/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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:09:12,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:09:12,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:09:12,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:09:12,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:09:12,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:09:12,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:09:12,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:09:12,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:09:12,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:09:12,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:09:12,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:09:12,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:09:12,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:09:12,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:09:12,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:09:12,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:09:12,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:09:12,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:09:12,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:09:12,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:09:12,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:09:12,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:09:12,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:09:12,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 10:09:12,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:09:12,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:09:12,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:09:12,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:09:12,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:09:12,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:09:12,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:09:12,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:09:12,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:09:12,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:09:12,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:09:12,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:09:12,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:09:12,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:09:12,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:09:12,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:09:12,273 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:09:12,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:09:12,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:09:12,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:09:12,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:09:12,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:09:12,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:09:12,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:09:12,275 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:09:12,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:09:12,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:09:12,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:09:12,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:09:12,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:09:12,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:09:12,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:09:12,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:09:12,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:09:12,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:09:12,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:09:12,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:09:12,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:09:12,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:09:12,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:09:12,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:09:12,674 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:09:12,675 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:09:12,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:09:12,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cb2f4591/52fc288820414a4f8c5c1e0c93b1cc10/FLAGf9b8faec9 [2020-12-22 10:09:13,812 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:09:13,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:09:13,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cb2f4591/52fc288820414a4f8c5c1e0c93b1cc10/FLAGf9b8faec9 [2020-12-22 10:09:14,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cb2f4591/52fc288820414a4f8c5c1e0c93b1cc10 [2020-12-22 10:09:14,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:09:14,322 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:09:14,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:09:14,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:09:14,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:09:14,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:09:14" (1/1) ... [2020-12-22 10:09:14,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee2e9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:14, skipping insertion in model container [2020-12-22 10:09:14,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:09:14" (1/1) ... [2020-12-22 10:09:14,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:09:14,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:09:14,951 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[15688,15701] [2020-12-22 10:09:15,084 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[23193,23206] [2020-12-22 10:09:16,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:09:16,093 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:09:16,222 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[15688,15701] [2020-12-22 10:09:16,238 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.6_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c[23193,23206] [2020-12-22 10:09:16,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:09:16,934 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:09:16,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16 WrapperNode [2020-12-22 10:09:16,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:09:16,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:09:16,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:09:16,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:09:16,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:17,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:17,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:09:17,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:09:17,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:09:17,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:09:17,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:17,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:17,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:17,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:17,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:17,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:17,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (1/1) ... [2020-12-22 10:09:18,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:09:18,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:09:18,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:09:18,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:09:18,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (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 10:09:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:09:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:09:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:09:18,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:09:23,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:09:23,900 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:09:23,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:09:23 BoogieIcfgContainer [2020-12-22 10:09:23,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:09:23,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:09:23,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:09:23,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:09:23,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:09:14" (1/3) ... [2020-12-22 10:09:23,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284d7c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:09:23, skipping insertion in model container [2020-12-22 10:09:23,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:09:16" (2/3) ... [2020-12-22 10:09:23,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284d7c4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:09:23, skipping insertion in model container [2020-12-22 10:09:23,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:09:23" (3/3) ... [2020-12-22 10:09:23,919 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6_overflow.ufo.UNBOUNDED.pals+Problem12_label09.c [2020-12-22 10:09:23,931 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:09:23,938 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:09:23,958 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:09:24,013 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:09:24,014 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:09:24,014 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:09:24,014 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:09:24,014 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:09:24,014 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:09:24,015 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:09:24,015 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:09:24,059 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states. [2020-12-22 10:09:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:09:24,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:24,078 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] [2020-12-22 10:09:24,079 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:24,088 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:09:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:24,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774518099] [2020-12-22 10:09:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:09:24,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774518099] [2020-12-22 10:09:24,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:24,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:09:24,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207705719] [2020-12-22 10:09:24,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:09:24,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:24,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:09:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:09:24,540 INFO L87 Difference]: Start difference. First operand 925 states. Second operand 2 states. [2020-12-22 10:09:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:24,643 INFO L93 Difference]: Finished difference Result 1802 states and 3414 transitions. [2020-12-22 10:09:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:09:24,645 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:09:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:24,698 INFO L225 Difference]: With dead ends: 1802 [2020-12-22 10:09:24,699 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 10:09:24,709 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 10:09:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 10:09:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2020-12-22 10:09:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-12-22 10:09:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1619 transitions. [2020-12-22 10:09:24,838 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1619 transitions. Word has length 38 [2020-12-22 10:09:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:24,838 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1619 transitions. [2020-12-22 10:09:24,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:09:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1619 transitions. [2020-12-22 10:09:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:09:24,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:24,847 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] [2020-12-22 10:09:24,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:09:24,847 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:24,850 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:09:24,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:24,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109400532] [2020-12-22 10:09:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:25,065 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 10:09:25,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109400532] [2020-12-22 10:09:25,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:25,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:09:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903342216] [2020-12-22 10:09:25,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:09:25,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:25,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:09:25,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:09:25,070 INFO L87 Difference]: Start difference. First operand 859 states and 1619 transitions. Second operand 5 states. [2020-12-22 10:09:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:25,338 INFO L93 Difference]: Finished difference Result 922 states and 1717 transitions. [2020-12-22 10:09:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:09:25,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:09:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:25,345 INFO L225 Difference]: With dead ends: 922 [2020-12-22 10:09:25,345 INFO L226 Difference]: Without dead ends: 859 [2020-12-22 10:09:25,346 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 10:09:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-12-22 10:09:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2020-12-22 10:09:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2020-12-22 10:09:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1579 transitions. [2020-12-22 10:09:25,369 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1579 transitions. Word has length 38 [2020-12-22 10:09:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:25,369 INFO L481 AbstractCegarLoop]: Abstraction has 859 states and 1579 transitions. [2020-12-22 10:09:25,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:09:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1579 transitions. [2020-12-22 10:09:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 10:09:25,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:25,372 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 10:09:25,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:09:25,372 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 871971539, now seen corresponding path program 1 times [2020-12-22 10:09:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:25,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089146615] [2020-12-22 10:09:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:25,592 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 10:09:25,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089146615] [2020-12-22 10:09:25,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:25,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304182376] [2020-12-22 10:09:25,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:09:25,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:09:25,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:09:25,597 INFO L87 Difference]: Start difference. First operand 859 states and 1579 transitions. Second operand 4 states. [2020-12-22 10:09:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:36,900 INFO L93 Difference]: Finished difference Result 3114 states and 5888 transitions. [2020-12-22 10:09:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:09:36,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 10:09:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:36,919 INFO L225 Difference]: With dead ends: 3114 [2020-12-22 10:09:36,920 INFO L226 Difference]: Without dead ends: 2361 [2020-12-22 10:09:36,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:09:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2020-12-22 10:09:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2361. [2020-12-22 10:09:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2361 states. [2020-12-22 10:09:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3693 transitions. [2020-12-22 10:09:36,997 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3693 transitions. Word has length 67 [2020-12-22 10:09:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:36,998 INFO L481 AbstractCegarLoop]: Abstraction has 2361 states and 3693 transitions. [2020-12-22 10:09:36,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:09:36,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3693 transitions. [2020-12-22 10:09:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:09:37,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:37,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:37,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:09:37,001 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:37,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:09:37,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:37,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328600197] [2020-12-22 10:09:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:37,083 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 10:09:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328600197] [2020-12-22 10:09:37,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:37,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:37,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180382738] [2020-12-22 10:09:37,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:37,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:37,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:37,086 INFO L87 Difference]: Start difference. First operand 2361 states and 3693 transitions. Second operand 3 states. [2020-12-22 10:09:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:37,134 INFO L93 Difference]: Finished difference Result 2473 states and 3871 transitions. [2020-12-22 10:09:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:37,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:09:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:37,148 INFO L225 Difference]: With dead ends: 2473 [2020-12-22 10:09:37,149 INFO L226 Difference]: Without dead ends: 2414 [2020-12-22 10:09:37,150 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 10:09:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2020-12-22 10:09:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2412. [2020-12-22 10:09:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2412 states. [2020-12-22 10:09:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3775 transitions. [2020-12-22 10:09:37,207 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3775 transitions. Word has length 77 [2020-12-22 10:09:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:37,208 INFO L481 AbstractCegarLoop]: Abstraction has 2412 states and 3775 transitions. [2020-12-22 10:09:37,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3775 transitions. [2020-12-22 10:09:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:09:37,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:37,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:37,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:09:37,210 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:09:37,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:37,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346343538] [2020-12-22 10:09:37,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:37,289 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 10:09:37,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346343538] [2020-12-22 10:09:37,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:37,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:37,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669231007] [2020-12-22 10:09:37,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:37,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:37,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:37,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:37,291 INFO L87 Difference]: Start difference. First operand 2412 states and 3775 transitions. Second operand 3 states. [2020-12-22 10:09:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:37,342 INFO L93 Difference]: Finished difference Result 2620 states and 4107 transitions. [2020-12-22 10:09:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:37,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:09:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:37,357 INFO L225 Difference]: With dead ends: 2620 [2020-12-22 10:09:37,357 INFO L226 Difference]: Without dead ends: 2510 [2020-12-22 10:09:37,359 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 10:09:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2020-12-22 10:09:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2508. [2020-12-22 10:09:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2508 states. [2020-12-22 10:09:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3928 transitions. [2020-12-22 10:09:37,425 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3928 transitions. Word has length 77 [2020-12-22 10:09:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:37,426 INFO L481 AbstractCegarLoop]: Abstraction has 2508 states and 3928 transitions. [2020-12-22 10:09:37,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3928 transitions. [2020-12-22 10:09:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:09:37,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:37,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:37,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:09:37,428 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:37,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:37,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:09:37,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:37,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920347557] [2020-12-22 10:09:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:37,559 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 10:09:37,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920347557] [2020-12-22 10:09:37,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:37,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:37,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500758844] [2020-12-22 10:09:37,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:37,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:37,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:37,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:37,563 INFO L87 Difference]: Start difference. First operand 2508 states and 3928 transitions. Second operand 8 states. [2020-12-22 10:09:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:38,019 INFO L93 Difference]: Finished difference Result 4980 states and 7876 transitions. [2020-12-22 10:09:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:09:38,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:09:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:38,046 INFO L225 Difference]: With dead ends: 4980 [2020-12-22 10:09:38,046 INFO L226 Difference]: Without dead ends: 4774 [2020-12-22 10:09:38,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:09:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2020-12-22 10:09:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 2712. [2020-12-22 10:09:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2712 states. [2020-12-22 10:09:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4248 transitions. [2020-12-22 10:09:38,148 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4248 transitions. Word has length 77 [2020-12-22 10:09:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:38,148 INFO L481 AbstractCegarLoop]: Abstraction has 2712 states and 4248 transitions. [2020-12-22 10:09:38,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4248 transitions. [2020-12-22 10:09:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:38,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:38,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:38,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:09:38,150 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:09:38,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:38,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796504036] [2020-12-22 10:09:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:38,232 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 10:09:38,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796504036] [2020-12-22 10:09:38,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:38,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:38,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151779607] [2020-12-22 10:09:38,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:38,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:38,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:38,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:38,235 INFO L87 Difference]: Start difference. First operand 2712 states and 4248 transitions. Second operand 3 states. [2020-12-22 10:09:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:38,321 INFO L93 Difference]: Finished difference Result 3320 states and 5208 transitions. [2020-12-22 10:09:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:38,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:38,337 INFO L225 Difference]: With dead ends: 3320 [2020-12-22 10:09:38,337 INFO L226 Difference]: Without dead ends: 2910 [2020-12-22 10:09:38,339 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 10:09:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2020-12-22 10:09:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2908. [2020-12-22 10:09:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2908 states. [2020-12-22 10:09:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4552 transitions. [2020-12-22 10:09:38,433 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4552 transitions. Word has length 79 [2020-12-22 10:09:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:38,434 INFO L481 AbstractCegarLoop]: Abstraction has 2908 states and 4552 transitions. [2020-12-22 10:09:38,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4552 transitions. [2020-12-22 10:09:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:38,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:38,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:38,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:09:38,436 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:38,436 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:09:38,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:38,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90111284] [2020-12-22 10:09:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:38,758 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 10:09:38,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90111284] [2020-12-22 10:09:38,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:38,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:38,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135490262] [2020-12-22 10:09:38,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:38,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:38,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:38,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:38,762 INFO L87 Difference]: Start difference. First operand 2908 states and 4552 transitions. Second operand 8 states. [2020-12-22 10:09:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:39,150 INFO L93 Difference]: Finished difference Result 3514 states and 5504 transitions. [2020-12-22 10:09:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:39,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:09:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:39,166 INFO L225 Difference]: With dead ends: 3514 [2020-12-22 10:09:39,167 INFO L226 Difference]: Without dead ends: 2910 [2020-12-22 10:09:39,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:09:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2020-12-22 10:09:39,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2908. [2020-12-22 10:09:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2908 states. [2020-12-22 10:09:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4546 transitions. [2020-12-22 10:09:39,275 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4546 transitions. Word has length 79 [2020-12-22 10:09:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:39,275 INFO L481 AbstractCegarLoop]: Abstraction has 2908 states and 4546 transitions. [2020-12-22 10:09:39,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4546 transitions. [2020-12-22 10:09:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:39,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:39,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:39,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:09:39,279 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:39,279 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:09:39,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:39,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900643442] [2020-12-22 10:09:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:39,382 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 10:09:39,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900643442] [2020-12-22 10:09:39,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:39,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:39,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937863441] [2020-12-22 10:09:39,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:39,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:39,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:39,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:39,386 INFO L87 Difference]: Start difference. First operand 2908 states and 4546 transitions. Second operand 3 states. [2020-12-22 10:09:39,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:39,496 INFO L93 Difference]: Finished difference Result 4044 states and 6316 transitions. [2020-12-22 10:09:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:39,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:39,526 INFO L225 Difference]: With dead ends: 4044 [2020-12-22 10:09:39,527 INFO L226 Difference]: Without dead ends: 3440 [2020-12-22 10:09:39,529 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 10:09:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2020-12-22 10:09:39,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3438. [2020-12-22 10:09:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3438 states. [2020-12-22 10:09:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 5358 transitions. [2020-12-22 10:09:39,681 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 5358 transitions. Word has length 79 [2020-12-22 10:09:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:39,682 INFO L481 AbstractCegarLoop]: Abstraction has 3438 states and 5358 transitions. [2020-12-22 10:09:39,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 5358 transitions. [2020-12-22 10:09:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:39,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:39,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:39,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:09:39,684 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:39,684 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:09:39,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:39,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055749920] [2020-12-22 10:09:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:39,773 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 10:09:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055749920] [2020-12-22 10:09:39,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:39,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283936296] [2020-12-22 10:09:39,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:39,775 INFO L87 Difference]: Start difference. First operand 3438 states and 5358 transitions. Second operand 3 states. [2020-12-22 10:09:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:39,954 INFO L93 Difference]: Finished difference Result 5562 states and 8632 transitions. [2020-12-22 10:09:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:39,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:39,981 INFO L225 Difference]: With dead ends: 5562 [2020-12-22 10:09:39,982 INFO L226 Difference]: Without dead ends: 4428 [2020-12-22 10:09:39,987 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 10:09:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4428 states. [2020-12-22 10:09:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4428 to 4426. [2020-12-22 10:09:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4426 states. [2020-12-22 10:09:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 6850 transitions. [2020-12-22 10:09:40,196 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 6850 transitions. Word has length 79 [2020-12-22 10:09:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:40,196 INFO L481 AbstractCegarLoop]: Abstraction has 4426 states and 6850 transitions. [2020-12-22 10:09:40,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 6850 transitions. [2020-12-22 10:09:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:40,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:40,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:40,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:09:40,198 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:09:40,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:40,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882045447] [2020-12-22 10:09:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:40,270 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 10:09:40,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882045447] [2020-12-22 10:09:40,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:40,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:40,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896217405] [2020-12-22 10:09:40,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:40,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:40,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:40,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:40,275 INFO L87 Difference]: Start difference. First operand 4426 states and 6850 transitions. Second operand 3 states. [2020-12-22 10:09:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:40,626 INFO L93 Difference]: Finished difference Result 8382 states and 12868 transitions. [2020-12-22 10:09:40,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:40,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:40,643 INFO L225 Difference]: With dead ends: 8382 [2020-12-22 10:09:40,643 INFO L226 Difference]: Without dead ends: 6260 [2020-12-22 10:09:40,648 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 10:09:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6260 states. [2020-12-22 10:09:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6260 to 6258. [2020-12-22 10:09:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6258 states. [2020-12-22 10:09:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6258 states to 6258 states and 9570 transitions. [2020-12-22 10:09:41,064 INFO L78 Accepts]: Start accepts. Automaton has 6258 states and 9570 transitions. Word has length 79 [2020-12-22 10:09:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:41,064 INFO L481 AbstractCegarLoop]: Abstraction has 6258 states and 9570 transitions. [2020-12-22 10:09:41,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6258 states and 9570 transitions. [2020-12-22 10:09:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:09:41,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:41,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:41,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:09:41,066 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:41,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:09:41,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:41,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474934977] [2020-12-22 10:09:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:41,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:41,139 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 10:09:41,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474934977] [2020-12-22 10:09:41,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:41,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:09:41,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590282374] [2020-12-22 10:09:41,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:09:41,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:41,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:09:41,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:09:41,141 INFO L87 Difference]: Start difference. First operand 6258 states and 9570 transitions. Second operand 3 states. [2020-12-22 10:09:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:41,652 INFO L93 Difference]: Finished difference Result 13590 states and 20548 transitions. [2020-12-22 10:09:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:09:41,652 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:09:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:41,673 INFO L225 Difference]: With dead ends: 13590 [2020-12-22 10:09:41,673 INFO L226 Difference]: Without dead ends: 9636 [2020-12-22 10:09:41,681 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 10:09:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2020-12-22 10:09:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 9634. [2020-12-22 10:09:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9634 states. [2020-12-22 10:09:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9634 states to 9634 states and 14482 transitions. [2020-12-22 10:09:42,332 INFO L78 Accepts]: Start accepts. Automaton has 9634 states and 14482 transitions. Word has length 79 [2020-12-22 10:09:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:42,332 INFO L481 AbstractCegarLoop]: Abstraction has 9634 states and 14482 transitions. [2020-12-22 10:09:42,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:09:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 9634 states and 14482 transitions. [2020-12-22 10:09:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:09:42,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:42,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:42,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:09:42,334 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:09:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:42,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496399884] [2020-12-22 10:09:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:42,491 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 10:09:42,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496399884] [2020-12-22 10:09:42,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:42,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:42,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578093024] [2020-12-22 10:09:42,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:42,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:42,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:42,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:42,494 INFO L87 Difference]: Start difference. First operand 9634 states and 14482 transitions. Second operand 8 states. [2020-12-22 10:09:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:43,677 INFO L93 Difference]: Finished difference Result 15969 states and 23625 transitions. [2020-12-22 10:09:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:09:43,677 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:09:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:43,713 INFO L225 Difference]: With dead ends: 15969 [2020-12-22 10:09:43,713 INFO L226 Difference]: Without dead ends: 15967 [2020-12-22 10:09:43,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:09:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15967 states. [2020-12-22 10:09:44,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15967 to 10018. [2020-12-22 10:09:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10018 states. [2020-12-22 10:09:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 14834 transitions. [2020-12-22 10:09:44,437 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 14834 transitions. Word has length 80 [2020-12-22 10:09:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:44,437 INFO L481 AbstractCegarLoop]: Abstraction has 10018 states and 14834 transitions. [2020-12-22 10:09:44,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 14834 transitions. [2020-12-22 10:09:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:44,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:44,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:09:44,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:09:44,445 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:44,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1535674975, now seen corresponding path program 1 times [2020-12-22 10:09:44,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:44,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001811130] [2020-12-22 10:09:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:09:44,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001811130] [2020-12-22 10:09:44,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:44,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:44,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782074528] [2020-12-22 10:09:44,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:44,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:44,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:44,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:44,603 INFO L87 Difference]: Start difference. First operand 10018 states and 14834 transitions. Second operand 8 states. [2020-12-22 10:09:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:47,111 INFO L93 Difference]: Finished difference Result 57840 states and 84361 transitions. [2020-12-22 10:09:47,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:47,112 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:47,234 INFO L225 Difference]: With dead ends: 57840 [2020-12-22 10:09:47,235 INFO L226 Difference]: Without dead ends: 50126 [2020-12-22 10:09:47,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50126 states. [2020-12-22 10:09:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50126 to 17730. [2020-12-22 10:09:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17730 states. [2020-12-22 10:09:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 25970 transitions. [2020-12-22 10:09:49,157 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 25970 transitions. Word has length 111 [2020-12-22 10:09:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:49,157 INFO L481 AbstractCegarLoop]: Abstraction has 17730 states and 25970 transitions. [2020-12-22 10:09:49,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 25970 transitions. [2020-12-22 10:09:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:49,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:49,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:49,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:09:49,166 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1506152757, now seen corresponding path program 1 times [2020-12-22 10:09:49,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:49,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695386717] [2020-12-22 10:09:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:09:49,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695386717] [2020-12-22 10:09:49,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:49,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:49,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237004775] [2020-12-22 10:09:49,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:49,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:49,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:49,467 INFO L87 Difference]: Start difference. First operand 17730 states and 25970 transitions. Second operand 8 states. [2020-12-22 10:09:52,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:52,771 INFO L93 Difference]: Finished difference Result 65552 states and 95497 transitions. [2020-12-22 10:09:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:52,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:52,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:52,970 INFO L225 Difference]: With dead ends: 65552 [2020-12-22 10:09:52,971 INFO L226 Difference]: Without dead ends: 57838 [2020-12-22 10:09:52,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:53,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57838 states. [2020-12-22 10:09:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57838 to 29314. [2020-12-22 10:09:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29314 states. [2020-12-22 10:09:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29314 states to 29314 states and 42594 transitions. [2020-12-22 10:09:55,049 INFO L78 Accepts]: Start accepts. Automaton has 29314 states and 42594 transitions. Word has length 111 [2020-12-22 10:09:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:09:55,050 INFO L481 AbstractCegarLoop]: Abstraction has 29314 states and 42594 transitions. [2020-12-22 10:09:55,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:09:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 29314 states and 42594 transitions. [2020-12-22 10:09:55,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:09:55,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:09:55,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:09:55,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:09:55,059 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:09:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:09:55,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1232465045, now seen corresponding path program 1 times [2020-12-22 10:09:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:09:55,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701607587] [2020-12-22 10:09:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:09:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:09:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:09:55,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701607587] [2020-12-22 10:09:55,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:09:55,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:09:55,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17613899] [2020-12-22 10:09:55,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:09:55,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:09:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:09:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:09:55,205 INFO L87 Difference]: Start difference. First operand 29314 states and 42594 transitions. Second operand 8 states. [2020-12-22 10:09:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:09:59,596 INFO L93 Difference]: Finished difference Result 73264 states and 106633 transitions. [2020-12-22 10:09:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:09:59,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:09:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:09:59,827 INFO L225 Difference]: With dead ends: 73264 [2020-12-22 10:09:59,827 INFO L226 Difference]: Without dead ends: 65550 [2020-12-22 10:09:59,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:09:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65550 states. [2020-12-22 10:10:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65550 to 37026. [2020-12-22 10:10:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37026 states. [2020-12-22 10:10:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37026 states to 37026 states and 53730 transitions. [2020-12-22 10:10:02,319 INFO L78 Accepts]: Start accepts. Automaton has 37026 states and 53730 transitions. Word has length 111 [2020-12-22 10:10:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:02,319 INFO L481 AbstractCegarLoop]: Abstraction has 37026 states and 53730 transitions. [2020-12-22 10:10:02,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:10:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 37026 states and 53730 transitions. [2020-12-22 10:10:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:10:02,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:02,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:02,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:10:02,330 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:02,331 INFO L82 PathProgramCache]: Analyzing trace with hash 586606603, now seen corresponding path program 1 times [2020-12-22 10:10:02,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:02,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875000692] [2020-12-22 10:10:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:10:02,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875000692] [2020-12-22 10:10:02,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:02,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:10:02,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753129900] [2020-12-22 10:10:02,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:10:02,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:10:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:10:02,486 INFO L87 Difference]: Start difference. First operand 37026 states and 53730 transitions. Second operand 8 states. [2020-12-22 10:10:07,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:07,468 INFO L93 Difference]: Finished difference Result 80976 states and 117769 transitions. [2020-12-22 10:10:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:10:07,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:10:07,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:07,581 INFO L225 Difference]: With dead ends: 80976 [2020-12-22 10:10:07,581 INFO L226 Difference]: Without dead ends: 73262 [2020-12-22 10:10:07,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:10:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73262 states. [2020-12-22 10:10:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73262 to 44738. [2020-12-22 10:10:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44738 states. [2020-12-22 10:10:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44738 states to 44738 states and 64866 transitions. [2020-12-22 10:10:10,906 INFO L78 Accepts]: Start accepts. Automaton has 44738 states and 64866 transitions. Word has length 111 [2020-12-22 10:10:10,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:10,906 INFO L481 AbstractCegarLoop]: Abstraction has 44738 states and 64866 transitions. [2020-12-22 10:10:10,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:10:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 44738 states and 64866 transitions. [2020-12-22 10:10:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:10:10,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:10,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:10,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:10:10,923 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:10,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash 766012587, now seen corresponding path program 1 times [2020-12-22 10:10:10,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:10,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207995050] [2020-12-22 10:10:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:10:11,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207995050] [2020-12-22 10:10:11,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:11,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:10:11,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398522421] [2020-12-22 10:10:11,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:10:11,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:10:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:10:11,062 INFO L87 Difference]: Start difference. First operand 44738 states and 64866 transitions. Second operand 8 states. [2020-12-22 10:10:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:17,159 INFO L93 Difference]: Finished difference Result 88688 states and 128905 transitions. [2020-12-22 10:10:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:10:17,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:10:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:17,244 INFO L225 Difference]: With dead ends: 88688 [2020-12-22 10:10:17,244 INFO L226 Difference]: Without dead ends: 80974 [2020-12-22 10:10:17,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:10:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80974 states. [2020-12-22 10:10:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80974 to 52450. [2020-12-22 10:10:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52450 states. [2020-12-22 10:10:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 76002 transitions. [2020-12-22 10:10:21,554 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 76002 transitions. Word has length 111 [2020-12-22 10:10:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:21,554 INFO L481 AbstractCegarLoop]: Abstraction has 52450 states and 76002 transitions. [2020-12-22 10:10:21,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:10:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 76002 transitions. [2020-12-22 10:10:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 10:10:21,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:21,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:10:21,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:10:21,685 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:21,685 INFO L82 PathProgramCache]: Analyzing trace with hash -545390527, now seen corresponding path program 1 times [2020-12-22 10:10:21,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:21,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022183940] [2020-12-22 10:10:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:10:21,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022183940] [2020-12-22 10:10:21,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:21,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:10:21,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839579840] [2020-12-22 10:10:21,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:10:21,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:21,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:10:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:10:21,897 INFO L87 Difference]: Start difference. First operand 52450 states and 76002 transitions. Second operand 8 states. [2020-12-22 10:10:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:28,423 INFO L93 Difference]: Finished difference Result 91728 states and 133321 transitions. [2020-12-22 10:10:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:10:28,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 10:10:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:28,513 INFO L225 Difference]: With dead ends: 91728 [2020-12-22 10:10:28,513 INFO L226 Difference]: Without dead ends: 86350 [2020-12-22 10:10:28,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:10:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86350 states. [2020-12-22 10:10:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86350 to 57826. [2020-12-22 10:10:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57826 states. [2020-12-22 10:10:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57826 states to 57826 states and 83810 transitions. [2020-12-22 10:10:33,362 INFO L78 Accepts]: Start accepts. Automaton has 57826 states and 83810 transitions. Word has length 111 [2020-12-22 10:10:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:33,363 INFO L481 AbstractCegarLoop]: Abstraction has 57826 states and 83810 transitions. [2020-12-22 10:10:33,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:10:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 57826 states and 83810 transitions. [2020-12-22 10:10:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:33,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:33,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:33,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:10:33,381 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1181155843, now seen corresponding path program 1 times [2020-12-22 10:10:33,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:33,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774776148] [2020-12-22 10:10:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:33,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774776148] [2020-12-22 10:10:33,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:33,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:33,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210854168] [2020-12-22 10:10:33,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:33,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:33,464 INFO L87 Difference]: Start difference. First operand 57826 states and 83810 transitions. Second operand 3 states. [2020-12-22 10:10:38,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:38,281 INFO L93 Difference]: Finished difference Result 113350 states and 164020 transitions. [2020-12-22 10:10:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:38,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:10:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:38,340 INFO L225 Difference]: With dead ends: 113350 [2020-12-22 10:10:38,345 INFO L226 Difference]: Without dead ends: 57828 [2020-12-22 10:10:38,374 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 10:10:38,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57828 states. [2020-12-22 10:10:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57828 to 57826. [2020-12-22 10:10:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57826 states. [2020-12-22 10:10:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57826 states to 57826 states and 83122 transitions. [2020-12-22 10:10:43,034 INFO L78 Accepts]: Start accepts. Automaton has 57826 states and 83122 transitions. Word has length 112 [2020-12-22 10:10:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:43,034 INFO L481 AbstractCegarLoop]: Abstraction has 57826 states and 83122 transitions. [2020-12-22 10:10:43,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 57826 states and 83122 transitions. [2020-12-22 10:10:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:43,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:43,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:43,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:10:43,042 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:43,043 INFO L82 PathProgramCache]: Analyzing trace with hash -734589639, now seen corresponding path program 1 times [2020-12-22 10:10:43,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:43,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300357401] [2020-12-22 10:10:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:43,115 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 10:10:43,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300357401] [2020-12-22 10:10:43,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:43,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:43,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333141570] [2020-12-22 10:10:43,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:43,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:43,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:43,118 INFO L87 Difference]: Start difference. First operand 57826 states and 83122 transitions. Second operand 3 states. [2020-12-22 10:10:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:45,862 INFO L93 Difference]: Finished difference Result 85590 states and 122884 transitions. [2020-12-22 10:10:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:45,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:10:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:45,895 INFO L225 Difference]: With dead ends: 85590 [2020-12-22 10:10:45,895 INFO L226 Difference]: Without dead ends: 30068 [2020-12-22 10:10:45,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30068 states. [2020-12-22 10:10:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30068 to 30066. [2020-12-22 10:10:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30066 states. [2020-12-22 10:10:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30066 states to 30066 states and 43018 transitions. [2020-12-22 10:10:48,244 INFO L78 Accepts]: Start accepts. Automaton has 30066 states and 43018 transitions. Word has length 112 [2020-12-22 10:10:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:48,245 INFO L481 AbstractCegarLoop]: Abstraction has 30066 states and 43018 transitions. [2020-12-22 10:10:48,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 30066 states and 43018 transitions. [2020-12-22 10:10:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:48,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:48,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:48,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:10:48,248 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1644766063, now seen corresponding path program 1 times [2020-12-22 10:10:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:48,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830878594] [2020-12-22 10:10:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:48,327 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 10:10:48,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830878594] [2020-12-22 10:10:48,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:48,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:48,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525099193] [2020-12-22 10:10:48,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:48,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:48,330 INFO L87 Difference]: Start difference. First operand 30066 states and 43018 transitions. Second operand 3 states. [2020-12-22 10:10:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:49,701 INFO L93 Difference]: Finished difference Result 43950 states and 62728 transitions. [2020-12-22 10:10:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:49,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:10:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:49,725 INFO L225 Difference]: With dead ends: 43950 [2020-12-22 10:10:49,725 INFO L226 Difference]: Without dead ends: 16188 [2020-12-22 10:10:49,737 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 10:10:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16188 states. [2020-12-22 10:10:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16188 to 16186. [2020-12-22 10:10:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16186 states. [2020-12-22 10:10:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16186 states to 16186 states and 23138 transitions. [2020-12-22 10:10:50,910 INFO L78 Accepts]: Start accepts. Automaton has 16186 states and 23138 transitions. Word has length 112 [2020-12-22 10:10:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:50,911 INFO L481 AbstractCegarLoop]: Abstraction has 16186 states and 23138 transitions. [2020-12-22 10:10:50,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 16186 states and 23138 transitions. [2020-12-22 10:10:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:50,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:50,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:10:50,913 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:50,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1063598939, now seen corresponding path program 1 times [2020-12-22 10:10:50,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:50,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598878187] [2020-12-22 10:10:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:50,988 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 10:10:50,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598878187] [2020-12-22 10:10:50,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:10:50,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:10:50,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995124531] [2020-12-22 10:10:50,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:10:50,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:50,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:10:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:10:50,991 INFO L87 Difference]: Start difference. First operand 16186 states and 23138 transitions. Second operand 3 states. [2020-12-22 10:10:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:10:51,653 INFO L93 Difference]: Finished difference Result 23130 states and 32908 transitions. [2020-12-22 10:10:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:10:51,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2020-12-22 10:10:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:10:51,663 INFO L225 Difference]: With dead ends: 23130 [2020-12-22 10:10:51,663 INFO L226 Difference]: Without dead ends: 9248 [2020-12-22 10:10:51,668 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 10:10:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9248 states. [2020-12-22 10:10:52,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9248 to 9246. [2020-12-22 10:10:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9246 states. [2020-12-22 10:10:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9246 states to 9246 states and 13284 transitions. [2020-12-22 10:10:52,206 INFO L78 Accepts]: Start accepts. Automaton has 9246 states and 13284 transitions. Word has length 112 [2020-12-22 10:10:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:10:52,206 INFO L481 AbstractCegarLoop]: Abstraction has 9246 states and 13284 transitions. [2020-12-22 10:10:52,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:10:52,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9246 states and 13284 transitions. [2020-12-22 10:10:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:10:52,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:10:52,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:10:52,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:10:52,209 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:10:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:10:52,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1150717733, now seen corresponding path program 1 times [2020-12-22 10:10:52,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:10:52,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425090517] [2020-12-22 10:10:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:10:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:10:52,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425090517] [2020-12-22 10:10:52,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588500428] [2020-12-22 10:10:52,584 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 10:10:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:10:52,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 10:10:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:10:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:10:53,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:10:53,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2020-12-22 10:10:53,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119371397] [2020-12-22 10:10:53,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:10:53,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:10:53,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:10:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:10:53,134 INFO L87 Difference]: Start difference. First operand 9246 states and 13284 transitions. Second operand 16 states. [2020-12-22 10:10:56,992 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-12-22 10:10:57,281 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-12-22 10:11:01,235 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:11:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:02,709 INFO L93 Difference]: Finished difference Result 55442 states and 76641 transitions. [2020-12-22 10:11:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 10:11:02,710 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-12-22 10:11:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:02,841 INFO L225 Difference]: With dead ends: 55442 [2020-12-22 10:11:02,842 INFO L226 Difference]: Without dead ends: 48500 [2020-12-22 10:11:02,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=944, Invalid=4606, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 10:11:02,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48500 states. [2020-12-22 10:11:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48500 to 31708. [2020-12-22 10:11:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31708 states. [2020-12-22 10:11:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31708 states to 31708 states and 43894 transitions. [2020-12-22 10:11:06,344 INFO L78 Accepts]: Start accepts. Automaton has 31708 states and 43894 transitions. Word has length 112 [2020-12-22 10:11:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:06,344 INFO L481 AbstractCegarLoop]: Abstraction has 31708 states and 43894 transitions. [2020-12-22 10:11:06,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:11:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 31708 states and 43894 transitions. [2020-12-22 10:11:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:11:06,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:06,350 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:06,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:11:06,565 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:06,566 INFO L82 PathProgramCache]: Analyzing trace with hash 192689075, now seen corresponding path program 1 times [2020-12-22 10:11:06,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:06,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102004586] [2020-12-22 10:11:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:11:06,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102004586] [2020-12-22 10:11:06,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12594454] [2020-12-22 10:11:06,876 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 10:11:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:11:07,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:11:07,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:11:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:11:07,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:11:07,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 10:11:07,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786314453] [2020-12-22 10:11:07,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:11:07,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:07,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:11:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:11:07,647 INFO L87 Difference]: Start difference. First operand 31708 states and 43894 transitions. Second operand 17 states. [2020-12-22 10:11:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:11:21,371 INFO L93 Difference]: Finished difference Result 129742 states and 176189 transitions. [2020-12-22 10:11:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:11:21,371 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 113 [2020-12-22 10:11:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:11:21,511 INFO L225 Difference]: With dead ends: 129742 [2020-12-22 10:11:21,511 INFO L226 Difference]: Without dead ends: 108473 [2020-12-22 10:11:21,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:11:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108473 states. [2020-12-22 10:11:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108473 to 63850. [2020-12-22 10:11:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63850 states. [2020-12-22 10:11:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63850 states to 63850 states and 87581 transitions. [2020-12-22 10:11:28,602 INFO L78 Accepts]: Start accepts. Automaton has 63850 states and 87581 transitions. Word has length 113 [2020-12-22 10:11:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:11:28,602 INFO L481 AbstractCegarLoop]: Abstraction has 63850 states and 87581 transitions. [2020-12-22 10:11:28,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:11:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 63850 states and 87581 transitions. [2020-12-22 10:11:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:11:28,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:11:28,605 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:11:28,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:11:28,809 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:11:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:11:28,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2123021299, now seen corresponding path program 1 times [2020-12-22 10:11:28,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:11:28,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339820226] [2020-12-22 10:11:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:11:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:11:29,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339820226] [2020-12-22 10:11:29,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798544766] [2020-12-22 10:11:29,214 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 10:11:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:11:29,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:11:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:11:29,609 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:11:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:11:29,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:11:29,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:11:29,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467366315] [2020-12-22 10:11:29,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:11:29,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:11:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:11:29,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:11:29,945 INFO L87 Difference]: Start difference. First operand 63850 states and 87581 transitions. Second operand 22 states. [2020-12-22 10:11:30,079 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:31,086 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-12-22 10:11:32,254 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:34,367 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:36,383 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:11:36,780 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:38,582 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:38,714 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:11:39,162 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:11:39,331 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 10:11:40,791 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:11:41,175 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:11:41,600 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:11:43,627 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-22 10:11:43,846 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-22 10:11:44,025 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-12-22 10:11:44,327 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-22 10:12:26,599 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:12:26,739 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 10:12:28,749 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:12:28,902 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 10:12:29,169 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:12:31,182 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46