/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:40:40,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:40:40,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:40:40,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:40:40,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:40:40,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:40:40,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:40:40,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:40:40,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:40:40,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:40:40,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:40:40,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:40:40,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:40:40,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:40:40,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:40:40,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:40:40,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:40:40,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:40:40,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:40:40,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:40:40,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:40:40,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:40:40,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:40:40,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:40:40,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:40:40,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:40:40,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:40:40,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:40:40,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:40:40,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:40:40,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:40:40,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:40:40,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:40:40,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:40:40,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:40:40,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:40:40,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:40:40,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:40:40,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:40:40,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:40:40,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:40:40,396 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:40:40,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:40:40,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:40:40,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:40:40,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:40:40,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:40:40,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:40:40,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:40:40,398 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:40:40,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:40:40,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:40:40,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:40:40,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:40:40,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:40:40,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:40:40,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:40:40,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:40:40,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:40:40,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:40:40,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:40:40,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:40:40,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:40:40,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:40:40,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:40:40,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:40:40,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:40:40,865 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:40:40,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:40:40,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a44ef848/d691c9e25f8c408c997e6c882183380d/FLAGd0cd6092e [2020-12-22 08:40:41,711 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:40:41,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:40:41,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a44ef848/d691c9e25f8c408c997e6c882183380d/FLAGd0cd6092e [2020-12-22 08:40:42,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a44ef848/d691c9e25f8c408c997e6c882183380d [2020-12-22 08:40:42,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:40:42,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:40:42,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:40:42,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:40:42,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:40:42,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b84b9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42, skipping insertion in model container [2020-12-22 08:40:42,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:40:42,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:40:42,383 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4536,4549] [2020-12-22 08:40:42,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:40:42,468 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:40:42,547 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4536,4549] [2020-12-22 08:40:42,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:40:42,626 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:40:42,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42 WrapperNode [2020-12-22 08:40:42,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:40:42,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:40:42,630 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:40:42,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:40:42,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:40:42,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:40:42,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:40:42,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:40:42,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (1/1) ... [2020-12-22 08:40:42,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:40:42,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:40:42,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:40:42,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:40:42,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (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 08:40:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:40:43,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:40:43,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:40:43,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:40:43,878 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:40:43,878 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:40:43,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:40:43 BoogieIcfgContainer [2020-12-22 08:40:43,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:40:43,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:40:43,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:40:43,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:40:43,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:40:42" (1/3) ... [2020-12-22 08:40:43,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f80a3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:40:43, skipping insertion in model container [2020-12-22 08:40:43,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:40:42" (2/3) ... [2020-12-22 08:40:43,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f80a3c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:40:43, skipping insertion in model container [2020-12-22 08:40:43,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:40:43" (3/3) ... [2020-12-22 08:40:43,894 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:40:43,909 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:40:43,925 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:40:43,975 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:40:44,009 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:40:44,009 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:40:44,009 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:40:44,010 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:40:44,010 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:40:44,010 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:40:44,010 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:40:44,010 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:40:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states. [2020-12-22 08:40:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:40:44,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:44,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:40:44,043 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash 377049112, now seen corresponding path program 1 times [2020-12-22 08:40:44,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:44,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761712216] [2020-12-22 08:40:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:44,500 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 08:40:44,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761712216] [2020-12-22 08:40:44,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:44,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:40:44,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571371448] [2020-12-22 08:40:44,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:40:44,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:44,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:40:44,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:44,533 INFO L87 Difference]: Start difference. First operand 81 states. Second operand 3 states. [2020-12-22 08:40:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:44,615 INFO L93 Difference]: Finished difference Result 183 states and 292 transitions. [2020-12-22 08:40:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:40:44,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:40:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:44,632 INFO L225 Difference]: With dead ends: 183 [2020-12-22 08:40:44,633 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 08:40:44,637 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 08:40:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 08:40:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-12-22 08:40:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 08:40:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 175 transitions. [2020-12-22 08:40:44,737 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 175 transitions. Word has length 48 [2020-12-22 08:40:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:44,739 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 175 transitions. [2020-12-22 08:40:44,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:40:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 175 transitions. [2020-12-22 08:40:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 08:40:44,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:44,743 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] [2020-12-22 08:40:44,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:40:44,745 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash 292717965, now seen corresponding path program 1 times [2020-12-22 08:40:44,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:44,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135125527] [2020-12-22 08:40:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:44,971 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 08:40:44,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135125527] [2020-12-22 08:40:44,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:44,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:40:44,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946481431] [2020-12-22 08:40:44,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:40:44,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:40:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:44,979 INFO L87 Difference]: Start difference. First operand 120 states and 175 transitions. Second operand 3 states. [2020-12-22 08:40:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:45,083 INFO L93 Difference]: Finished difference Result 292 states and 447 transitions. [2020-12-22 08:40:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:40:45,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 49 [2020-12-22 08:40:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:45,092 INFO L225 Difference]: With dead ends: 292 [2020-12-22 08:40:45,093 INFO L226 Difference]: Without dead ends: 198 [2020-12-22 08:40:45,096 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 08:40:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-22 08:40:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2020-12-22 08:40:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-22 08:40:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 295 transitions. [2020-12-22 08:40:45,168 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 295 transitions. Word has length 49 [2020-12-22 08:40:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:45,169 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 295 transitions. [2020-12-22 08:40:45,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:40:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 295 transitions. [2020-12-22 08:40:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:40:45,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:45,176 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] [2020-12-22 08:40:45,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:40:45,177 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash -875864605, now seen corresponding path program 1 times [2020-12-22 08:40:45,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:45,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68911784] [2020-12-22 08:40:45,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:40:45,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68911784] [2020-12-22 08:40:45,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:45,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:40:45,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959262456] [2020-12-22 08:40:45,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:40:45,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:45,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:40:45,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:45,328 INFO L87 Difference]: Start difference. First operand 196 states and 295 transitions. Second operand 3 states. [2020-12-22 08:40:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:45,410 INFO L93 Difference]: Finished difference Result 504 states and 781 transitions. [2020-12-22 08:40:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:40:45,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:40:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:45,414 INFO L225 Difference]: With dead ends: 504 [2020-12-22 08:40:45,414 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 08:40:45,415 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 08:40:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 08:40:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2020-12-22 08:40:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-12-22 08:40:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 507 transitions. [2020-12-22 08:40:45,455 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 507 transitions. Word has length 50 [2020-12-22 08:40:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:45,456 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 507 transitions. [2020-12-22 08:40:45,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:40:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 507 transitions. [2020-12-22 08:40:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:40:45,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:45,458 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] [2020-12-22 08:40:45,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:40:45,459 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:45,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1524907140, now seen corresponding path program 1 times [2020-12-22 08:40:45,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:45,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001499865] [2020-12-22 08:40:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:45,682 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 08:40:45,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001499865] [2020-12-22 08:40:45,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:45,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:40:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18550930] [2020-12-22 08:40:45,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:45,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:45,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:45,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:45,689 INFO L87 Difference]: Start difference. First operand 332 states and 507 transitions. Second operand 6 states. [2020-12-22 08:40:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:45,933 INFO L93 Difference]: Finished difference Result 940 states and 1461 transitions. [2020-12-22 08:40:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:40:45,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 08:40:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:45,939 INFO L225 Difference]: With dead ends: 940 [2020-12-22 08:40:45,939 INFO L226 Difference]: Without dead ends: 634 [2020-12-22 08:40:45,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:40:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-12-22 08:40:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 632. [2020-12-22 08:40:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2020-12-22 08:40:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 975 transitions. [2020-12-22 08:40:45,999 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 975 transitions. Word has length 51 [2020-12-22 08:40:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:46,000 INFO L481 AbstractCegarLoop]: Abstraction has 632 states and 975 transitions. [2020-12-22 08:40:46,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 975 transitions. [2020-12-22 08:40:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:40:46,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:46,002 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] [2020-12-22 08:40:46,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:40:46,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1496192151, now seen corresponding path program 1 times [2020-12-22 08:40:46,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:46,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920378207] [2020-12-22 08:40:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:46,088 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 08:40:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920378207] [2020-12-22 08:40:46,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:46,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:40:46,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141429495] [2020-12-22 08:40:46,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:40:46,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:40:46,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:40:46,092 INFO L87 Difference]: Start difference. First operand 632 states and 975 transitions. Second operand 5 states. [2020-12-22 08:40:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:46,224 INFO L93 Difference]: Finished difference Result 1238 states and 1924 transitions. [2020-12-22 08:40:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:40:46,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 08:40:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:46,230 INFO L225 Difference]: With dead ends: 1238 [2020-12-22 08:40:46,230 INFO L226 Difference]: Without dead ends: 632 [2020-12-22 08:40:46,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:40:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-12-22 08:40:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2020-12-22 08:40:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2020-12-22 08:40:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 967 transitions. [2020-12-22 08:40:46,306 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 967 transitions. Word has length 51 [2020-12-22 08:40:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:46,307 INFO L481 AbstractCegarLoop]: Abstraction has 632 states and 967 transitions. [2020-12-22 08:40:46,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:40:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 967 transitions. [2020-12-22 08:40:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:40:46,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:46,308 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] [2020-12-22 08:40:46,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:40:46,309 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash 956744612, now seen corresponding path program 1 times [2020-12-22 08:40:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:46,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003376431] [2020-12-22 08:40:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:40:46,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003376431] [2020-12-22 08:40:46,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:46,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:40:46,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281630649] [2020-12-22 08:40:46,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:40:46,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:40:46,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:40:46,385 INFO L87 Difference]: Start difference. First operand 632 states and 967 transitions. Second operand 5 states. [2020-12-22 08:40:46,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:46,553 INFO L93 Difference]: Finished difference Result 1238 states and 1908 transitions. [2020-12-22 08:40:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:40:46,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 08:40:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:46,559 INFO L225 Difference]: With dead ends: 1238 [2020-12-22 08:40:46,559 INFO L226 Difference]: Without dead ends: 632 [2020-12-22 08:40:46,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:40:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-12-22 08:40:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2020-12-22 08:40:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2020-12-22 08:40:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 959 transitions. [2020-12-22 08:40:46,654 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 959 transitions. Word has length 51 [2020-12-22 08:40:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:46,654 INFO L481 AbstractCegarLoop]: Abstraction has 632 states and 959 transitions. [2020-12-22 08:40:46,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:40:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 959 transitions. [2020-12-22 08:40:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:40:46,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:46,656 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] [2020-12-22 08:40:46,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:40:46,657 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:46,658 INFO L82 PathProgramCache]: Analyzing trace with hash -490284983, now seen corresponding path program 1 times [2020-12-22 08:40:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:46,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140938616] [2020-12-22 08:40:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:46,840 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 08:40:46,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140938616] [2020-12-22 08:40:46,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:46,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:46,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201047420] [2020-12-22 08:40:46,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:46,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:46,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:46,856 INFO L87 Difference]: Start difference. First operand 632 states and 959 transitions. Second operand 6 states. [2020-12-22 08:40:47,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:47,562 INFO L93 Difference]: Finished difference Result 5480 states and 8423 transitions. [2020-12-22 08:40:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:40:47,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 08:40:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:47,599 INFO L225 Difference]: With dead ends: 5480 [2020-12-22 08:40:47,600 INFO L226 Difference]: Without dead ends: 4874 [2020-12-22 08:40:47,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:40:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2020-12-22 08:40:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 1236. [2020-12-22 08:40:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1236 states. [2020-12-22 08:40:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1859 transitions. [2020-12-22 08:40:47,904 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1859 transitions. Word has length 51 [2020-12-22 08:40:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:47,906 INFO L481 AbstractCegarLoop]: Abstraction has 1236 states and 1859 transitions. [2020-12-22 08:40:47,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1859 transitions. [2020-12-22 08:40:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:40:47,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:47,915 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] [2020-12-22 08:40:47,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:40:47,915 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 381714532, now seen corresponding path program 1 times [2020-12-22 08:40:47,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:47,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527380459] [2020-12-22 08:40:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:48,245 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 08:40:48,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527380459] [2020-12-22 08:40:48,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:48,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:48,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95252450] [2020-12-22 08:40:48,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:48,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:48,249 INFO L87 Difference]: Start difference. First operand 1236 states and 1859 transitions. Second operand 6 states. [2020-12-22 08:40:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:48,753 INFO L93 Difference]: Finished difference Result 3660 states and 5559 transitions. [2020-12-22 08:40:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:48,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-12-22 08:40:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:48,770 INFO L225 Difference]: With dead ends: 3660 [2020-12-22 08:40:48,771 INFO L226 Difference]: Without dead ends: 2450 [2020-12-22 08:40:48,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2020-12-22 08:40:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 1236. [2020-12-22 08:40:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1236 states. [2020-12-22 08:40:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1843 transitions. [2020-12-22 08:40:49,008 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1843 transitions. Word has length 53 [2020-12-22 08:40:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:49,009 INFO L481 AbstractCegarLoop]: Abstraction has 1236 states and 1843 transitions. [2020-12-22 08:40:49,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:49,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1843 transitions. [2020-12-22 08:40:49,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:40:49,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:49,011 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] [2020-12-22 08:40:49,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:40:49,011 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:49,012 INFO L82 PathProgramCache]: Analyzing trace with hash 360711877, now seen corresponding path program 1 times [2020-12-22 08:40:49,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:49,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027976268] [2020-12-22 08:40:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:49,076 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 08:40:49,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027976268] [2020-12-22 08:40:49,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:49,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:40:49,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146263250] [2020-12-22 08:40:49,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:40:49,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:49,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:40:49,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:49,080 INFO L87 Difference]: Start difference. First operand 1236 states and 1843 transitions. Second operand 3 states. [2020-12-22 08:40:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:49,426 INFO L93 Difference]: Finished difference Result 3480 states and 5173 transitions. [2020-12-22 08:40:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:40:49,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-22 08:40:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:49,439 INFO L225 Difference]: With dead ends: 3480 [2020-12-22 08:40:49,440 INFO L226 Difference]: Without dead ends: 2270 [2020-12-22 08:40:49,444 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 08:40:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2020-12-22 08:40:49,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2236. [2020-12-22 08:40:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2236 states. [2020-12-22 08:40:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 3243 transitions. [2020-12-22 08:40:49,765 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 3243 transitions. Word has length 53 [2020-12-22 08:40:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:49,766 INFO L481 AbstractCegarLoop]: Abstraction has 2236 states and 3243 transitions. [2020-12-22 08:40:49,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:40:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 3243 transitions. [2020-12-22 08:40:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:40:49,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:49,767 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 08:40:49,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:40:49,768 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:49,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1053660785, now seen corresponding path program 1 times [2020-12-22 08:40:49,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:49,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743993846] [2020-12-22 08:40:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:49,863 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 08:40:49,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743993846] [2020-12-22 08:40:49,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:49,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:40:49,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899062158] [2020-12-22 08:40:49,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:40:49,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:49,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:40:49,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:40:49,871 INFO L87 Difference]: Start difference. First operand 2236 states and 3243 transitions. Second operand 5 states. [2020-12-22 08:40:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:50,423 INFO L93 Difference]: Finished difference Result 3772 states and 5470 transitions. [2020-12-22 08:40:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:50,424 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:40:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:50,450 INFO L225 Difference]: With dead ends: 3772 [2020-12-22 08:40:50,451 INFO L226 Difference]: Without dead ends: 3770 [2020-12-22 08:40:50,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2020-12-22 08:40:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2300. [2020-12-22 08:40:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2300 states. [2020-12-22 08:40:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3291 transitions. [2020-12-22 08:40:50,846 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3291 transitions. Word has length 54 [2020-12-22 08:40:50,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:50,847 INFO L481 AbstractCegarLoop]: Abstraction has 2300 states and 3291 transitions. [2020-12-22 08:40:50,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:40:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3291 transitions. [2020-12-22 08:40:50,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:40:50,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:50,848 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 08:40:50,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:40:50,849 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1226019551, now seen corresponding path program 1 times [2020-12-22 08:40:50,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:50,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783902817] [2020-12-22 08:40:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:50,898 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 08:40:50,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783902817] [2020-12-22 08:40:50,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:50,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:40:50,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325412002] [2020-12-22 08:40:50,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:40:50,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:50,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:40:50,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:50,903 INFO L87 Difference]: Start difference. First operand 2300 states and 3291 transitions. Second operand 3 states. [2020-12-22 08:40:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:51,350 INFO L93 Difference]: Finished difference Result 4531 states and 6545 transitions. [2020-12-22 08:40:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:40:51,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 08:40:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:51,372 INFO L225 Difference]: With dead ends: 4531 [2020-12-22 08:40:51,372 INFO L226 Difference]: Without dead ends: 3256 [2020-12-22 08:40:51,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:40:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2020-12-22 08:40:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 3254. [2020-12-22 08:40:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3254 states. [2020-12-22 08:40:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 4629 transitions. [2020-12-22 08:40:51,824 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 4629 transitions. Word has length 54 [2020-12-22 08:40:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:51,824 INFO L481 AbstractCegarLoop]: Abstraction has 3254 states and 4629 transitions. [2020-12-22 08:40:51,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:40:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 4629 transitions. [2020-12-22 08:40:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:40:51,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:51,827 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] [2020-12-22 08:40:51,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:40:51,828 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash 595199301, now seen corresponding path program 1 times [2020-12-22 08:40:51,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:51,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866595872] [2020-12-22 08:40:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 08:40:51,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866595872] [2020-12-22 08:40:51,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:51,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:51,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787579014] [2020-12-22 08:40:51,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:51,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:51,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:51,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:51,939 INFO L87 Difference]: Start difference. First operand 3254 states and 4629 transitions. Second operand 6 states. [2020-12-22 08:40:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:53,499 INFO L93 Difference]: Finished difference Result 16780 states and 23886 transitions. [2020-12-22 08:40:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:53,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:40:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:53,568 INFO L225 Difference]: With dead ends: 16780 [2020-12-22 08:40:53,568 INFO L226 Difference]: Without dead ends: 13554 [2020-12-22 08:40:53,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:40:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13554 states. [2020-12-22 08:40:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13554 to 6478. [2020-12-22 08:40:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6478 states. [2020-12-22 08:40:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6478 states to 6478 states and 9181 transitions. [2020-12-22 08:40:54,732 INFO L78 Accepts]: Start accepts. Automaton has 6478 states and 9181 transitions. Word has length 77 [2020-12-22 08:40:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:54,733 INFO L481 AbstractCegarLoop]: Abstraction has 6478 states and 9181 transitions. [2020-12-22 08:40:54,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6478 states and 9181 transitions. [2020-12-22 08:40:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:40:54,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:54,739 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] [2020-12-22 08:40:54,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:40:54,740 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:54,740 INFO L82 PathProgramCache]: Analyzing trace with hash -558746805, now seen corresponding path program 1 times [2020-12-22 08:40:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:54,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946055559] [2020-12-22 08:40:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:54,912 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 08:40:54,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946055559] [2020-12-22 08:40:54,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:54,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:54,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618767154] [2020-12-22 08:40:54,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:54,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:54,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:54,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:54,916 INFO L87 Difference]: Start difference. First operand 6478 states and 9181 transitions. Second operand 6 states. [2020-12-22 08:40:56,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:40:56,617 INFO L93 Difference]: Finished difference Result 20004 states and 28438 transitions. [2020-12-22 08:40:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:40:56,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:40:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:40:56,665 INFO L225 Difference]: With dead ends: 20004 [2020-12-22 08:40:56,666 INFO L226 Difference]: Without dead ends: 16778 [2020-12-22 08:40:56,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16778 states. [2020-12-22 08:40:58,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16778 to 11322. [2020-12-22 08:40:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11322 states. [2020-12-22 08:40:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 15969 transitions. [2020-12-22 08:40:58,473 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 15969 transitions. Word has length 77 [2020-12-22 08:40:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:40:58,474 INFO L481 AbstractCegarLoop]: Abstraction has 11322 states and 15969 transitions. [2020-12-22 08:40:58,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:40:58,474 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 15969 transitions. [2020-12-22 08:40:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 08:40:58,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:40:58,477 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] [2020-12-22 08:40:58,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:40:58,477 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:40:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:40:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash -262701377, now seen corresponding path program 1 times [2020-12-22 08:40:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:40:58,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639517741] [2020-12-22 08:40:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:40:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:40:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 08:40:58,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639517741] [2020-12-22 08:40:58,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:40:58,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:40:58,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472460975] [2020-12-22 08:40:58,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:40:58,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:40:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:40:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:40:58,586 INFO L87 Difference]: Start difference. First operand 11322 states and 15969 transitions. Second operand 6 states. [2020-12-22 08:41:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:00,716 INFO L93 Difference]: Finished difference Result 23228 states and 32990 transitions. [2020-12-22 08:41:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:41:00,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-12-22 08:41:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:00,783 INFO L225 Difference]: With dead ends: 23228 [2020-12-22 08:41:00,783 INFO L226 Difference]: Without dead ends: 20002 [2020-12-22 08:41:00,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:41:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20002 states. [2020-12-22 08:41:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20002 to 14546. [2020-12-22 08:41:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14546 states. [2020-12-22 08:41:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14546 states to 14546 states and 20521 transitions. [2020-12-22 08:41:03,022 INFO L78 Accepts]: Start accepts. Automaton has 14546 states and 20521 transitions. Word has length 77 [2020-12-22 08:41:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:03,023 INFO L481 AbstractCegarLoop]: Abstraction has 14546 states and 20521 transitions. [2020-12-22 08:41:03,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:41:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14546 states and 20521 transitions. [2020-12-22 08:41:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 08:41:03,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:03,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:03,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:41:03,026 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:03,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2055185859, now seen corresponding path program 1 times [2020-12-22 08:41:03,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:03,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847262284] [2020-12-22 08:41:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:41:03,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847262284] [2020-12-22 08:41:03,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:03,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:41:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12502922] [2020-12-22 08:41:03,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:41:03,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:41:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:41:03,244 INFO L87 Difference]: Start difference. First operand 14546 states and 20521 transitions. Second operand 6 states. [2020-12-22 08:41:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:06,323 INFO L93 Difference]: Finished difference Result 24452 states and 34774 transitions. [2020-12-22 08:41:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:41:06,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 08:41:06,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:06,395 INFO L225 Difference]: With dead ends: 24452 [2020-12-22 08:41:06,396 INFO L226 Difference]: Without dead ends: 22226 [2020-12-22 08:41:06,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:41:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22226 states. [2020-12-22 08:41:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22226 to 16770. [2020-12-22 08:41:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16770 states. [2020-12-22 08:41:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16770 states to 16770 states and 23705 transitions. [2020-12-22 08:41:08,488 INFO L78 Accepts]: Start accepts. Automaton has 16770 states and 23705 transitions. Word has length 78 [2020-12-22 08:41:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:08,488 INFO L481 AbstractCegarLoop]: Abstraction has 16770 states and 23705 transitions. [2020-12-22 08:41:08,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:41:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 16770 states and 23705 transitions. [2020-12-22 08:41:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:41:08,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:08,499 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:08,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:41:08,499 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:08,500 INFO L82 PathProgramCache]: Analyzing trace with hash -144941472, now seen corresponding path program 1 times [2020-12-22 08:41:08,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:08,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936949862] [2020-12-22 08:41:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:08,577 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 08:41:08,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936949862] [2020-12-22 08:41:08,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:08,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:41:08,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213500943] [2020-12-22 08:41:08,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:41:08,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:08,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:41:08,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:41:08,580 INFO L87 Difference]: Start difference. First operand 16770 states and 23705 transitions. Second operand 3 states. [2020-12-22 08:41:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:09,969 INFO L93 Difference]: Finished difference Result 29038 states and 41257 transitions. [2020-12-22 08:41:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:41:09,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 08:41:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:10,008 INFO L225 Difference]: With dead ends: 29038 [2020-12-22 08:41:10,008 INFO L226 Difference]: Without dead ends: 12296 [2020-12-22 08:41:10,042 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 08:41:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12296 states. [2020-12-22 08:41:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12296 to 12294. [2020-12-22 08:41:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12294 states. [2020-12-22 08:41:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12294 states to 12294 states and 17402 transitions. [2020-12-22 08:41:11,958 INFO L78 Accepts]: Start accepts. Automaton has 12294 states and 17402 transitions. Word has length 79 [2020-12-22 08:41:11,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:11,958 INFO L481 AbstractCegarLoop]: Abstraction has 12294 states and 17402 transitions. [2020-12-22 08:41:11,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:41:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 12294 states and 17402 transitions. [2020-12-22 08:41:11,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 08:41:11,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:11,962 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 08:41:11,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:41:11,962 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1559581035, now seen corresponding path program 1 times [2020-12-22 08:41:11,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:11,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39089383] [2020-12-22 08:41:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:12,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39089383] [2020-12-22 08:41:12,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088148664] [2020-12-22 08:41:12,267 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 08:41:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:12,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 08:41:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:41:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 08:41:12,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:41:12,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 08:41:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801311199] [2020-12-22 08:41:12,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:41:12,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:41:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:41:12,912 INFO L87 Difference]: Start difference. First operand 12294 states and 17402 transitions. Second operand 12 states. [2020-12-22 08:41:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:29,127 INFO L93 Difference]: Finished difference Result 105977 states and 147216 transitions. [2020-12-22 08:41:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 08:41:29,128 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-12-22 08:41:29,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:29,437 INFO L225 Difference]: With dead ends: 105977 [2020-12-22 08:41:29,437 INFO L226 Difference]: Without dead ends: 93713 [2020-12-22 08:41:29,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=685, Invalid=2975, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 08:41:29,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93713 states. [2020-12-22 08:41:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93713 to 37943. [2020-12-22 08:41:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37943 states. [2020-12-22 08:41:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37943 states to 37943 states and 51661 transitions. [2020-12-22 08:41:36,331 INFO L78 Accepts]: Start accepts. Automaton has 37943 states and 51661 transitions. Word has length 79 [2020-12-22 08:41:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:36,333 INFO L481 AbstractCegarLoop]: Abstraction has 37943 states and 51661 transitions. [2020-12-22 08:41:36,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:41:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 37943 states and 51661 transitions. [2020-12-22 08:41:36,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 08:41:36,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:36,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:36,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 08:41:36,550 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2040940735, now seen corresponding path program 1 times [2020-12-22 08:41:36,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:36,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219814112] [2020-12-22 08:41:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:37,019 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-12-22 08:41:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219814112] [2020-12-22 08:41:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165238311] [2020-12-22 08:41:37,085 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 08:41:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 08:41:37,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:41:37,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 08:41:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:37,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:41:37,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 08:41:37,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448623629] [2020-12-22 08:41:37,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:41:37,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:41:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:41:37,900 INFO L87 Difference]: Start difference. First operand 37943 states and 51661 transitions. Second operand 17 states. [2020-12-22 08:41:38,856 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 08:41:39,930 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 08:41:40,597 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 08:41:40,982 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 08:41:41,138 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 08:41:41,540 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 08:41:42,811 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-22 08:41:43,006 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 08:41:43,685 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 08:41:44,282 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 08:41:44,625 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 08:41:44,845 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 08:41:45,092 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-22 08:41:45,398 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 08:41:45,830 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 08:41:45,962 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-22 08:41:46,150 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 08:41:46,901 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 08:41:47,403 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 08:41:49,267 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-22 08:41:49,579 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 08:41:50,222 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 08:41:50,491 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 08:41:51,275 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 08:41:58,542 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 08:41:59,214 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-22 08:42:00,055 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 08:42:00,550 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 08:42:02,382 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 08:42:02,979 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-22 08:42:03,454 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 08:42:04,634 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 08:42:04,829 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 08:42:05,570 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 08:42:07,077 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-22 08:42:07,232 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-22 08:42:07,409 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 08:42:07,638 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 08:42:07,819 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 08:42:09,289 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-12-22 08:42:09,499 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-22 08:42:09,973 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-22 08:42:10,442 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-22 08:42:11,290 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 08:42:12,094 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 08:42:13,143 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-12-22 08:42:13,416 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-22 08:43:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:43:53,447 INFO L93 Difference]: Finished difference Result 712617 states and 957602 transitions. [2020-12-22 08:43:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2020-12-22 08:43:53,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 08:43:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:43:55,656 INFO L225 Difference]: With dead ends: 712617 [2020-12-22 08:43:55,656 INFO L226 Difference]: Without dead ends: 678032 [2020-12-22 08:43:56,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31810 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=7993, Invalid=62497, Unknown=0, NotChecked=0, Total=70490 [2020-12-22 08:43:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678032 states.