/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.4.ufo.BOUNDED-8.pals+Problem12_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:45:14,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:45:14,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:45:14,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:45:14,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:45:14,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:45:14,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:45:14,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:45:14,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:45:14,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:45:14,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:45:14,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:45:14,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:45:14,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:45:14,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:45:14,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:45:14,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:45:14,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:45:14,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:45:14,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:45:14,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:45:14,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:45:14,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:45:14,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:45:14,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:45:14,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:45:14,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:45:14,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:45:14,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:45:14,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:45:14,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:45:14,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:45:14,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:45:14,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:45:14,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:45:14,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:45:14,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:45:14,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:45:14,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:45:14,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:45:14,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:45:14,437 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:45:14,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:45:14,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:45:14,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:45:14,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:45:14,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:45:14,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:45:14,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:45:14,440 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:45:14,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:45:14,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:45:14,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:45:14,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:45:14,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:45:14,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:45:14,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:45:14,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:45:14,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:45:14,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:45:14,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:45:14,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:45:14,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:45:14,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:45:14,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:45:14,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:45:14,923 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:45:14,924 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:45:14,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label06.c [2020-12-22 09:45:15,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcaa8c2d9/0c34999c7ff04efdbb2925259ff7efc0/FLAG281aea9bb [2020-12-22 09:45:16,095 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:45:16,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label06.c [2020-12-22 09:45:16,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcaa8c2d9/0c34999c7ff04efdbb2925259ff7efc0/FLAG281aea9bb [2020-12-22 09:45:16,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcaa8c2d9/0c34999c7ff04efdbb2925259ff7efc0 [2020-12-22 09:45:16,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:45:16,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:45:16,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:16,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:45:16,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:45:16,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:16" (1/1) ... [2020-12-22 09:45:16,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12e9936a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:16, skipping insertion in model container [2020-12-22 09:45:16,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:16" (1/1) ... [2020-12-22 09:45:16,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:45:16,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:45:17,058 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.4.ufo.BOUNDED-8.pals+Problem12_label06.c[8688,8701] [2020-12-22 09:45:17,101 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.4.ufo.BOUNDED-8.pals+Problem12_label06.c[11262,11275] [2020-12-22 09:45:18,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:18,230 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:45:18,305 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.4.ufo.BOUNDED-8.pals+Problem12_label06.c[8688,8701] [2020-12-22 09:45:18,315 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.4.ufo.BOUNDED-8.pals+Problem12_label06.c[11262,11275] [2020-12-22 09:45:18,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:18,988 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:45:18,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18 WrapperNode [2020-12-22 09:45:18,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:18,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:18,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:45:18,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:45:19,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:19,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:19,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:19,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:45:19,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:45:19,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:45:19,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:19,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:19,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:19,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:19,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:19,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:20,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... [2020-12-22 09:45:20,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:45:20,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:45:20,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:45:20,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:45:20,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:45:20,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:45:20,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:45:20,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:45:20,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:45:25,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:45:25,987 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:45:25,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:25 BoogieIcfgContainer [2020-12-22 09:45:25,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:45:25,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:45:25,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:45:25,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:45:25,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:45:16" (1/3) ... [2020-12-22 09:45:25,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca7c046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:25, skipping insertion in model container [2020-12-22 09:45:25,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:18" (2/3) ... [2020-12-22 09:45:26,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca7c046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:25, skipping insertion in model container [2020-12-22 09:45:26,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:25" (3/3) ... [2020-12-22 09:45:26,002 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label06.c [2020-12-22 09:45:26,009 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:45:26,016 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:45:26,037 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:45:26,074 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:45:26,074 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:45:26,074 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:45:26,074 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:45:26,074 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:45:26,074 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:45:26,075 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:45:26,075 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:45:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:45:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 09:45:26,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:26,125 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] [2020-12-22 09:45:26,125 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1211398261, now seen corresponding path program 1 times [2020-12-22 09:45:26,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:26,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770356601] [2020-12-22 09:45:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:26,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770356601] [2020-12-22 09:45:26,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:26,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:45:26,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82480560] [2020-12-22 09:45:26,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:26,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:26,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:26,537 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 3 states. [2020-12-22 09:45:32,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:32,916 INFO L93 Difference]: Finished difference Result 2512 states and 4834 transitions. [2020-12-22 09:45:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:32,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-22 09:45:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:32,961 INFO L225 Difference]: With dead ends: 2512 [2020-12-22 09:45:32,962 INFO L226 Difference]: Without dead ends: 1578 [2020-12-22 09:45:32,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2020-12-22 09:45:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2020-12-22 09:45:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:45:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2899 transitions. [2020-12-22 09:45:33,123 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2899 transitions. Word has length 24 [2020-12-22 09:45:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:33,124 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2899 transitions. [2020-12-22 09:45:33,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2899 transitions. [2020-12-22 09:45:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:33,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:33,129 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] [2020-12-22 09:45:33,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:45:33,129 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:45:33,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:33,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503085663] [2020-12-22 09:45:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:33,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503085663] [2020-12-22 09:45:33,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:33,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:33,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160902746] [2020-12-22 09:45:33,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:33,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:33,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:33,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:33,322 INFO L87 Difference]: Start difference. First operand 1578 states and 2899 transitions. Second operand 5 states. [2020-12-22 09:45:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:33,425 INFO L93 Difference]: Finished difference Result 1670 states and 3041 transitions. [2020-12-22 09:45:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:33,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:45:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:33,436 INFO L225 Difference]: With dead ends: 1670 [2020-12-22 09:45:33,436 INFO L226 Difference]: Without dead ends: 1622 [2020-12-22 09:45:33,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:45:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2020-12-22 09:45:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1578. [2020-12-22 09:45:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-12-22 09:45:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2876 transitions. [2020-12-22 09:45:33,477 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2876 transitions. Word has length 30 [2020-12-22 09:45:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:33,478 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2876 transitions. [2020-12-22 09:45:33,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2876 transitions. [2020-12-22 09:45:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:33,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:33,481 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] [2020-12-22 09:45:33,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:45:33,481 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:33,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:33,482 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:45:33,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:33,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980196481] [2020-12-22 09:45:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:33,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980196481] [2020-12-22 09:45:33,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:33,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:33,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585343460] [2020-12-22 09:45:33,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:33,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:33,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:33,574 INFO L87 Difference]: Start difference. First operand 1578 states and 2876 transitions. Second operand 3 states. [2020-12-22 09:45:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:33,621 INFO L93 Difference]: Finished difference Result 1660 states and 3004 transitions. [2020-12-22 09:45:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:33,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:33,633 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 09:45:33,634 INFO L226 Difference]: Without dead ends: 1616 [2020-12-22 09:45:33,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2020-12-22 09:45:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2020-12-22 09:45:33,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1614 states. [2020-12-22 09:45:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2933 transitions. [2020-12-22 09:45:33,678 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2933 transitions. Word has length 52 [2020-12-22 09:45:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:33,679 INFO L481 AbstractCegarLoop]: Abstraction has 1614 states and 2933 transitions. [2020-12-22 09:45:33,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2933 transitions. [2020-12-22 09:45:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:33,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:33,681 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] [2020-12-22 09:45:33,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:45:33,682 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:33,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:45:33,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:33,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730772521] [2020-12-22 09:45:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:33,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730772521] [2020-12-22 09:45:33,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:33,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:33,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425375035] [2020-12-22 09:45:33,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:33,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:33,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:33,791 INFO L87 Difference]: Start difference. First operand 1614 states and 2933 transitions. Second operand 3 states. [2020-12-22 09:45:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:33,843 INFO L93 Difference]: Finished difference Result 1762 states and 3165 transitions. [2020-12-22 09:45:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:33,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:33,855 INFO L225 Difference]: With dead ends: 1762 [2020-12-22 09:45:33,855 INFO L226 Difference]: Without dead ends: 1682 [2020-12-22 09:45:33,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2020-12-22 09:45:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2020-12-22 09:45:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1680 states. [2020-12-22 09:45:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 3036 transitions. [2020-12-22 09:45:33,908 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 3036 transitions. Word has length 52 [2020-12-22 09:45:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:33,911 INFO L481 AbstractCegarLoop]: Abstraction has 1680 states and 3036 transitions. [2020-12-22 09:45:33,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 3036 transitions. [2020-12-22 09:45:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:33,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:33,919 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] [2020-12-22 09:45:33,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:45:33,920 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:45:33,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:33,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958027649] [2020-12-22 09:45:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:34,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958027649] [2020-12-22 09:45:34,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:34,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907230793] [2020-12-22 09:45:34,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:34,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:34,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,051 INFO L87 Difference]: Start difference. First operand 1680 states and 3036 transitions. Second operand 3 states. [2020-12-22 09:45:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:34,114 INFO L93 Difference]: Finished difference Result 1948 states and 3454 transitions. [2020-12-22 09:45:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:34,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:34,128 INFO L225 Difference]: With dead ends: 1948 [2020-12-22 09:45:34,128 INFO L226 Difference]: Without dead ends: 1802 [2020-12-22 09:45:34,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-12-22 09:45:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-12-22 09:45:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-12-22 09:45:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3220 transitions. [2020-12-22 09:45:34,186 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3220 transitions. Word has length 52 [2020-12-22 09:45:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:34,187 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 3220 transitions. [2020-12-22 09:45:34,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3220 transitions. [2020-12-22 09:45:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:34,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:34,190 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] [2020-12-22 09:45:34,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:45:34,190 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:45:34,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:34,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044287819] [2020-12-22 09:45:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:34,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044287819] [2020-12-22 09:45:34,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:34,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206747222] [2020-12-22 09:45:34,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:34,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:34,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,312 INFO L87 Difference]: Start difference. First operand 1800 states and 3220 transitions. Second operand 3 states. [2020-12-22 09:45:34,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:34,372 INFO L93 Difference]: Finished difference Result 2284 states and 3966 transitions. [2020-12-22 09:45:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:34,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:34,390 INFO L225 Difference]: With dead ends: 2284 [2020-12-22 09:45:34,390 INFO L226 Difference]: Without dead ends: 2018 [2020-12-22 09:45:34,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-12-22 09:45:34,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2020-12-22 09:45:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2020-12-22 09:45:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3544 transitions. [2020-12-22 09:45:34,462 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3544 transitions. Word has length 52 [2020-12-22 09:45:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:34,464 INFO L481 AbstractCegarLoop]: Abstraction has 2016 states and 3544 transitions. [2020-12-22 09:45:34,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3544 transitions. [2020-12-22 09:45:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:34,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:34,465 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] [2020-12-22 09:45:34,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:45:34,467 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:45:34,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:34,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176173115] [2020-12-22 09:45:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:34,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176173115] [2020-12-22 09:45:34,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:34,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:34,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940061459] [2020-12-22 09:45:34,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:34,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:34,617 INFO L87 Difference]: Start difference. First operand 2016 states and 3544 transitions. Second operand 6 states. [2020-12-22 09:45:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:35,082 INFO L93 Difference]: Finished difference Result 5872 states and 9440 transitions. [2020-12-22 09:45:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:45:35,083 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:45:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:35,117 INFO L225 Difference]: With dead ends: 5872 [2020-12-22 09:45:35,117 INFO L226 Difference]: Without dead ends: 5390 [2020-12-22 09:45:35,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:45:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2020-12-22 09:45:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2020-12-22 09:45:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2496 states. [2020-12-22 09:45:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 4248 transitions. [2020-12-22 09:45:35,284 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 4248 transitions. Word has length 52 [2020-12-22 09:45:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:35,284 INFO L481 AbstractCegarLoop]: Abstraction has 2496 states and 4248 transitions. [2020-12-22 09:45:35,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 4248 transitions. [2020-12-22 09:45:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:35,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:35,285 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] [2020-12-22 09:45:35,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:45:35,286 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:45:35,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:35,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179356405] [2020-12-22 09:45:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:35,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179356405] [2020-12-22 09:45:35,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:35,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:35,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633316170] [2020-12-22 09:45:35,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:35,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:35,357 INFO L87 Difference]: Start difference. First operand 2496 states and 4248 transitions. Second operand 3 states. [2020-12-22 09:45:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:35,484 INFO L93 Difference]: Finished difference Result 3902 states and 6348 transitions. [2020-12-22 09:45:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:35,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:45:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:35,503 INFO L225 Difference]: With dead ends: 3902 [2020-12-22 09:45:35,504 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:45:35,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:45:35,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:45:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4882 transitions. [2020-12-22 09:45:35,647 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4882 transitions. Word has length 54 [2020-12-22 09:45:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:35,649 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4882 transitions. [2020-12-22 09:45:35,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:35,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4882 transitions. [2020-12-22 09:45:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:35,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:35,650 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] [2020-12-22 09:45:35,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:45:35,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:45:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:35,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172259183] [2020-12-22 09:45:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:35,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172259183] [2020-12-22 09:45:35,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:35,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:35,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463072096] [2020-12-22 09:45:35,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:35,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:35,869 INFO L87 Difference]: Start difference. First operand 2938 states and 4882 transitions. Second operand 6 states. [2020-12-22 09:45:36,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:36,136 INFO L93 Difference]: Finished difference Result 4342 states and 6956 transitions. [2020-12-22 09:45:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:36,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:45:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:36,158 INFO L225 Difference]: With dead ends: 4342 [2020-12-22 09:45:36,158 INFO L226 Difference]: Without dead ends: 2940 [2020-12-22 09:45:36,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:45:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2020-12-22 09:45:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2020-12-22 09:45:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4858 transitions. [2020-12-22 09:45:36,306 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4858 transitions. Word has length 54 [2020-12-22 09:45:36,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:36,307 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4858 transitions. [2020-12-22 09:45:36,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4858 transitions. [2020-12-22 09:45:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:36,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:36,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:36,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:45:36,308 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:45:36,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:36,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683331958] [2020-12-22 09:45:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:36,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683331958] [2020-12-22 09:45:36,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:36,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:36,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644698571] [2020-12-22 09:45:36,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:36,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:36,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:36,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:36,412 INFO L87 Difference]: Start difference. First operand 2938 states and 4858 transitions. Second operand 6 states. [2020-12-22 09:45:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:36,671 INFO L93 Difference]: Finished difference Result 4340 states and 6907 transitions. [2020-12-22 09:45:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:36,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:36,705 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:45:36,708 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:45:36,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:45:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:45:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4834 transitions. [2020-12-22 09:45:36,927 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4834 transitions. Word has length 55 [2020-12-22 09:45:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:36,928 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4834 transitions. [2020-12-22 09:45:36,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4834 transitions. [2020-12-22 09:45:36,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:36,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:36,929 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] [2020-12-22 09:45:36,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:45:36,929 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:36,930 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:45:36,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:36,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942341144] [2020-12-22 09:45:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:37,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942341144] [2020-12-22 09:45:37,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:37,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:37,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879562125] [2020-12-22 09:45:37,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:37,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:37,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:37,020 INFO L87 Difference]: Start difference. First operand 2938 states and 4834 transitions. Second operand 6 states. [2020-12-22 09:45:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:37,278 INFO L93 Difference]: Finished difference Result 4340 states and 6859 transitions. [2020-12-22 09:45:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:37,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:37,287 INFO L225 Difference]: With dead ends: 4340 [2020-12-22 09:45:37,288 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 09:45:37,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 09:45:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 09:45:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 09:45:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4810 transitions. [2020-12-22 09:45:37,453 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4810 transitions. Word has length 55 [2020-12-22 09:45:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:37,453 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 4810 transitions. [2020-12-22 09:45:37,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4810 transitions. [2020-12-22 09:45:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:37,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:37,454 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] [2020-12-22 09:45:37,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:45:37,454 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:45:37,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:37,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958635419] [2020-12-22 09:45:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:37,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958635419] [2020-12-22 09:45:37,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:37,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:37,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154041918] [2020-12-22 09:45:37,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:37,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:37,541 INFO L87 Difference]: Start difference. First operand 2938 states and 4810 transitions. Second operand 5 states. [2020-12-22 09:45:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:37,846 INFO L93 Difference]: Finished difference Result 4169 states and 6508 transitions. [2020-12-22 09:45:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:45:37,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:45:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:37,857 INFO L225 Difference]: With dead ends: 4169 [2020-12-22 09:45:37,857 INFO L226 Difference]: Without dead ends: 4167 [2020-12-22 09:45:37,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:45:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2020-12-22 09:45:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2020-12-22 09:45:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:45:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4898 transitions. [2020-12-22 09:45:38,054 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4898 transitions. Word has length 55 [2020-12-22 09:45:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:38,054 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4898 transitions. [2020-12-22 09:45:38,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4898 transitions. [2020-12-22 09:45:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:38,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:38,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:38,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:45:38,065 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:45:38,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:38,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373123164] [2020-12-22 09:45:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:45:38,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373123164] [2020-12-22 09:45:38,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:38,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:38,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853745] [2020-12-22 09:45:38,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:38,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:38,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:38,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:38,191 INFO L87 Difference]: Start difference. First operand 3034 states and 4898 transitions. Second operand 6 states. [2020-12-22 09:45:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:38,908 INFO L93 Difference]: Finished difference Result 9340 states and 13667 transitions. [2020-12-22 09:45:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:38,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:38,928 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:45:38,928 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:45:38,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:45:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:45:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:45:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6962 transitions. [2020-12-22 09:45:39,298 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6962 transitions. Word has length 79 [2020-12-22 09:45:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:39,298 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6962 transitions. [2020-12-22 09:45:39,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:39,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6962 transitions. [2020-12-22 09:45:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:39,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:39,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:39,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:45:39,302 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:45:39,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:39,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407916671] [2020-12-22 09:45:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:45:39,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407916671] [2020-12-22 09:45:39,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:39,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:39,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031602141] [2020-12-22 09:45:39,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:39,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:39,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:39,410 INFO L87 Difference]: Start difference. First operand 4530 states and 6962 transitions. Second operand 6 states. [2020-12-22 09:45:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:40,238 INFO L93 Difference]: Finished difference Result 10836 states and 15731 transitions. [2020-12-22 09:45:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:40,239 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:40,264 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:45:40,265 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:45:40,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:45:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:45:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:45:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 10038 transitions. [2020-12-22 09:45:40,819 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 10038 transitions. Word has length 79 [2020-12-22 09:45:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:40,820 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 10038 transitions. [2020-12-22 09:45:40,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 10038 transitions. [2020-12-22 09:45:40,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:40,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:40,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:40,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:45:40,824 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:45:40,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:40,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199706580] [2020-12-22 09:45:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:45:40,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199706580] [2020-12-22 09:45:40,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:40,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:40,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854981978] [2020-12-22 09:45:40,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:40,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:40,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:40,927 INFO L87 Difference]: Start difference. First operand 6778 states and 10038 transitions. Second operand 6 states. [2020-12-22 09:45:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:41,840 INFO L93 Difference]: Finished difference Result 12332 states and 17795 transitions. [2020-12-22 09:45:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:41,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:41,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:41,865 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:45:41,866 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:45:41,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:41,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:45:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:45:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:45:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12102 transitions. [2020-12-22 09:45:42,525 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12102 transitions. Word has length 79 [2020-12-22 09:45:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:42,526 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12102 transitions. [2020-12-22 09:45:42,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12102 transitions. [2020-12-22 09:45:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:42,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:42,530 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:42,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:45:42,530 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:42,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:45:42,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:42,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317766520] [2020-12-22 09:45:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:45:42,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317766520] [2020-12-22 09:45:42,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:42,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:42,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784690678] [2020-12-22 09:45:42,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:42,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:42,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:42,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:42,631 INFO L87 Difference]: Start difference. First operand 8274 states and 12102 transitions. Second operand 6 states. [2020-12-22 09:45:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:43,692 INFO L93 Difference]: Finished difference Result 12948 states and 18659 transitions. [2020-12-22 09:45:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:43,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:43,721 INFO L225 Difference]: With dead ends: 12948 [2020-12-22 09:45:43,721 INFO L226 Difference]: Without dead ends: 11890 [2020-12-22 09:45:43,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:43,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2020-12-22 09:45:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2020-12-22 09:45:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9330 states. [2020-12-22 09:45:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13574 transitions. [2020-12-22 09:45:44,446 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13574 transitions. Word has length 79 [2020-12-22 09:45:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:44,447 INFO L481 AbstractCegarLoop]: Abstraction has 9330 states and 13574 transitions. [2020-12-22 09:45:44,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:44,447 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13574 transitions. [2020-12-22 09:45:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:45:44,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:44,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:44,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:45:44,451 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:45:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:44,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858425274] [2020-12-22 09:45:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:44,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858425274] [2020-12-22 09:45:44,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723971931] [2020-12-22 09:45:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:45:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:44,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:45:44,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:45,133 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:45,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:45,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:45:45,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474102261] [2020-12-22 09:45:45,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:45:45,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:45,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:45:45,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:45:45,506 INFO L87 Difference]: Start difference. First operand 9330 states and 13574 transitions. Second operand 18 states. [2020-12-22 09:45:45,633 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:48,931 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:49,518 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:51,063 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:55,349 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 09:45:55,519 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:55,678 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:56,489 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:45:56,877 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:57,556 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:45:58,955 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:59,584 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:59,712 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:00,023 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:03,971 INFO L93 Difference]: Finished difference Result 85950 states and 117669 transitions. [2020-12-22 09:46:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:46:03,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:46:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:04,159 INFO L225 Difference]: With dead ends: 85950 [2020-12-22 09:46:04,159 INFO L226 Difference]: Without dead ends: 78156 [2020-12-22 09:46:04,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:46:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78156 states. [2020-12-22 09:46:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78156 to 35946. [2020-12-22 09:46:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35946 states. [2020-12-22 09:46:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35946 states to 35946 states and 50092 transitions. [2020-12-22 09:46:08,089 INFO L78 Accepts]: Start accepts. Automaton has 35946 states and 50092 transitions. Word has length 80 [2020-12-22 09:46:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:08,089 INFO L481 AbstractCegarLoop]: Abstraction has 35946 states and 50092 transitions. [2020-12-22 09:46:08,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:46:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 35946 states and 50092 transitions. [2020-12-22 09:46:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:08,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:08,096 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:08,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:46:08,298 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:08,369 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:46:08,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:08,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014998722] [2020-12-22 09:46:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:08,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014998722] [2020-12-22 09:46:08,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:08,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:08,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522572300] [2020-12-22 09:46:08,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:08,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:08,456 INFO L87 Difference]: Start difference. First operand 35946 states and 50092 transitions. Second operand 3 states. [2020-12-22 09:46:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:11,444 INFO L93 Difference]: Finished difference Result 70358 states and 97376 transitions. [2020-12-22 09:46:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:11,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:11,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:11,508 INFO L225 Difference]: With dead ends: 70358 [2020-12-22 09:46:11,508 INFO L226 Difference]: Without dead ends: 35948 [2020-12-22 09:46:11,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35948 states. [2020-12-22 09:46:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35948 to 34986. [2020-12-22 09:46:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34986 states. [2020-12-22 09:46:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34986 states to 34986 states and 48052 transitions. [2020-12-22 09:46:14,418 INFO L78 Accepts]: Start accepts. Automaton has 34986 states and 48052 transitions. Word has length 81 [2020-12-22 09:46:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:14,418 INFO L481 AbstractCegarLoop]: Abstraction has 34986 states and 48052 transitions. [2020-12-22 09:46:14,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 34986 states and 48052 transitions. [2020-12-22 09:46:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:14,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:14,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:14,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:46:14,422 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:46:14,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:14,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742563314] [2020-12-22 09:46:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:14,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742563314] [2020-12-22 09:46:14,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130854347] [2020-12-22 09:46:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:46:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:46:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:15,227 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:15,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:15,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:46:15,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841868513] [2020-12-22 09:46:15,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:46:15,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:46:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:46:15,670 INFO L87 Difference]: Start difference. First operand 34986 states and 48052 transitions. Second operand 19 states. [2020-12-22 09:46:15,877 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:16,036 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:46:16,200 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:46:16,363 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:46:16,532 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:17,084 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:18,381 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:18,621 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:18,878 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:19,502 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:22,616 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:23,392 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:23,909 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:24,509 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:24,751 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:25,099 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:26,110 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:26,486 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:26,682 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:27,111 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:29,174 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:29,538 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:34,965 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:35,507 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:35,675 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:36,275 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:36,561 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:37,533 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:37,721 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:46,621 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:47,241 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:51,125 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:51,597 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:47:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:01,492 INFO L93 Difference]: Finished difference Result 372069 states and 495322 transitions. [2020-12-22 09:47:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:47:01,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:47:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:02,497 INFO L225 Difference]: With dead ends: 372069 [2020-12-22 09:47:02,497 INFO L226 Difference]: Without dead ends: 338619 [2020-12-22 09:47:02,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:47:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338619 states. [2020-12-22 09:47:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338619 to 166484. [2020-12-22 09:47:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166484 states. [2020-12-22 09:47:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166484 states to 166484 states and 224172 transitions. [2020-12-22 09:47:20,367 INFO L78 Accepts]: Start accepts. Automaton has 166484 states and 224172 transitions. Word has length 81 [2020-12-22 09:47:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:20,367 INFO L481 AbstractCegarLoop]: Abstraction has 166484 states and 224172 transitions. [2020-12-22 09:47:20,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:47:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 166484 states and 224172 transitions. [2020-12-22 09:47:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:20,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:20,375 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] [2020-12-22 09:47:20,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:20,590 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:20,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:47:20,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:20,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795639673] [2020-12-22 09:47:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:21,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795639673] [2020-12-22 09:47:21,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:21,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:21,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140705233] [2020-12-22 09:47:21,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:21,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:21,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:21,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:21,022 INFO L87 Difference]: Start difference. First operand 166484 states and 224172 transitions. Second operand 3 states. [2020-12-22 09:47:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:30,063 INFO L93 Difference]: Finished difference Result 258048 states and 346688 transitions. [2020-12-22 09:47:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:30,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:30,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:30,232 INFO L225 Difference]: With dead ends: 258048 [2020-12-22 09:47:30,233 INFO L226 Difference]: Without dead ends: 93100 [2020-12-22 09:47:30,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93100 states. [2020-12-22 09:47:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93100 to 93098. [2020-12-22 09:47:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93098 states. [2020-12-22 09:47:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93098 states to 93098 states and 123628 transitions. [2020-12-22 09:47:39,402 INFO L78 Accepts]: Start accepts. Automaton has 93098 states and 123628 transitions. Word has length 81 [2020-12-22 09:47:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:39,402 INFO L481 AbstractCegarLoop]: Abstraction has 93098 states and 123628 transitions. [2020-12-22 09:47:39,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 93098 states and 123628 transitions. [2020-12-22 09:47:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:39,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:39,408 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] [2020-12-22 09:47:39,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:47:39,408 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:47:39,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:39,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708804] [2020-12-22 09:47:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:39,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708804] [2020-12-22 09:47:39,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:39,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:39,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974686847] [2020-12-22 09:47:39,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:39,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:39,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:39,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:39,459 INFO L87 Difference]: Start difference. First operand 93098 states and 123628 transitions. Second operand 3 states. [2020-12-22 09:47:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:43,394 INFO L93 Difference]: Finished difference Result 135079 states and 179496 transitions. [2020-12-22 09:47:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:43,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:43,446 INFO L225 Difference]: With dead ends: 135079 [2020-12-22 09:47:43,446 INFO L226 Difference]: Without dead ends: 43517 [2020-12-22 09:47:43,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43517 states. [2020-12-22 09:47:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43517 to 43491. [2020-12-22 09:47:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43491 states. [2020-12-22 09:47:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43491 states to 43491 states and 57856 transitions. [2020-12-22 09:47:47,544 INFO L78 Accepts]: Start accepts. Automaton has 43491 states and 57856 transitions. Word has length 81 [2020-12-22 09:47:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:47,544 INFO L481 AbstractCegarLoop]: Abstraction has 43491 states and 57856 transitions. [2020-12-22 09:47:47,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 43491 states and 57856 transitions. [2020-12-22 09:47:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:47,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:47,549 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] [2020-12-22 09:47:47,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:47:47,550 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:47:47,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:47,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516408654] [2020-12-22 09:47:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:47:47,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516408654] [2020-12-22 09:47:47,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:47,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:47,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064835416] [2020-12-22 09:47:47,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:47,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:47,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:47,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:47,624 INFO L87 Difference]: Start difference. First operand 43491 states and 57856 transitions. Second operand 6 states. [2020-12-22 09:47:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:50,533 INFO L93 Difference]: Finished difference Result 66813 states and 88426 transitions. [2020-12-22 09:47:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:50,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:50,567 INFO L225 Difference]: With dead ends: 66813 [2020-12-22 09:47:50,567 INFO L226 Difference]: Without dead ends: 24895 [2020-12-22 09:47:50,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24895 states. [2020-12-22 09:47:52,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24895 to 24895. [2020-12-22 09:47:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24895 states. [2020-12-22 09:47:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24895 states to 24895 states and 33021 transitions. [2020-12-22 09:47:52,923 INFO L78 Accepts]: Start accepts. Automaton has 24895 states and 33021 transitions. Word has length 81 [2020-12-22 09:47:52,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:52,923 INFO L481 AbstractCegarLoop]: Abstraction has 24895 states and 33021 transitions. [2020-12-22 09:47:52,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 24895 states and 33021 transitions. [2020-12-22 09:47:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:52,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:52,926 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] [2020-12-22 09:47:52,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:47:52,927 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:47:52,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:52,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495610688] [2020-12-22 09:47:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:47:53,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495610688] [2020-12-22 09:47:53,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:53,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:53,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173719985] [2020-12-22 09:47:53,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:53,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:53,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:53,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:53,009 INFO L87 Difference]: Start difference. First operand 24895 states and 33021 transitions. Second operand 6 states. [2020-12-22 09:47:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:55,107 INFO L93 Difference]: Finished difference Result 43465 states and 57156 transitions. [2020-12-22 09:47:55,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:55,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:55,129 INFO L225 Difference]: With dead ends: 43465 [2020-12-22 09:47:55,129 INFO L226 Difference]: Without dead ends: 20125 [2020-12-22 09:47:55,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20125 states. [2020-12-22 09:47:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20125 to 20125. [2020-12-22 09:47:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20125 states. [2020-12-22 09:47:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20125 states to 20125 states and 26699 transitions. [2020-12-22 09:47:57,128 INFO L78 Accepts]: Start accepts. Automaton has 20125 states and 26699 transitions. Word has length 81 [2020-12-22 09:47:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:57,129 INFO L481 AbstractCegarLoop]: Abstraction has 20125 states and 26699 transitions. [2020-12-22 09:47:57,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 20125 states and 26699 transitions. [2020-12-22 09:47:57,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:47:57,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:57,132 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] [2020-12-22 09:47:57,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:47:57,132 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:57,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:47:57,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:57,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418347005] [2020-12-22 09:47:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:57,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418347005] [2020-12-22 09:47:57,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:57,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:57,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099136183] [2020-12-22 09:47:57,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:57,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:57,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:57,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:57,185 INFO L87 Difference]: Start difference. First operand 20125 states and 26699 transitions. Second operand 3 states. [2020-12-22 09:47:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:58,260 INFO L93 Difference]: Finished difference Result 29501 states and 38669 transitions. [2020-12-22 09:47:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:58,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:47:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:58,277 INFO L225 Difference]: With dead ends: 29501 [2020-12-22 09:47:58,278 INFO L226 Difference]: Without dead ends: 10931 [2020-12-22 09:47:58,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10931 states. [2020-12-22 09:47:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10931 to 10929. [2020-12-22 09:47:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10929 states. [2020-12-22 09:47:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10929 states to 10929 states and 14621 transitions. [2020-12-22 09:47:59,308 INFO L78 Accepts]: Start accepts. Automaton has 10929 states and 14621 transitions. Word has length 82 [2020-12-22 09:47:59,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:59,308 INFO L481 AbstractCegarLoop]: Abstraction has 10929 states and 14621 transitions. [2020-12-22 09:47:59,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 10929 states and 14621 transitions. [2020-12-22 09:47:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:47:59,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:59,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:59,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:47:59,310 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:59,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:47:59,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:59,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615044331] [2020-12-22 09:47:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:59,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615044331] [2020-12-22 09:47:59,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436989013] [2020-12-22 09:47:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:00,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:48:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:01,928 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:48:02,268 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:48:02,501 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:02,790 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:02,808 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:48:03,230 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:48:03,498 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:48:03,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:48:03,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:03,568 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:03,580 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:03,582 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:03,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:03,597 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:03,599 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:04,678 WARN L197 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:48:05,118 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:48:05,549 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:48:05,565 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:05,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:09,219 WARN L197 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:48:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:09,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:09,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:48:09,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163815834] [2020-12-22 09:48:09,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:48:09,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:09,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:48:09,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:48:09,780 INFO L87 Difference]: Start difference. First operand 10929 states and 14621 transitions. Second operand 39 states. [2020-12-22 09:48:11,466 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:48:11,678 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:48:11,927 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:48:12,270 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:48:12,790 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:48:13,166 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:48:13,548 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:48:13,960 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:48:14,464 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:48:15,008 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:48:15,603 WARN L197 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:48:16,174 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:48:16,754 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:48:17,462 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:48:18,245 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:48:19,762 WARN L197 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:48:20,521 WARN L197 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:48:22,030 WARN L197 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:48:23,009 WARN L197 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:48:23,724 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:48:24,348 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:48:24,608 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:25,294 WARN L197 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:48:25,827 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:48:26,302 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:48:26,690 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:28,485 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:48:28,764 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:29,276 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:30,675 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:48:31,412 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:48:31,966 WARN L197 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:48:32,431 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:48:33,674 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 09:48:34,087 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 09:48:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:36,857 INFO L93 Difference]: Finished difference Result 24470 states and 31250 transitions. [2020-12-22 09:48:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:48:36,859 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:48:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:36,880 INFO L225 Difference]: With dead ends: 24470 [2020-12-22 09:48:36,881 INFO L226 Difference]: Without dead ends: 21060 [2020-12-22 09:48:36,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:48:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21060 states. [2020-12-22 09:48:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21060 to 10381. [2020-12-22 09:48:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10381 states. [2020-12-22 09:48:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10381 states to 10381 states and 13893 transitions. [2020-12-22 09:48:37,988 INFO L78 Accepts]: Start accepts. Automaton has 10381 states and 13893 transitions. Word has length 83 [2020-12-22 09:48:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:37,988 INFO L481 AbstractCegarLoop]: Abstraction has 10381 states and 13893 transitions. [2020-12-22 09:48:37,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:48:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 10381 states and 13893 transitions. [2020-12-22 09:48:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:37,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:37,990 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:38,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 09:48:38,205 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:48:38,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:38,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979271475] [2020-12-22 09:48:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:38,741 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:48:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:39,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979271475] [2020-12-22 09:48:39,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782153089] [2020-12-22 09:48:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:39,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:48:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:40,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:40,754 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-12-22 09:48:41,157 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:48:41,418 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:48:41,849 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 09:48:41,860 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:42,258 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:48:42,563 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:42,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:42,571 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:42,968 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:48:43,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:43,201 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:43,202 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:43,204 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:43,888 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-12-22 09:48:44,555 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:48:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:44,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:44,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2020-12-22 09:48:44,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564755696] [2020-12-22 09:48:44,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 09:48:44,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:44,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 09:48:44,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:48:44,680 INFO L87 Difference]: Start difference. First operand 10381 states and 13893 transitions. Second operand 37 states. [2020-12-22 09:48:44,883 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-12-22 09:48:46,188 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-12-22 09:48:46,484 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-12-22 09:48:46,834 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-12-22 09:48:47,144 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2020-12-22 09:48:47,504 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-12-22 09:48:47,996 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2020-12-22 09:48:48,570 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-12-22 09:48:49,168 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 67 [2020-12-22 09:48:49,841 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-12-22 09:48:50,497 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:51,133 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-12-22 09:48:51,880 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-12-22 09:48:52,835 WARN L197 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2020-12-22 09:48:53,661 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2020-12-22 09:48:54,244 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:48:54,841 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-12-22 09:48:55,210 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 09:48:55,913 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2020-12-22 09:48:56,251 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-12-22 09:48:57,194 WARN L197 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-22 09:48:58,095 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 09:48:58,527 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 09:48:58,964 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 09:48:59,487 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:48:59,859 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 09:49:00,282 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-12-22 09:49:00,765 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-12-22 09:49:01,442 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:49:01,809 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:49:02,379 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33