/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-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:17:41,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:17:41,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:17:41,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:17:41,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:17:41,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:17:41,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:17:41,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:17:41,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:17:41,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:17:41,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:17:41,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:17:41,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:17:41,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:17:41,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:17:41,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:17:41,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:17:41,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:17:41,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:17:41,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:17:41,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:17:41,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:17:41,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:17:41,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:17:41,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:17:41,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:17:41,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:17:41,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:17:41,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:17:41,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:17:41,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:17:41,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:17:41,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:17:41,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:17:41,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:17:41,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:17:41,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:17:41,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:17:41,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:17:41,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:17:41,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:17:41,367 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:17:41,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:17:41,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:17:41,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:17:41,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:17:41,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:17:41,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:17:41,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:17:41,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:17:41,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:17:41,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:17:41,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:17:41,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:17:41,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:17:41,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:17:41,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:17:41,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:17:41,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:17:41,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:17:41,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:17:41,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:17:41,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:17:41,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:17:41,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:17:41,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:17:41,792 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:17:41,793 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:17:41,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:17:41,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca97bf0c/76bc40243c894522b5cfae7d40da4f32/FLAGab4d2354d [2020-12-22 08:17:42,629 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:17:42,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:17:42,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca97bf0c/76bc40243c894522b5cfae7d40da4f32/FLAGab4d2354d [2020-12-22 08:17:42,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ca97bf0c/76bc40243c894522b5cfae7d40da4f32 [2020-12-22 08:17:42,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:17:42,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:17:42,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:17:42,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:17:42,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:17:42,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:17:42" (1/1) ... [2020-12-22 08:17:42,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cbdda8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:42, skipping insertion in model container [2020-12-22 08:17:42,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:17:42" (1/1) ... [2020-12-22 08:17:42,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:17:42,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:17:43,331 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-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6761,6774] [2020-12-22 08:17:43,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:17:43,411 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:17:43,462 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-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6761,6774] [2020-12-22 08:17:43,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:17:43,514 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:17:43,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43 WrapperNode [2020-12-22 08:17:43,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:17:43,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:17:43,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:17:43,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:17:43,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:17:43,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:17:43,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:17:43,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:17:43,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (1/1) ... [2020-12-22 08:17:43,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:17:43,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:17:43,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:17:43,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:17:43,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (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 08:17:43,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:17:43,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:17:43,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:17:43,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:17:44,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:17:44,597 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:17:44,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:17:44 BoogieIcfgContainer [2020-12-22 08:17:44,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:17:44,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:17:44,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:17:44,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:17:44,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:17:42" (1/3) ... [2020-12-22 08:17:44,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654ba6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:17:44, skipping insertion in model container [2020-12-22 08:17:44,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:17:43" (2/3) ... [2020-12-22 08:17:44,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654ba6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:17:44, skipping insertion in model container [2020-12-22 08:17:44,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:17:44" (3/3) ... [2020-12-22 08:17:44,612 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:17:44,617 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:17:44,623 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:17:44,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:17:44,682 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:17:44,683 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:17:44,683 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:17:44,683 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:17:44,683 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:17:44,684 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:17:44,684 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:17:44,684 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:17:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2020-12-22 08:17:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 08:17:44,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:44,713 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 08:17:44,713 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:44,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:44,720 INFO L82 PathProgramCache]: Analyzing trace with hash -235222256, now seen corresponding path program 1 times [2020-12-22 08:17:44,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:44,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054978974] [2020-12-22 08:17:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:45,165 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 08:17:45,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054978974] [2020-12-22 08:17:45,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:45,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:45,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145604217] [2020-12-22 08:17:45,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:45,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:45,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:45,191 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 3 states. [2020-12-22 08:17:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:45,310 INFO L93 Difference]: Finished difference Result 284 states and 462 transitions. [2020-12-22 08:17:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:45,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 08:17:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:45,327 INFO L225 Difference]: With dead ends: 284 [2020-12-22 08:17:45,327 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 08:17:45,331 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 08:17:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 08:17:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-12-22 08:17:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-22 08:17:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 320 transitions. [2020-12-22 08:17:45,406 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 320 transitions. Word has length 48 [2020-12-22 08:17:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:45,407 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 320 transitions. [2020-12-22 08:17:45,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:45,407 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 320 transitions. [2020-12-22 08:17:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:17:45,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:45,410 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 08:17:45,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:17:45,411 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash 407331856, now seen corresponding path program 1 times [2020-12-22 08:17:45,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:45,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475412009] [2020-12-22 08:17:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:45,526 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 08:17:45,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475412009] [2020-12-22 08:17:45,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:45,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:45,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668026712] [2020-12-22 08:17:45,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:45,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:45,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:45,531 INFO L87 Difference]: Start difference. First operand 214 states and 320 transitions. Second operand 3 states. [2020-12-22 08:17:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:45,618 INFO L93 Difference]: Finished difference Result 518 states and 794 transitions. [2020-12-22 08:17:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:45,621 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:17:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:45,626 INFO L225 Difference]: With dead ends: 518 [2020-12-22 08:17:45,626 INFO L226 Difference]: Without dead ends: 367 [2020-12-22 08:17:45,633 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 08:17:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-22 08:17:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2020-12-22 08:17:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-12-22 08:17:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 548 transitions. [2020-12-22 08:17:45,705 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 548 transitions. Word has length 51 [2020-12-22 08:17:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:45,706 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 548 transitions. [2020-12-22 08:17:45,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 548 transitions. [2020-12-22 08:17:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:17:45,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:45,712 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 08:17:45,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:17:45,713 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:45,714 INFO L82 PathProgramCache]: Analyzing trace with hash 738781713, now seen corresponding path program 1 times [2020-12-22 08:17:45,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:45,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488580958] [2020-12-22 08:17:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:45,839 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 08:17:45,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488580958] [2020-12-22 08:17:45,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:45,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:45,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933216422] [2020-12-22 08:17:45,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:45,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:45,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:45,842 INFO L87 Difference]: Start difference. First operand 365 states and 548 transitions. Second operand 3 states. [2020-12-22 08:17:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:45,926 INFO L93 Difference]: Finished difference Result 877 states and 1336 transitions. [2020-12-22 08:17:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:45,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:17:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:45,932 INFO L225 Difference]: With dead ends: 877 [2020-12-22 08:17:45,932 INFO L226 Difference]: Without dead ends: 623 [2020-12-22 08:17:45,934 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 08:17:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-12-22 08:17:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 621. [2020-12-22 08:17:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-12-22 08:17:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 926 transitions. [2020-12-22 08:17:45,975 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 926 transitions. Word has length 51 [2020-12-22 08:17:45,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:45,975 INFO L481 AbstractCegarLoop]: Abstraction has 621 states and 926 transitions. [2020-12-22 08:17:45,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 926 transitions. [2020-12-22 08:17:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:17:45,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:45,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:45,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:17:45,980 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:45,981 INFO L82 PathProgramCache]: Analyzing trace with hash -865520847, now seen corresponding path program 1 times [2020-12-22 08:17:45,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:45,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476143274] [2020-12-22 08:17:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:46,117 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 08:17:46,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476143274] [2020-12-22 08:17:46,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:46,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:46,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981210912] [2020-12-22 08:17:46,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:46,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:46,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:46,121 INFO L87 Difference]: Start difference. First operand 621 states and 926 transitions. Second operand 3 states. [2020-12-22 08:17:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:46,234 INFO L93 Difference]: Finished difference Result 1635 states and 2454 transitions. [2020-12-22 08:17:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:46,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 08:17:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:46,241 INFO L225 Difference]: With dead ends: 1635 [2020-12-22 08:17:46,241 INFO L226 Difference]: Without dead ends: 1101 [2020-12-22 08:17:46,243 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 08:17:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-12-22 08:17:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2020-12-22 08:17:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1099 states. [2020-12-22 08:17:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1608 transitions. [2020-12-22 08:17:46,309 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1608 transitions. Word has length 51 [2020-12-22 08:17:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:46,310 INFO L481 AbstractCegarLoop]: Abstraction has 1099 states and 1608 transitions. [2020-12-22 08:17:46,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1608 transitions. [2020-12-22 08:17:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:17:46,314 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:46,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:46,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:17:46,314 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1376619607, now seen corresponding path program 1 times [2020-12-22 08:17:46,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:46,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337986891] [2020-12-22 08:17:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:46,423 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 08:17:46,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337986891] [2020-12-22 08:17:46,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:46,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623843417] [2020-12-22 08:17:46,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:46,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:46,427 INFO L87 Difference]: Start difference. First operand 1099 states and 1608 transitions. Second operand 5 states. [2020-12-22 08:17:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:46,644 INFO L93 Difference]: Finished difference Result 3397 states and 5066 transitions. [2020-12-22 08:17:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:46,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 08:17:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:46,660 INFO L225 Difference]: With dead ends: 3397 [2020-12-22 08:17:46,660 INFO L226 Difference]: Without dead ends: 2723 [2020-12-22 08:17:46,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2020-12-22 08:17:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 1305. [2020-12-22 08:17:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2020-12-22 08:17:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1923 transitions. [2020-12-22 08:17:46,780 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1923 transitions. Word has length 52 [2020-12-22 08:17:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:46,781 INFO L481 AbstractCegarLoop]: Abstraction has 1305 states and 1923 transitions. [2020-12-22 08:17:46,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1923 transitions. [2020-12-22 08:17:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:17:46,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:46,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:46,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:17:46,784 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1542318405, now seen corresponding path program 1 times [2020-12-22 08:17:46,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:46,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348228897] [2020-12-22 08:17:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:46,872 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 08:17:46,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348228897] [2020-12-22 08:17:46,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:46,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:17:46,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9143020] [2020-12-22 08:17:46,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:46,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:46,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:46,877 INFO L87 Difference]: Start difference. First operand 1305 states and 1923 transitions. Second operand 5 states. [2020-12-22 08:17:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:47,275 INFO L93 Difference]: Finished difference Result 3037 states and 4485 transitions. [2020-12-22 08:17:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:47,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-12-22 08:17:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:47,286 INFO L225 Difference]: With dead ends: 3037 [2020-12-22 08:17:47,286 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 08:17:47,289 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 08:17:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 08:17:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1797. [2020-12-22 08:17:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1797 states. [2020-12-22 08:17:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2626 transitions. [2020-12-22 08:17:47,460 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2626 transitions. Word has length 52 [2020-12-22 08:17:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:47,461 INFO L481 AbstractCegarLoop]: Abstraction has 1797 states and 2626 transitions. [2020-12-22 08:17:47,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2626 transitions. [2020-12-22 08:17:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:17:47,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:47,463 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 08:17:47,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:17:47,463 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:47,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1268142435, now seen corresponding path program 1 times [2020-12-22 08:17:47,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:47,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733502457] [2020-12-22 08:17:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:47,536 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 08:17:47,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733502457] [2020-12-22 08:17:47,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:47,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:17:47,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921307565] [2020-12-22 08:17:47,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:47,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:47,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:47,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:47,539 INFO L87 Difference]: Start difference. First operand 1797 states and 2626 transitions. Second operand 5 states. [2020-12-22 08:17:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:47,985 INFO L93 Difference]: Finished difference Result 4218 states and 6170 transitions. [2020-12-22 08:17:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:47,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:17:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:47,998 INFO L225 Difference]: With dead ends: 4218 [2020-12-22 08:17:47,999 INFO L226 Difference]: Without dead ends: 2507 [2020-12-22 08:17:48,005 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 08:17:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2020-12-22 08:17:48,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1797. [2020-12-22 08:17:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1797 states. [2020-12-22 08:17:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2601 transitions. [2020-12-22 08:17:48,161 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2601 transitions. Word has length 53 [2020-12-22 08:17:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:48,162 INFO L481 AbstractCegarLoop]: Abstraction has 1797 states and 2601 transitions. [2020-12-22 08:17:48,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2601 transitions. [2020-12-22 08:17:48,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:17:48,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:48,165 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 08:17:48,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:17:48,166 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:48,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:48,167 INFO L82 PathProgramCache]: Analyzing trace with hash 109147901, now seen corresponding path program 1 times [2020-12-22 08:17:48,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:48,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588378053] [2020-12-22 08:17:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:48,357 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 08:17:48,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588378053] [2020-12-22 08:17:48,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:48,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927012631] [2020-12-22 08:17:48,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:48,367 INFO L87 Difference]: Start difference. First operand 1797 states and 2601 transitions. Second operand 5 states. [2020-12-22 08:17:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:48,904 INFO L93 Difference]: Finished difference Result 5121 states and 7489 transitions. [2020-12-22 08:17:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:48,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-12-22 08:17:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:48,925 INFO L225 Difference]: With dead ends: 5121 [2020-12-22 08:17:48,925 INFO L226 Difference]: Without dead ends: 4123 [2020-12-22 08:17:48,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2020-12-22 08:17:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 2147. [2020-12-22 08:17:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2020-12-22 08:17:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 3123 transitions. [2020-12-22 08:17:49,160 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 3123 transitions. Word has length 53 [2020-12-22 08:17:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:49,161 INFO L481 AbstractCegarLoop]: Abstraction has 2147 states and 3123 transitions. [2020-12-22 08:17:49,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 3123 transitions. [2020-12-22 08:17:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:17:49,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:49,163 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 08:17:49,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:17:49,163 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash -442062535, now seen corresponding path program 1 times [2020-12-22 08:17:49,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:49,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033395299] [2020-12-22 08:17:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:49,245 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 08:17:49,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033395299] [2020-12-22 08:17:49,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:49,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:49,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868361776] [2020-12-22 08:17:49,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:49,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:49,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:49,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:49,253 INFO L87 Difference]: Start difference. First operand 2147 states and 3123 transitions. Second operand 5 states. [2020-12-22 08:17:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:49,709 INFO L93 Difference]: Finished difference Result 5493 states and 8036 transitions. [2020-12-22 08:17:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:49,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-12-22 08:17:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:49,731 INFO L225 Difference]: With dead ends: 5493 [2020-12-22 08:17:49,732 INFO L226 Difference]: Without dead ends: 4495 [2020-12-22 08:17:49,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2020-12-22 08:17:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 2683. [2020-12-22 08:17:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2683 states. [2020-12-22 08:17:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2683 states to 2683 states and 3924 transitions. [2020-12-22 08:17:50,046 INFO L78 Accepts]: Start accepts. Automaton has 2683 states and 3924 transitions. Word has length 54 [2020-12-22 08:17:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:50,046 INFO L481 AbstractCegarLoop]: Abstraction has 2683 states and 3924 transitions. [2020-12-22 08:17:50,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2683 states and 3924 transitions. [2020-12-22 08:17:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:17:50,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:50,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:50,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:17:50,050 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:50,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:50,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1520651092, now seen corresponding path program 1 times [2020-12-22 08:17:50,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:50,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985500832] [2020-12-22 08:17:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:50,155 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 08:17:50,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985500832] [2020-12-22 08:17:50,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:50,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:50,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140825990] [2020-12-22 08:17:50,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:17:50,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:50,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:17:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:17:50,158 INFO L87 Difference]: Start difference. First operand 2683 states and 3924 transitions. Second operand 6 states. [2020-12-22 08:17:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:50,935 INFO L93 Difference]: Finished difference Result 8299 states and 12150 transitions. [2020-12-22 08:17:50,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:50,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-12-22 08:17:50,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:50,968 INFO L225 Difference]: With dead ends: 8299 [2020-12-22 08:17:50,968 INFO L226 Difference]: Without dead ends: 5657 [2020-12-22 08:17:50,975 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 08:17:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5657 states. [2020-12-22 08:17:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5657 to 5617. [2020-12-22 08:17:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5617 states. [2020-12-22 08:17:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 8189 transitions. [2020-12-22 08:17:51,516 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 8189 transitions. Word has length 57 [2020-12-22 08:17:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:51,517 INFO L481 AbstractCegarLoop]: Abstraction has 5617 states and 8189 transitions. [2020-12-22 08:17:51,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:17:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 8189 transitions. [2020-12-22 08:17:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:17:51,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:51,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:51,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:17:51,521 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:51,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1438328999, now seen corresponding path program 1 times [2020-12-22 08:17:51,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:51,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142884433] [2020-12-22 08:17:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:51,616 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 08:17:51,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142884433] [2020-12-22 08:17:51,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:51,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:17:51,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397216058] [2020-12-22 08:17:51,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:17:51,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:51,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:17:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:51,619 INFO L87 Difference]: Start difference. First operand 5617 states and 8189 transitions. Second operand 7 states. [2020-12-22 08:17:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:54,219 INFO L93 Difference]: Finished difference Result 25076 states and 36342 transitions. [2020-12-22 08:17:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:17:54,219 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-12-22 08:17:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:54,297 INFO L225 Difference]: With dead ends: 25076 [2020-12-22 08:17:54,297 INFO L226 Difference]: Without dead ends: 23342 [2020-12-22 08:17:54,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:17:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23342 states. [2020-12-22 08:17:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23342 to 5629. [2020-12-22 08:17:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5629 states. [2020-12-22 08:17:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5629 states to 5629 states and 8205 transitions. [2020-12-22 08:17:55,178 INFO L78 Accepts]: Start accepts. Automaton has 5629 states and 8205 transitions. Word has length 58 [2020-12-22 08:17:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:55,178 INFO L481 AbstractCegarLoop]: Abstraction has 5629 states and 8205 transitions. [2020-12-22 08:17:55,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:17:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5629 states and 8205 transitions. [2020-12-22 08:17:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:17:55,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:55,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:55,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:17:55,188 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash -497478917, now seen corresponding path program 1 times [2020-12-22 08:17:55,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:55,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572183735] [2020-12-22 08:17:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:55,282 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 08:17:55,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572183735] [2020-12-22 08:17:55,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:55,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:17:55,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656986956] [2020-12-22 08:17:55,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:17:55,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:55,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:17:55,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:55,285 INFO L87 Difference]: Start difference. First operand 5629 states and 8205 transitions. Second operand 7 states. [2020-12-22 08:17:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:57,573 INFO L93 Difference]: Finished difference Result 22234 states and 32130 transitions. [2020-12-22 08:17:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:17:57,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:17:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:57,620 INFO L225 Difference]: With dead ends: 22234 [2020-12-22 08:17:57,620 INFO L226 Difference]: Without dead ends: 19349 [2020-12-22 08:17:57,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:17:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19349 states. [2020-12-22 08:17:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19349 to 5649. [2020-12-22 08:17:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5649 states. [2020-12-22 08:17:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5649 states to 5649 states and 8229 transitions. [2020-12-22 08:17:58,507 INFO L78 Accepts]: Start accepts. Automaton has 5649 states and 8229 transitions. Word has length 59 [2020-12-22 08:17:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:58,507 INFO L481 AbstractCegarLoop]: Abstraction has 5649 states and 8229 transitions. [2020-12-22 08:17:58,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:17:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5649 states and 8229 transitions. [2020-12-22 08:17:58,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:17:58,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:58,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:17:58,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:17:58,511 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2094347044, now seen corresponding path program 1 times [2020-12-22 08:17:58,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:58,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530746621] [2020-12-22 08:17:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:58,587 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 08:17:58,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530746621] [2020-12-22 08:17:58,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:58,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:17:58,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505401273] [2020-12-22 08:17:58,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:17:58,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:58,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:17:58,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:17:58,589 INFO L87 Difference]: Start difference. First operand 5649 states and 8229 transitions. Second operand 7 states. [2020-12-22 08:18:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:01,647 INFO L93 Difference]: Finished difference Result 24365 states and 35190 transitions. [2020-12-22 08:18:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:18:01,647 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-12-22 08:18:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:01,688 INFO L225 Difference]: With dead ends: 24365 [2020-12-22 08:18:01,689 INFO L226 Difference]: Without dead ends: 22038 [2020-12-22 08:18:01,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:18:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22038 states. [2020-12-22 08:18:02,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22038 to 5727. [2020-12-22 08:18:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5727 states. [2020-12-22 08:18:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5727 states to 5727 states and 8329 transitions. [2020-12-22 08:18:02,529 INFO L78 Accepts]: Start accepts. Automaton has 5727 states and 8329 transitions. Word has length 59 [2020-12-22 08:18:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:02,529 INFO L481 AbstractCegarLoop]: Abstraction has 5727 states and 8329 transitions. [2020-12-22 08:18:02,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:18:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5727 states and 8329 transitions. [2020-12-22 08:18:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:18:02,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:02,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:02,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:18:02,534 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash 740296785, now seen corresponding path program 1 times [2020-12-22 08:18:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:02,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098938630] [2020-12-22 08:18:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:02,737 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 08:18:02,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098938630] [2020-12-22 08:18:02,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:02,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:18:02,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400996120] [2020-12-22 08:18:02,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:18:02,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:18:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:18:02,739 INFO L87 Difference]: Start difference. First operand 5727 states and 8329 transitions. Second operand 10 states. [2020-12-22 08:18:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:05,896 INFO L93 Difference]: Finished difference Result 20151 states and 29183 transitions. [2020-12-22 08:18:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 08:18:05,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:18:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:05,925 INFO L225 Difference]: With dead ends: 20151 [2020-12-22 08:18:05,926 INFO L226 Difference]: Without dead ends: 15216 [2020-12-22 08:18:05,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:18:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15216 states. [2020-12-22 08:18:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15216 to 5727. [2020-12-22 08:18:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5727 states. [2020-12-22 08:18:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5727 states to 5727 states and 8323 transitions. [2020-12-22 08:18:07,005 INFO L78 Accepts]: Start accepts. Automaton has 5727 states and 8323 transitions. Word has length 61 [2020-12-22 08:18:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:07,005 INFO L481 AbstractCegarLoop]: Abstraction has 5727 states and 8323 transitions. [2020-12-22 08:18:07,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:18:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5727 states and 8323 transitions. [2020-12-22 08:18:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:18:07,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:07,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:07,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:18:07,010 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:07,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1120228239, now seen corresponding path program 1 times [2020-12-22 08:18:07,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:07,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018071622] [2020-12-22 08:18:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:07,247 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 08:18:07,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018071622] [2020-12-22 08:18:07,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:07,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:18:07,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452355976] [2020-12-22 08:18:07,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:18:07,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:07,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:18:07,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:18:07,250 INFO L87 Difference]: Start difference. First operand 5727 states and 8323 transitions. Second operand 10 states. [2020-12-22 08:18:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:10,912 INFO L93 Difference]: Finished difference Result 18637 states and 27039 transitions. [2020-12-22 08:18:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:18:10,912 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:18:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:10,927 INFO L225 Difference]: With dead ends: 18637 [2020-12-22 08:18:10,927 INFO L226 Difference]: Without dead ends: 13811 [2020-12-22 08:18:10,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-12-22 08:18:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13811 states. [2020-12-22 08:18:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13811 to 5605. [2020-12-22 08:18:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2020-12-22 08:18:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 8129 transitions. [2020-12-22 08:18:11,928 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 8129 transitions. Word has length 61 [2020-12-22 08:18:11,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:11,928 INFO L481 AbstractCegarLoop]: Abstraction has 5605 states and 8129 transitions. [2020-12-22 08:18:11,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:18:11,928 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 8129 transitions. [2020-12-22 08:18:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:18:11,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:11,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:11,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:18:11,932 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1451678096, now seen corresponding path program 1 times [2020-12-22 08:18:11,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:11,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945236801] [2020-12-22 08:18:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:12,106 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 08:18:12,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945236801] [2020-12-22 08:18:12,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:12,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:18:12,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249317960] [2020-12-22 08:18:12,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:18:12,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:12,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:18:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:18:12,109 INFO L87 Difference]: Start difference. First operand 5605 states and 8129 transitions. Second operand 10 states. [2020-12-22 08:18:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:15,536 INFO L93 Difference]: Finished difference Result 19502 states and 28281 transitions. [2020-12-22 08:18:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 08:18:15,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-12-22 08:18:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:15,551 INFO L225 Difference]: With dead ends: 19502 [2020-12-22 08:18:15,551 INFO L226 Difference]: Without dead ends: 14672 [2020-12-22 08:18:15,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:18:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14672 states. [2020-12-22 08:18:16,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14672 to 5475. [2020-12-22 08:18:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5475 states. [2020-12-22 08:18:16,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 7926 transitions. [2020-12-22 08:18:16,419 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 7926 transitions. Word has length 61 [2020-12-22 08:18:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:16,420 INFO L481 AbstractCegarLoop]: Abstraction has 5475 states and 7926 transitions. [2020-12-22 08:18:16,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:18:16,420 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 7926 transitions. [2020-12-22 08:18:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:18:16,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:16,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:16,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:18:16,423 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:16,423 INFO L82 PathProgramCache]: Analyzing trace with hash 218587336, now seen corresponding path program 1 times [2020-12-22 08:18:16,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:16,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744314748] [2020-12-22 08:18:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:16,473 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 08:18:16,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744314748] [2020-12-22 08:18:16,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:16,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:16,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168801245] [2020-12-22 08:18:16,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:16,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:16,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:16,476 INFO L87 Difference]: Start difference. First operand 5475 states and 7926 transitions. Second operand 3 states. [2020-12-22 08:18:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:17,460 INFO L93 Difference]: Finished difference Result 7758 states and 11235 transitions. [2020-12-22 08:18:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:17,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:18:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:17,465 INFO L225 Difference]: With dead ends: 7758 [2020-12-22 08:18:17,465 INFO L226 Difference]: Without dead ends: 5462 [2020-12-22 08:18:17,469 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 08:18:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2020-12-22 08:18:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 5460. [2020-12-22 08:18:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5460 states. [2020-12-22 08:18:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 7795 transitions. [2020-12-22 08:18:18,211 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 7795 transitions. Word has length 62 [2020-12-22 08:18:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:18,211 INFO L481 AbstractCegarLoop]: Abstraction has 5460 states and 7795 transitions. [2020-12-22 08:18:18,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 7795 transitions. [2020-12-22 08:18:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:18:18,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:18,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:18,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:18:18,215 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:18,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1004137309, now seen corresponding path program 1 times [2020-12-22 08:18:18,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:18,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024613679] [2020-12-22 08:18:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:18,267 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 08:18:18,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024613679] [2020-12-22 08:18:18,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:18,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:18,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855970047] [2020-12-22 08:18:18,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:18,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:18,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:18,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:18,269 INFO L87 Difference]: Start difference. First operand 5460 states and 7795 transitions. Second operand 3 states. [2020-12-22 08:18:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:19,031 INFO L93 Difference]: Finished difference Result 7465 states and 10655 transitions. [2020-12-22 08:18:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:19,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:18:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:19,036 INFO L225 Difference]: With dead ends: 7465 [2020-12-22 08:18:19,036 INFO L226 Difference]: Without dead ends: 4763 [2020-12-22 08:18:19,040 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 08:18:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2020-12-22 08:18:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 4761. [2020-12-22 08:18:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4761 states. [2020-12-22 08:18:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 6684 transitions. [2020-12-22 08:18:19,746 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 6684 transitions. Word has length 62 [2020-12-22 08:18:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:19,746 INFO L481 AbstractCegarLoop]: Abstraction has 4761 states and 6684 transitions. [2020-12-22 08:18:19,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 6684 transitions. [2020-12-22 08:18:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:18:19,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:19,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:19,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:18:19,750 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:19,751 INFO L82 PathProgramCache]: Analyzing trace with hash -17959571, now seen corresponding path program 1 times [2020-12-22 08:18:19,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:19,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692473881] [2020-12-22 08:18:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:19,792 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 08:18:19,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692473881] [2020-12-22 08:18:19,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:19,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:19,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238238196] [2020-12-22 08:18:19,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:19,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:19,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:19,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:19,794 INFO L87 Difference]: Start difference. First operand 4761 states and 6684 transitions. Second operand 3 states. [2020-12-22 08:18:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:20,883 INFO L93 Difference]: Finished difference Result 5753 states and 8048 transitions. [2020-12-22 08:18:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:20,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:18:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:20,890 INFO L225 Difference]: With dead ends: 5753 [2020-12-22 08:18:20,890 INFO L226 Difference]: Without dead ends: 4134 [2020-12-22 08:18:20,893 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 08:18:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2020-12-22 08:18:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 4132. [2020-12-22 08:18:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4132 states. [2020-12-22 08:18:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 5671 transitions. [2020-12-22 08:18:21,552 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 5671 transitions. Word has length 62 [2020-12-22 08:18:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:21,552 INFO L481 AbstractCegarLoop]: Abstraction has 4132 states and 5671 transitions. [2020-12-22 08:18:21,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 5671 transitions. [2020-12-22 08:18:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:18:21,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:21,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:21,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:18:21,555 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash -467159905, now seen corresponding path program 1 times [2020-12-22 08:18:21,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:21,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054218821] [2020-12-22 08:18:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:22,459 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 08:18:22,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054218821] [2020-12-22 08:18:22,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:22,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:18:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677041340] [2020-12-22 08:18:22,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:18:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:18:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:18:22,461 INFO L87 Difference]: Start difference. First operand 4132 states and 5671 transitions. Second operand 23 states. [2020-12-22 08:18:22,725 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2020-12-22 08:18:23,462 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 08:18:23,778 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-12-22 08:18:24,063 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-12-22 08:18:24,564 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2020-12-22 08:18:24,911 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 08:18:25,087 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 08:18:25,336 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 08:18:25,635 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:18:25,922 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-12-22 08:18:26,185 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-22 08:18:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:31,793 INFO L93 Difference]: Finished difference Result 10444 states and 14472 transitions. [2020-12-22 08:18:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 08:18:31,794 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:18:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:31,805 INFO L225 Difference]: With dead ends: 10444 [2020-12-22 08:18:31,805 INFO L226 Difference]: Without dead ends: 10241 [2020-12-22 08:18:31,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 08:18:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2020-12-22 08:18:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 4114. [2020-12-22 08:18:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4114 states. [2020-12-22 08:18:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 5645 transitions. [2020-12-22 08:18:32,558 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 5645 transitions. Word has length 63 [2020-12-22 08:18:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:32,559 INFO L481 AbstractCegarLoop]: Abstraction has 4114 states and 5645 transitions. [2020-12-22 08:18:32,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:18:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 5645 transitions. [2020-12-22 08:18:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:18:32,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:32,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:32,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:18:32,562 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:32,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1917860387, now seen corresponding path program 1 times [2020-12-22 08:18:32,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:32,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362500641] [2020-12-22 08:18:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:33,496 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 08:18:33,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362500641] [2020-12-22 08:18:33,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:33,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-12-22 08:18:33,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339628559] [2020-12-22 08:18:33,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 08:18:33,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:33,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 08:18:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-12-22 08:18:33,499 INFO L87 Difference]: Start difference. First operand 4114 states and 5645 transitions. Second operand 23 states. [2020-12-22 08:18:33,871 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-12-22 08:18:34,795 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 08:18:35,187 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 08:18:35,531 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-12-22 08:18:36,154 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2020-12-22 08:18:36,599 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2020-12-22 08:18:36,806 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 08:18:37,084 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 08:18:37,409 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 08:18:37,707 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-12-22 08:18:38,004 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 08:18:38,414 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-12-22 08:18:38,628 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-22 08:18:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:45,224 INFO L93 Difference]: Finished difference Result 13111 states and 18197 transitions. [2020-12-22 08:18:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 08:18:45,225 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-12-22 08:18:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:45,237 INFO L225 Difference]: With dead ends: 13111 [2020-12-22 08:18:45,238 INFO L226 Difference]: Without dead ends: 12908 [2020-12-22 08:18:45,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=475, Invalid=1975, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 08:18:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12908 states. [2020-12-22 08:18:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12908 to 4114. [2020-12-22 08:18:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4114 states. [2020-12-22 08:18:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 5644 transitions. [2020-12-22 08:18:45,981 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 5644 transitions. Word has length 63 [2020-12-22 08:18:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:45,982 INFO L481 AbstractCegarLoop]: Abstraction has 4114 states and 5644 transitions. [2020-12-22 08:18:45,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 08:18:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 5644 transitions. [2020-12-22 08:18:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:18:45,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:45,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:45,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:18:45,984 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:45,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1791049563, now seen corresponding path program 1 times [2020-12-22 08:18:45,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:45,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201571370] [2020-12-22 08:18:45,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:46,764 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 08:18:46,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201571370] [2020-12-22 08:18:46,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:46,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-12-22 08:18:46,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766060639] [2020-12-22 08:18:46,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 08:18:46,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:46,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 08:18:46,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:18:46,766 INFO L87 Difference]: Start difference. First operand 4114 states and 5644 transitions. Second operand 22 states. [2020-12-22 08:18:48,574 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 08:18:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:55,300 INFO L93 Difference]: Finished difference Result 10084 states and 13960 transitions. [2020-12-22 08:18:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:18:55,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-12-22 08:18:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:55,311 INFO L225 Difference]: With dead ends: 10084 [2020-12-22 08:18:55,312 INFO L226 Difference]: Without dead ends: 9770 [2020-12-22 08:18:55,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:18:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9770 states. [2020-12-22 08:18:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9770 to 4126. [2020-12-22 08:18:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4126 states. [2020-12-22 08:18:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4126 states to 4126 states and 5658 transitions. [2020-12-22 08:18:56,065 INFO L78 Accepts]: Start accepts. Automaton has 4126 states and 5658 transitions. Word has length 63 [2020-12-22 08:18:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:56,065 INFO L481 AbstractCegarLoop]: Abstraction has 4126 states and 5658 transitions. [2020-12-22 08:18:56,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 08:18:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4126 states and 5658 transitions. [2020-12-22 08:18:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:18:56,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:56,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:56,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:18:56,068 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash -37454644, now seen corresponding path program 1 times [2020-12-22 08:18:56,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:56,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093226997] [2020-12-22 08:18:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:56,103 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 08:18:56,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093226997] [2020-12-22 08:18:56,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:56,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905387598] [2020-12-22 08:18:56,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:56,105 INFO L87 Difference]: Start difference. First operand 4126 states and 5658 transitions. Second operand 3 states. [2020-12-22 08:18:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:57,277 INFO L93 Difference]: Finished difference Result 7691 states and 10614 transitions. [2020-12-22 08:18:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:57,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:18:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:57,284 INFO L225 Difference]: With dead ends: 7691 [2020-12-22 08:18:57,284 INFO L226 Difference]: Without dead ends: 5852 [2020-12-22 08:18:57,287 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 08:18:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2020-12-22 08:18:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 3952. [2020-12-22 08:18:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3952 states. [2020-12-22 08:18:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 5417 transitions. [2020-12-22 08:18:58,002 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 5417 transitions. Word has length 63 [2020-12-22 08:18:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:58,003 INFO L481 AbstractCegarLoop]: Abstraction has 3952 states and 5417 transitions. [2020-12-22 08:18:58,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 5417 transitions. [2020-12-22 08:18:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:18:58,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:58,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:58,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:18:58,005 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1257573082, now seen corresponding path program 1 times [2020-12-22 08:18:58,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:58,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136346110] [2020-12-22 08:18:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:58,044 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 08:18:58,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136346110] [2020-12-22 08:18:58,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:58,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954955579] [2020-12-22 08:18:58,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:58,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:58,046 INFO L87 Difference]: Start difference. First operand 3952 states and 5417 transitions. Second operand 3 states. [2020-12-22 08:18:59,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:59,144 INFO L93 Difference]: Finished difference Result 7089 states and 9784 transitions. [2020-12-22 08:18:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:59,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:18:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:59,152 INFO L225 Difference]: With dead ends: 7089 [2020-12-22 08:18:59,152 INFO L226 Difference]: Without dead ends: 5586 [2020-12-22 08:18:59,156 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 08:18:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2020-12-22 08:18:59,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 3843. [2020-12-22 08:18:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3843 states. [2020-12-22 08:18:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 5266 transitions. [2020-12-22 08:18:59,965 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 5266 transitions. Word has length 63 [2020-12-22 08:18:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:59,965 INFO L481 AbstractCegarLoop]: Abstraction has 3843 states and 5266 transitions. [2020-12-22 08:18:59,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 5266 transitions. [2020-12-22 08:18:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:18:59,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:59,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:18:59,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:18:59,968 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash -59873296, now seen corresponding path program 1 times [2020-12-22 08:18:59,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:59,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561607193] [2020-12-22 08:18:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:00,669 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 08:19:00,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561607193] [2020-12-22 08:19:00,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:00,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-12-22 08:19:00,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697980475] [2020-12-22 08:19:00,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:19:00,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:00,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:19:00,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:19:00,671 INFO L87 Difference]: Start difference. First operand 3843 states and 5266 transitions. Second operand 17 states. [2020-12-22 08:19:01,479 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-22 08:19:01,677 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 08:19:01,883 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-22 08:19:02,112 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 08:19:02,333 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 08:19:02,564 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 08:19:02,720 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:19:02,978 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-12-22 08:19:03,160 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 08:19:03,322 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:19:03,532 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-22 08:19:03,736 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-12-22 08:19:04,028 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-12-22 08:19:04,179 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:19:04,420 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:19:04,668 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-12-22 08:19:04,892 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 08:19:05,151 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-22 08:19:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:10,604 INFO L93 Difference]: Finished difference Result 13918 states and 19299 transitions. [2020-12-22 08:19:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 08:19:10,605 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-12-22 08:19:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:10,619 INFO L225 Difference]: With dead ends: 13918 [2020-12-22 08:19:10,619 INFO L226 Difference]: Without dead ends: 13334 [2020-12-22 08:19:10,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=441, Invalid=1629, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:19:10,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13334 states. [2020-12-22 08:19:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13334 to 3793. [2020-12-22 08:19:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3793 states. [2020-12-22 08:19:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 5195 transitions. [2020-12-22 08:19:11,599 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 5195 transitions. Word has length 64 [2020-12-22 08:19:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:11,599 INFO L481 AbstractCegarLoop]: Abstraction has 3793 states and 5195 transitions. [2020-12-22 08:19:11,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:19:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 5195 transitions. [2020-12-22 08:19:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:19:11,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:11,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:11,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:19:11,601 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:11,602 INFO L82 PathProgramCache]: Analyzing trace with hash -260780432, now seen corresponding path program 1 times [2020-12-22 08:19:11,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:11,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923408727] [2020-12-22 08:19:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:12,580 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 08:19:12,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923408727] [2020-12-22 08:19:12,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:12,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-12-22 08:19:12,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871489277] [2020-12-22 08:19:12,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 08:19:12,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 08:19:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-12-22 08:19:12,583 INFO L87 Difference]: Start difference. First operand 3793 states and 5195 transitions. Second operand 18 states. [2020-12-22 08:19:12,731 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 08:19:13,285 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-12-22 08:19:13,479 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:19:13,751 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 08:19:13,976 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-12-22 08:19:14,537 WARN L197 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-12-22 08:19:15,106 WARN L197 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2020-12-22 08:19:15,365 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 08:19:15,759 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 08:19:15,900 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-12-22 08:19:16,220 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 08:19:16,603 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-22 08:19:17,033 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 08:19:17,252 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-22 08:19:17,728 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 08:19:18,024 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-12-22 08:19:18,269 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 08:19:18,569 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-22 08:19:18,838 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-22 08:19:19,125 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-12-22 08:19:19,431 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-12-22 08:19:21,092 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 08:19:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:26,831 INFO L93 Difference]: Finished difference Result 13705 states and 19001 transitions. [2020-12-22 08:19:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 08:19:26,832 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-12-22 08:19:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:26,846 INFO L225 Difference]: With dead ends: 13705 [2020-12-22 08:19:26,846 INFO L226 Difference]: Without dead ends: 13365 [2020-12-22 08:19:26,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=465, Invalid=1605, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 08:19:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13365 states. [2020-12-22 08:19:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13365 to 3767. [2020-12-22 08:19:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3767 states. [2020-12-22 08:19:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 5159 transitions. [2020-12-22 08:19:27,928 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 5159 transitions. Word has length 64 [2020-12-22 08:19:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:27,928 INFO L481 AbstractCegarLoop]: Abstraction has 3767 states and 5159 transitions. [2020-12-22 08:19:27,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 08:19:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 5159 transitions. [2020-12-22 08:19:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:19:27,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:27,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:27,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:19:27,930 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1695928295, now seen corresponding path program 1 times [2020-12-22 08:19:27,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:27,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823602332] [2020-12-22 08:19:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:28,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823602332] [2020-12-22 08:19:28,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:28,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:19:28,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550843489] [2020-12-22 08:19:28,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:19:28,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:19:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:28,018 INFO L87 Difference]: Start difference. First operand 3767 states and 5159 transitions. Second operand 5 states. [2020-12-22 08:19:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:29,055 INFO L93 Difference]: Finished difference Result 3773 states and 5162 transitions. [2020-12-22 08:19:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:19:29,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 08:19:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:29,059 INFO L225 Difference]: With dead ends: 3773 [2020-12-22 08:19:29,059 INFO L226 Difference]: Without dead ends: 3497 [2020-12-22 08:19:29,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:19:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2020-12-22 08:19:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3493. [2020-12-22 08:19:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3493 states. [2020-12-22 08:19:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 4791 transitions. [2020-12-22 08:19:29,992 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 4791 transitions. Word has length 65 [2020-12-22 08:19:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:29,992 INFO L481 AbstractCegarLoop]: Abstraction has 3493 states and 4791 transitions. [2020-12-22 08:19:29,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:19:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 4791 transitions. [2020-12-22 08:19:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:19:29,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:29,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:29,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:19:29,994 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1507814999, now seen corresponding path program 1 times [2020-12-22 08:19:29,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:29,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403634646] [2020-12-22 08:19:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:30,033 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 08:19:30,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403634646] [2020-12-22 08:19:30,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:30,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:30,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093133002] [2020-12-22 08:19:30,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:30,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:30,035 INFO L87 Difference]: Start difference. First operand 3493 states and 4791 transitions. Second operand 3 states. [2020-12-22 08:19:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:31,777 INFO L93 Difference]: Finished difference Result 9127 states and 12627 transitions. [2020-12-22 08:19:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:31,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:19:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:31,784 INFO L225 Difference]: With dead ends: 9127 [2020-12-22 08:19:31,784 INFO L226 Difference]: Without dead ends: 6167 [2020-12-22 08:19:31,787 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 08:19:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6167 states. [2020-12-22 08:19:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6167 to 5784. [2020-12-22 08:19:33,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5784 states. [2020-12-22 08:19:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5784 states to 5784 states and 7955 transitions. [2020-12-22 08:19:33,390 INFO L78 Accepts]: Start accepts. Automaton has 5784 states and 7955 transitions. Word has length 68 [2020-12-22 08:19:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:33,391 INFO L481 AbstractCegarLoop]: Abstraction has 5784 states and 7955 transitions. [2020-12-22 08:19:33,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5784 states and 7955 transitions. [2020-12-22 08:19:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:19:33,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:33,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:33,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 08:19:33,393 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:33,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1724760844, now seen corresponding path program 1 times [2020-12-22 08:19:33,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:33,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185420584] [2020-12-22 08:19:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:33,435 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 08:19:33,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185420584] [2020-12-22 08:19:33,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:33,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:33,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420805758] [2020-12-22 08:19:33,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:33,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:33,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:33,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:33,437 INFO L87 Difference]: Start difference. First operand 5784 states and 7955 transitions. Second operand 3 states. [2020-12-22 08:19:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:36,554 INFO L93 Difference]: Finished difference Result 15736 states and 21717 transitions. [2020-12-22 08:19:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:36,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 08:19:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:36,568 INFO L225 Difference]: With dead ends: 15736 [2020-12-22 08:19:36,568 INFO L226 Difference]: Without dead ends: 10485 [2020-12-22 08:19:36,575 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 08:19:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2020-12-22 08:19:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 9703. [2020-12-22 08:19:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9703 states. [2020-12-22 08:19:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9703 states to 9703 states and 13320 transitions. [2020-12-22 08:19:39,408 INFO L78 Accepts]: Start accepts. Automaton has 9703 states and 13320 transitions. Word has length 69 [2020-12-22 08:19:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:39,408 INFO L481 AbstractCegarLoop]: Abstraction has 9703 states and 13320 transitions. [2020-12-22 08:19:39,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:19:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 9703 states and 13320 transitions. [2020-12-22 08:19:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:19:39,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:39,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:39,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 08:19:39,410 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:39,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1274692746, now seen corresponding path program 1 times [2020-12-22 08:19:39,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:39,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624769389] [2020-12-22 08:19:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:39,506 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 08:19:39,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624769389] [2020-12-22 08:19:39,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:39,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:19:39,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288183086] [2020-12-22 08:19:39,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:19:39,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:19:39,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:19:39,508 INFO L87 Difference]: Start difference. First operand 9703 states and 13320 transitions. Second operand 6 states. [2020-12-22 08:19:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:45,864 INFO L93 Difference]: Finished difference Result 19787 states and 26739 transitions. [2020-12-22 08:19:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:19:45,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-12-22 08:19:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:45,883 INFO L225 Difference]: With dead ends: 19787 [2020-12-22 08:19:45,883 INFO L226 Difference]: Without dead ends: 19785 [2020-12-22 08:19:45,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:19:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19785 states. [2020-12-22 08:19:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19785 to 10411. [2020-12-22 08:19:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10411 states. [2020-12-22 08:19:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10411 states to 10411 states and 14028 transitions. [2020-12-22 08:19:49,197 INFO L78 Accepts]: Start accepts. Automaton has 10411 states and 14028 transitions. Word has length 72 [2020-12-22 08:19:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:49,197 INFO L481 AbstractCegarLoop]: Abstraction has 10411 states and 14028 transitions. [2020-12-22 08:19:49,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:19:49,198 INFO L276 IsEmpty]: Start isEmpty. Operand 10411 states and 14028 transitions. [2020-12-22 08:19:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:19:49,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:49,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:19:49,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 08:19:49,199 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:49,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1392355153, now seen corresponding path program 1 times [2020-12-22 08:19:49,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:49,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337653705] [2020-12-22 08:19:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:49,244 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 08:19:49,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337653705] [2020-12-22 08:19:49,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:19:49,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:19:49,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45215826] [2020-12-22 08:19:49,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:19:49,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:19:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:19:49,246 INFO L87 Difference]: Start difference. First operand 10411 states and 14028 transitions. Second operand 3 states. [2020-12-22 08:19:55,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:55,126 INFO L93 Difference]: Finished difference Result 28051 states and 37534 transitions. [2020-12-22 08:19:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:19:55,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:19:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:55,145 INFO L225 Difference]: With dead ends: 28051 [2020-12-22 08:19:55,145 INFO L226 Difference]: Without dead ends: 18081 [2020-12-22 08:19:55,156 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 08:19:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18081 states. [2020-12-22 08:20:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18081 to 17799. [2020-12-22 08:20:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17799 states. [2020-12-22 08:20:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17799 states to 17799 states and 23210 transitions. [2020-12-22 08:20:00,973 INFO L78 Accepts]: Start accepts. Automaton has 17799 states and 23210 transitions. Word has length 73 [2020-12-22 08:20:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:00,973 INFO L481 AbstractCegarLoop]: Abstraction has 17799 states and 23210 transitions. [2020-12-22 08:20:00,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 17799 states and 23210 transitions. [2020-12-22 08:20:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 08:20:00,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:00,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:00,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 08:20:00,976 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2638653, now seen corresponding path program 1 times [2020-12-22 08:20:00,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:00,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926868389] [2020-12-22 08:20:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:01,018 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 08:20:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926868389] [2020-12-22 08:20:01,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:01,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:01,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283378030] [2020-12-22 08:20:01,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:01,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:01,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:01,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:01,020 INFO L87 Difference]: Start difference. First operand 17799 states and 23210 transitions. Second operand 3 states. [2020-12-22 08:20:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:10,648 INFO L93 Difference]: Finished difference Result 45239 states and 58890 transitions. [2020-12-22 08:20:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:20:10,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 08:20:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:10,680 INFO L225 Difference]: With dead ends: 45239 [2020-12-22 08:20:10,680 INFO L226 Difference]: Without dead ends: 27865 [2020-12-22 08:20:10,696 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 08:20:10,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27865 states. [2020-12-22 08:20:19,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27865 to 25279. [2020-12-22 08:20:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25279 states. [2020-12-22 08:20:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25279 states to 25279 states and 32660 transitions. [2020-12-22 08:20:19,471 INFO L78 Accepts]: Start accepts. Automaton has 25279 states and 32660 transitions. Word has length 74 [2020-12-22 08:20:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:19,471 INFO L481 AbstractCegarLoop]: Abstraction has 25279 states and 32660 transitions. [2020-12-22 08:20:19,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:20:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 25279 states and 32660 transitions. [2020-12-22 08:20:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 08:20:19,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:19,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:19,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 08:20:19,477 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash -786165995, now seen corresponding path program 1 times [2020-12-22 08:20:19,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:19,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523835283] [2020-12-22 08:20:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:19,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523835283] [2020-12-22 08:20:19,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954033320] [2020-12-22 08:20:19,757 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 08:20:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:20,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 08:20:20,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:20:20,438 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:20:20,562 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:20:20,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:20:20,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:20:20,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 08:20:20,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 08:20:21,173 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 36 [2020-12-22 08:20:21,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:20:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:21,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:20:21,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2020-12-22 08:20:21,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921431198] [2020-12-22 08:20:21,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 08:20:21,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:21,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 08:20:21,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:20:21,521 INFO L87 Difference]: Start difference. First operand 25279 states and 32660 transitions. Second operand 21 states. [2020-12-22 08:20:21,667 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-12-22 08:20:23,398 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2020-12-22 08:20:24,007 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-12-22 08:20:24,150 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2020-12-22 08:20:24,449 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-12-22 08:20:25,046 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2020-12-22 08:20:25,573 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2020-12-22 08:20:26,022 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-12-22 08:20:26,531 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-12-22 08:20:27,858 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-22 08:20:28,280 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-12-22 08:20:28,511 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-12-22 08:20:28,704 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-12-22 08:20:29,260 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-12-22 08:20:29,898 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-12-22 08:20:30,210 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-12-22 08:20:30,679 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-12-22 08:20:30,902 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-12-22 08:20:31,171 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-12-22 08:20:32,512 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-12-22 08:20:32,883 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-12-22 08:20:33,040 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-12-22 08:20:33,327 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2020-12-22 08:20:34,322 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-12-22 08:20:34,479 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-12-22 08:20:35,577 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-12-22 08:20:36,491 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2020-12-22 08:20:36,838 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-12-22 08:20:38,552 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-12-22 08:20:40,628 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-12-22 08:20:40,832 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-12-22 08:20:41,703 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-12-22 08:20:42,504 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-22 08:20:43,426 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-12-22 08:20:45,474 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2020-12-22 08:20:46,458 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-12-22 08:20:46,628 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-12-22 08:20:48,400 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-12-22 08:20:48,569 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-12-22 08:20:50,835 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-12-22 08:20:51,007 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-12-22 08:20:51,931 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-12-22 08:20:52,127 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-12-22 08:20:53,226 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-22 08:20:53,395 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-12-22 08:20:54,800 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-12-22 08:20:55,707 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-22 08:20:55,894 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-12-22 08:20:56,072 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 08:20:56,268 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-12-22 08:20:56,551 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-12-22 08:20:56,720 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-12-22 08:20:57,918 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-12-22 08:20:58,208 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-12-22 08:20:58,437 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-12-22 08:20:58,588 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-12-22 08:20:58,813 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-12-22 08:20:58,978 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-22 08:21:00,353 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-12-22 08:21:00,598 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-12-22 08:21:13,587 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2020-12-22 08:21:39,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:21:39,657 INFO L93 Difference]: Finished difference Result 136508 states and 173215 transitions. [2020-12-22 08:21:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2020-12-22 08:21:39,658 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 92 [2020-12-22 08:21:39,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:21:40,188 INFO L225 Difference]: With dead ends: 136508 [2020-12-22 08:21:40,189 INFO L226 Difference]: Without dead ends: 120156 [2020-12-22 08:21:40,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11993 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=4411, Invalid=26389, Unknown=0, NotChecked=0, Total=30800 [2020-12-22 08:21:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120156 states.