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:00,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:53:00,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459361336] [2020-12-22 09:53:00,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:53:00,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:00,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:53:00,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:53:00,932 INFO L87 Difference]: Start difference. First operand 9273 states and 13206 transitions. Second operand 22 states. [2020-12-22 09:53:03,233 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-12-22 09:53:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:05,701 INFO L93 Difference]: Finished difference Result 40074 states and 54272 transitions. [2020-12-22 09:53:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:53:05,702 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2020-12-22 09:53:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:05,754 INFO L225 Difference]: With dead ends: 40074 [2020-12-22 09:53:05,754 INFO L226 Difference]: Without dead ends: 33571 [2020-12-22 09:53:05,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=415, Invalid=1391, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 09:53:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33571 states. [2020-12-22 09:53:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33571 to 21776. [2020-12-22 09:53:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21776 states. [2020-12-22 09:53:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21776 states to 21776 states and 29745 transitions. [2020-12-22 09:53:07,703 INFO L78 Accepts]: Start accepts. Automaton has 21776 states and 29745 transitions. Word has length 98 [2020-12-22 09:53:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:07,703 INFO L481 AbstractCegarLoop]: Abstraction has 21776 states and 29745 transitions. [2020-12-22 09:53:07,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:53:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21776 states and 29745 transitions. [2020-12-22 09:53:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:07,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:07,706 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, 1, 1, 1, 1, 1, 1, 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 09:53:07,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:53:07,908 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1198087855, now seen corresponding path program 1 times [2020-12-22 09:53:07,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:07,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090525430] [2020-12-22 09:53:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090525430] [2020-12-22 09:53:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777708458] [2020-12-22 09:53:08,215 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 09:53:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:08,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:08,561 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:08,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:08,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:53:08,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818208724] [2020-12-22 09:53:08,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:53:08,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:53:09,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:53:09,000 INFO L87 Difference]: Start difference. First operand 21776 states and 29745 transitions. Second operand 17 states. [2020-12-22 09:53:09,840 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:11,704 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:12,822 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:16,844 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:32,316 INFO L93 Difference]: Finished difference Result 193755 states and 257231 transitions. [2020-12-22 09:53:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 09:53:32,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 98 [2020-12-22 09:53:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:32,581 INFO L225 Difference]: With dead ends: 193755 [2020-12-22 09:53:32,581 INFO L226 Difference]: Without dead ends: 174198 [2020-12-22 09:53:32,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2540 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1236, Invalid=6596, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 09:53:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174198 states. [2020-12-22 09:53:44,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174198 to 112049. [2020-12-22 09:53:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112049 states. [2020-12-22 09:53:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112049 states to 112049 states and 147128 transitions. [2020-12-22 09:53:44,681 INFO L78 Accepts]: Start accepts. Automaton has 112049 states and 147128 transitions. Word has length 98 [2020-12-22 09:53:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:44,681 INFO L481 AbstractCegarLoop]: Abstraction has 112049 states and 147128 transitions. [2020-12-22 09:53:44,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:53:44,681 INFO L276 IsEmpty]: Start isEmpty. Operand 112049 states and 147128 transitions. [2020-12-22 09:53:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:44,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:44,685 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, 1, 1, 1, 1, 1, 1, 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 09:53:44,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 09:53:44,886 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2130421773, now seen corresponding path program 1 times [2020-12-22 09:53:44,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:44,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168350908] [2020-12-22 09:53:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:53:45,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168350908] [2020-12-22 09:53:45,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:45,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:45,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153353064] [2020-12-22 09:53:45,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:53:45,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:53:45,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:53:45,231 INFO L87 Difference]: Start difference. First operand 112049 states and 147128 transitions. Second operand 6 states. [2020-12-22 09:53:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:51,410 INFO L93 Difference]: Finished difference Result 168468 states and 221687 transitions. [2020-12-22 09:53:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:53:51,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:53:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:51,604 INFO L225 Difference]: With dead ends: 168468 [2020-12-22 09:53:51,604 INFO L226 Difference]: Without dead ends: 58164 [2020-12-22 09:53:51,657 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 09:53:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58164 states. [2020-12-22 09:53:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58164 to 58164. [2020-12-22 09:53:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58164 states. [2020-12-22 09:53:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58164 states to 58164 states and 76793 transitions. [2020-12-22 09:53:57,534 INFO L78 Accepts]: Start accepts. Automaton has 58164 states and 76793 transitions. Word has length 98 [2020-12-22 09:53:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:57,535 INFO L481 AbstractCegarLoop]: Abstraction has 58164 states and 76793 transitions. [2020-12-22 09:53:57,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:53:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 58164 states and 76793 transitions. [2020-12-22 09:53:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:53:57,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:57,538 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, 1, 1, 1, 1, 1, 1, 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 09:53:57,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:53:57,538 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1745709901, now seen corresponding path program 1 times [2020-12-22 09:53:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:57,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617934053] [2020-12-22 09:53:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:53:57,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617934053] [2020-12-22 09:53:57,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:53:57,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:53:57,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963813031] [2020-12-22 09:53:57,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:53:57,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:57,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:53:57,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:53:57,648 INFO L87 Difference]: Start difference. First operand 58164 states and 76793 transitions. Second operand 6 states. [2020-12-22 09:54:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:02,701 INFO L93 Difference]: Finished difference Result 99830 states and 131236 transitions. [2020-12-22 09:54:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:02,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:02,753 INFO L225 Difference]: With dead ends: 99830 [2020-12-22 09:54:02,754 INFO L226 Difference]: Without dead ends: 43495 [2020-12-22 09:54:02,777 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 09:54:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43495 states. [2020-12-22 09:54:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43495 to 43495. [2020-12-22 09:54:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43495 states. [2020-12-22 09:54:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43495 states to 43495 states and 56838 transitions. [2020-12-22 09:54:07,409 INFO L78 Accepts]: Start accepts. Automaton has 43495 states and 56838 transitions. Word has length 98 [2020-12-22 09:54:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:07,409 INFO L481 AbstractCegarLoop]: Abstraction has 43495 states and 56838 transitions. [2020-12-22 09:54:07,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 43495 states and 56838 transitions. [2020-12-22 09:54:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 09:54:07,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:07,411 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, 1, 1, 1, 1, 1, 1, 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 09:54:07,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:54:07,412 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:07,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1530628851, now seen corresponding path program 1 times [2020-12-22 09:54:07,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:07,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135686893] [2020-12-22 09:54:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:54:07,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135686893] [2020-12-22 09:54:07,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:07,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:07,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966910271] [2020-12-22 09:54:07,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:07,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:07,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:07,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:07,489 INFO L87 Difference]: Start difference. First operand 43495 states and 56838 transitions. Second operand 6 states. [2020-12-22 09:54:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:14,855 INFO L93 Difference]: Finished difference Result 113271 states and 147537 transitions. [2020-12-22 09:54:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:14,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-12-22 09:54:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:14,933 INFO L225 Difference]: With dead ends: 113271 [2020-12-22 09:54:14,933 INFO L226 Difference]: Without dead ends: 71397 [2020-12-22 09:54:14,955 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 09:54:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71397 states. [2020-12-22 09:54:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71397 to 64323. [2020-12-22 09:54:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64323 states. [2020-12-22 09:54:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64323 states to 64323 states and 83659 transitions. [2020-12-22 09:54:21,791 INFO L78 Accepts]: Start accepts. Automaton has 64323 states and 83659 transitions. Word has length 98 [2020-12-22 09:54:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:21,791 INFO L481 AbstractCegarLoop]: Abstraction has 64323 states and 83659 transitions. [2020-12-22 09:54:21,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 64323 states and 83659 transitions. [2020-12-22 09:54:21,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 09:54:21,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:21,794 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, 1, 1, 1, 1, 1, 1, 1, 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 09:54:21,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:54:21,795 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:21,795 INFO L82 PathProgramCache]: Analyzing trace with hash -328972562, now seen corresponding path program 1 times [2020-12-22 09:54:21,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:21,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474446356] [2020-12-22 09:54:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:54:21,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474446356] [2020-12-22 09:54:21,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:54:21,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:54:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218474806] [2020-12-22 09:54:21,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:54:21,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:21,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:54:21,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:54:21,873 INFO L87 Difference]: Start difference. First operand 64323 states and 83659 transitions. Second operand 6 states. [2020-12-22 09:54:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:27,760 INFO L93 Difference]: Finished difference Result 112769 states and 146128 transitions. [2020-12-22 09:54:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:54:27,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-12-22 09:54:27,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:27,824 INFO L225 Difference]: With dead ends: 112769 [2020-12-22 09:54:27,825 INFO L226 Difference]: Without dead ends: 50077 [2020-12-22 09:54:27,851 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 09:54:27,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50077 states. [2020-12-22 09:54:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50077 to 50077. [2020-12-22 09:54:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50077 states. [2020-12-22 09:54:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50077 states to 50077 states and 64714 transitions. [2020-12-22 09:54:33,624 INFO L78 Accepts]: Start accepts. Automaton has 50077 states and 64714 transitions. Word has length 99 [2020-12-22 09:54:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:54:33,624 INFO L481 AbstractCegarLoop]: Abstraction has 50077 states and 64714 transitions. [2020-12-22 09:54:33,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:54:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 50077 states and 64714 transitions. [2020-12-22 09:54:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:54:33,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:54:33,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:54:33,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 09:54:33,627 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:54:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:54:33,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1888515992, now seen corresponding path program 1 times [2020-12-22 09:54:33,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:54:33,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846786550] [2020-12-22 09:54:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:54:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:33,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846786550] [2020-12-22 09:54:33,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471016555] [2020-12-22 09:54:33,914 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 09:54:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:54:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:54:34,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:54:34,353 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:54:34,635 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2020-12-22 09:54:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:54:35,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:54:35,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2020-12-22 09:54:35,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859351426] [2020-12-22 09:54:35,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 09:54:35,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:54:35,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 09:54:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:54:35,323 INFO L87 Difference]: Start difference. First operand 50077 states and 64714 transitions. Second operand 20 states. [2020-12-22 09:54:36,218 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 09:54:36,686 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2020-12-22 09:54:37,295 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:54:38,053 WARN L197 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 116 [2020-12-22 09:54:38,583 WARN L197 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:54:39,308 WARN L197 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:54:40,137 WARN L197 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:54:40,662 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-12-22 09:54:41,297 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:54:41,860 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 111 [2020-12-22 09:54:42,666 WARN L197 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:54:43,276 WARN L197 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:54:44,162 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2020-12-22 09:54:44,878 WARN L197 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2020-12-22 09:54:45,578 WARN L197 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2020-12-22 09:54:46,585 WARN L197 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2020-12-22 09:54:50,435 WARN L197 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:54:51,246 WARN L197 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 128 [2020-12-22 09:54:51,957 WARN L197 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:54:52,386 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:54:53,234 WARN L197 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2020-12-22 09:54:53,699 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:54:54,198 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:54:54,668 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:54:55,303 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-12-22 09:54:55,649 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:54:56,606 WARN L197 SmtUtils]: Spent 844.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 119 [2020-12-22 09:54:57,280 WARN L197 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:54:57,918 WARN L197 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-12-22 09:54:58,287 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:54:59,374 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:54:59,751 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 09:55:00,497 WARN L197 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 116 [2020-12-22 09:55:00,907 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 09:55:01,299 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:55:04,949 WARN L197 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 108 [2020-12-22 09:55:06,581 WARN L197 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2020-12-22 09:55:07,590 WARN L197 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 125 [2020-12-22 09:55:08,070 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:55:08,545 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-12-22 09:55:09,294 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-12-22 09:55:09,814 WARN L197 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-22 09:55:10,409 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:55:10,754 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-22 09:55:11,328 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:55:11,614 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 09:55:23,946 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:55:24,286 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 09:55:24,601 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:55:25,239 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:55:25,664 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:55:28,065 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:55:28,651 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:55:35,929 WARN L197 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-22 09:55:36,716 WARN L197 SmtUtils]: Spent 504.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-12-22 09:55:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:43,137 INFO L93 Difference]: Finished difference Result 223863 states and 286246 transitions. [2020-12-22 09:55:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 09:55:43,138 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-12-22 09:55:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:43,623 INFO L225 Difference]: With dead ends: 223863 [2020-12-22 09:55:43,623 INFO L226 Difference]: Without dead ends: 179281 [2020-12-22 09:55:43,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=1297, Invalid=5183, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 09:55:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179281 states. [2020-12-22 09:55:58,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179281 to 78430. [2020-12-22 09:55:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78430 states. [2020-12-22 09:55:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78430 states to 78430 states and 102079 transitions. [2020-12-22 09:55:58,534 INFO L78 Accepts]: Start accepts. Automaton has 78430 states and 102079 transitions. Word has length 100 [2020-12-22 09:55:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:58,535 INFO L481 AbstractCegarLoop]: Abstraction has 78430 states and 102079 transitions. [2020-12-22 09:55:58,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 09:55:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 78430 states and 102079 transitions. [2020-12-22 09:55:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 09:55:58,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:58,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:58,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:55:58,754 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:58,755 INFO L82 PathProgramCache]: Analyzing trace with hash 33771300, now seen corresponding path program 1 times [2020-12-22 09:55:58,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:58,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576425619] [2020-12-22 09:55:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:58,818 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 09:55:58,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576425619] [2020-12-22 09:55:58,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:58,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:58,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431972327] [2020-12-22 09:55:58,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:58,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:58,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:58,820 INFO L87 Difference]: Start difference. First operand 78430 states and 102079 transitions. Second operand 3 states.