/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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:04:14,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:04:14,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:04:14,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:04:14,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:04:14,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:04:14,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:04:14,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:04:14,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:04:14,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:04:14,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:04:14,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:04:14,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:04:14,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:04:14,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:04:14,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:04:14,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:04:14,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:04:14,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:04:14,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:04:14,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:04:14,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:04:14,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:04:14,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:04:14,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:04:14,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:04:14,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:04:14,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:04:14,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:04:14,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:04:14,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:04:14,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:04:14,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:04:14,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:04:14,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:04:14,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:04:14,860 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:04:14,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:04:14,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:04:14,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:04:14,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:04:14,922 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:04:14,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:04:14,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:04:14,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:04:14,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:04:14,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:04:14,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:04:14,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:04:14,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:04:14,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:04:14,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:04:14,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:04:14,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:04:14,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:04:14,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:04:14,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:04:14,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:04:14,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:04:14,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:04:14,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:04:14,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:04:14,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:04:15,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:04:15,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:04:15,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:04:15,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:04:15,415 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:04:15,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:04:15,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e1868a2d/16574768acef452bb06111e7daeb06b7/FLAGc3c701d2e [2020-12-22 09:04:16,315 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:04:16,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:04:16,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e1868a2d/16574768acef452bb06111e7daeb06b7/FLAGc3c701d2e [2020-12-22 09:04:16,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e1868a2d/16574768acef452bb06111e7daeb06b7 [2020-12-22 09:04:16,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:04:16,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:04:16,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:04:16,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:04:16,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:04:16,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:04:16" (1/1) ... [2020-12-22 09:04:16,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7f175f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:16, skipping insertion in model container [2020-12-22 09:04:16,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:04:16" (1/1) ... [2020-12-22 09:04:16,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:04:16,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:04:17,038 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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15036,15049] [2020-12-22 09:04:17,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:04:17,168 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:04:17,481 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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[15036,15049] [2020-12-22 09:04:17,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:04:17,640 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:04:17,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17 WrapperNode [2020-12-22 09:04:17,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:04:17,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:04:17,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:04:17,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:04:17,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:04:17,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:04:17,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:04:17,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:04:17,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... [2020-12-22 09:04:17,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:04:17,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:04:17,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:04:17,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:04:17,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:04:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:04:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:04:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:04:17,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:04:19,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:04:19,225 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:04:19,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:04:19 BoogieIcfgContainer [2020-12-22 09:04:19,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:04:19,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:04:19,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:04:19,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:04:19,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:04:16" (1/3) ... [2020-12-22 09:04:19,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127c00a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:04:19, skipping insertion in model container [2020-12-22 09:04:19,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:04:17" (2/3) ... [2020-12-22 09:04:19,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127c00a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:04:19, skipping insertion in model container [2020-12-22 09:04:19,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:04:19" (3/3) ... [2020-12-22 09:04:19,251 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:04:19,261 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:04:19,275 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:04:19,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:04:19,356 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:04:19,357 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:04:19,357 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:04:19,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:04:19,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:04:19,357 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:04:19,358 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:04:19,358 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:04:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states. [2020-12-22 09:04:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 09:04:19,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:19,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:19,409 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:19,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1173717287, now seen corresponding path program 1 times [2020-12-22 09:04:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:19,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570804500] [2020-12-22 09:04:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570804500] [2020-12-22 09:04:20,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:20,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:20,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393966729] [2020-12-22 09:04:20,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:20,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:20,207 INFO L87 Difference]: Start difference. First operand 331 states. Second operand 3 states. [2020-12-22 09:04:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:20,415 INFO L93 Difference]: Finished difference Result 640 states and 1112 transitions. [2020-12-22 09:04:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:20,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2020-12-22 09:04:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:20,440 INFO L225 Difference]: With dead ends: 640 [2020-12-22 09:04:20,441 INFO L226 Difference]: Without dead ends: 523 [2020-12-22 09:04:20,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-12-22 09:04:20,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 521. [2020-12-22 09:04:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-12-22 09:04:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 776 transitions. [2020-12-22 09:04:20,576 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 776 transitions. Word has length 152 [2020-12-22 09:04:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:20,577 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 776 transitions. [2020-12-22 09:04:20,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 776 transitions. [2020-12-22 09:04:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 09:04:20,586 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:20,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:20,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:04:20,587 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:20,588 INFO L82 PathProgramCache]: Analyzing trace with hash 341515684, now seen corresponding path program 1 times [2020-12-22 09:04:20,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:20,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838095912] [2020-12-22 09:04:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:20,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838095912] [2020-12-22 09:04:20,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:20,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328596137] [2020-12-22 09:04:20,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:20,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:20,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:20,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:20,967 INFO L87 Difference]: Start difference. First operand 521 states and 776 transitions. Second operand 4 states. [2020-12-22 09:04:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:21,103 INFO L93 Difference]: Finished difference Result 1528 states and 2269 transitions. [2020-12-22 09:04:21,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:21,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2020-12-22 09:04:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:21,111 INFO L225 Difference]: With dead ends: 1528 [2020-12-22 09:04:21,112 INFO L226 Difference]: Without dead ends: 1016 [2020-12-22 09:04:21,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2020-12-22 09:04:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1014. [2020-12-22 09:04:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1014 states. [2020-12-22 09:04:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1497 transitions. [2020-12-22 09:04:21,190 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1497 transitions. Word has length 152 [2020-12-22 09:04:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:21,192 INFO L481 AbstractCegarLoop]: Abstraction has 1014 states and 1497 transitions. [2020-12-22 09:04:21,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1497 transitions. [2020-12-22 09:04:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 09:04:21,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:21,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:21,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:04:21,208 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:21,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1004817416, now seen corresponding path program 1 times [2020-12-22 09:04:21,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:21,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735245691] [2020-12-22 09:04:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:21,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735245691] [2020-12-22 09:04:21,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115191581] [2020-12-22 09:04:21,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:21,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:21,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:21,363 INFO L87 Difference]: Start difference. First operand 1014 states and 1497 transitions. Second operand 3 states. [2020-12-22 09:04:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:21,463 INFO L93 Difference]: Finished difference Result 3004 states and 4429 transitions. [2020-12-22 09:04:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:21,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2020-12-22 09:04:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:21,475 INFO L225 Difference]: With dead ends: 3004 [2020-12-22 09:04:21,475 INFO L226 Difference]: Without dead ends: 2018 [2020-12-22 09:04:21,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:21,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2020-12-22 09:04:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1016. [2020-12-22 09:04:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2020-12-22 09:04:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1499 transitions. [2020-12-22 09:04:21,546 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1499 transitions. Word has length 153 [2020-12-22 09:04:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:21,547 INFO L481 AbstractCegarLoop]: Abstraction has 1016 states and 1499 transitions. [2020-12-22 09:04:21,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1499 transitions. [2020-12-22 09:04:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 09:04:21,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:21,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:21,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:04:21,551 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:21,551 INFO L82 PathProgramCache]: Analyzing trace with hash -703528603, now seen corresponding path program 1 times [2020-12-22 09:04:21,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:21,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57666443] [2020-12-22 09:04:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:21,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57666443] [2020-12-22 09:04:21,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:21,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:21,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232157604] [2020-12-22 09:04:21,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:21,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:21,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:21,776 INFO L87 Difference]: Start difference. First operand 1016 states and 1499 transitions. Second operand 4 states. [2020-12-22 09:04:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:22,047 INFO L93 Difference]: Finished difference Result 2934 states and 4309 transitions. [2020-12-22 09:04:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:22,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-12-22 09:04:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:22,068 INFO L225 Difference]: With dead ends: 2934 [2020-12-22 09:04:22,069 INFO L226 Difference]: Without dead ends: 1948 [2020-12-22 09:04:22,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2020-12-22 09:04:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1946. [2020-12-22 09:04:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1946 states. [2020-12-22 09:04:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2834 transitions. [2020-12-22 09:04:22,286 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2834 transitions. Word has length 154 [2020-12-22 09:04:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:22,290 INFO L481 AbstractCegarLoop]: Abstraction has 1946 states and 2834 transitions. [2020-12-22 09:04:22,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2834 transitions. [2020-12-22 09:04:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 09:04:22,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:22,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:22,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:04:22,299 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1206556903, now seen corresponding path program 1 times [2020-12-22 09:04:22,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:22,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361212684] [2020-12-22 09:04:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:22,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361212684] [2020-12-22 09:04:22,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:22,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:22,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905528521] [2020-12-22 09:04:22,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:22,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:22,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:22,440 INFO L87 Difference]: Start difference. First operand 1946 states and 2834 transitions. Second operand 3 states. [2020-12-22 09:04:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:22,692 INFO L93 Difference]: Finished difference Result 5762 states and 8382 transitions. [2020-12-22 09:04:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:22,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 155 [2020-12-22 09:04:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:22,715 INFO L225 Difference]: With dead ends: 5762 [2020-12-22 09:04:22,715 INFO L226 Difference]: Without dead ends: 3860 [2020-12-22 09:04:22,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2020-12-22 09:04:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 1950. [2020-12-22 09:04:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1950 states. [2020-12-22 09:04:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 2838 transitions. [2020-12-22 09:04:22,956 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 2838 transitions. Word has length 155 [2020-12-22 09:04:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:22,957 INFO L481 AbstractCegarLoop]: Abstraction has 1950 states and 2838 transitions. [2020-12-22 09:04:22,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 2838 transitions. [2020-12-22 09:04:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 09:04:22,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:22,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:22,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:04:22,963 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash 109885862, now seen corresponding path program 1 times [2020-12-22 09:04:22,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:22,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992432920] [2020-12-22 09:04:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:23,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992432920] [2020-12-22 09:04:23,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:23,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:23,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613972599] [2020-12-22 09:04:23,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:23,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:23,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:23,189 INFO L87 Difference]: Start difference. First operand 1950 states and 2838 transitions. Second operand 4 states. [2020-12-22 09:04:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:23,571 INFO L93 Difference]: Finished difference Result 5638 states and 8174 transitions. [2020-12-22 09:04:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:23,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 156 [2020-12-22 09:04:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:23,589 INFO L225 Difference]: With dead ends: 5638 [2020-12-22 09:04:23,589 INFO L226 Difference]: Without dead ends: 3736 [2020-12-22 09:04:23,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2020-12-22 09:04:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3734. [2020-12-22 09:04:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3734 states. [2020-12-22 09:04:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 5360 transitions. [2020-12-22 09:04:23,888 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 5360 transitions. Word has length 156 [2020-12-22 09:04:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:23,889 INFO L481 AbstractCegarLoop]: Abstraction has 3734 states and 5360 transitions. [2020-12-22 09:04:23,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 5360 transitions. [2020-12-22 09:04:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 09:04:23,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:23,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:23,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:04:23,897 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:23,897 INFO L82 PathProgramCache]: Analyzing trace with hash -289159494, now seen corresponding path program 1 times [2020-12-22 09:04:23,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:23,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811586936] [2020-12-22 09:04:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:23,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811586936] [2020-12-22 09:04:23,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:23,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:23,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531102927] [2020-12-22 09:04:23,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:23,980 INFO L87 Difference]: Start difference. First operand 3734 states and 5360 transitions. Second operand 3 states. [2020-12-22 09:04:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:24,488 INFO L93 Difference]: Finished difference Result 10770 states and 15502 transitions. [2020-12-22 09:04:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:24,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2020-12-22 09:04:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:24,526 INFO L225 Difference]: With dead ends: 10770 [2020-12-22 09:04:24,526 INFO L226 Difference]: Without dead ends: 7376 [2020-12-22 09:04:24,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2020-12-22 09:04:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 3742. [2020-12-22 09:04:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3742 states. [2020-12-22 09:04:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 5368 transitions. [2020-12-22 09:04:24,937 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 5368 transitions. Word has length 157 [2020-12-22 09:04:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:24,937 INFO L481 AbstractCegarLoop]: Abstraction has 3742 states and 5368 transitions. [2020-12-22 09:04:24,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 5368 transitions. [2020-12-22 09:04:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 09:04:24,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:24,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:24,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:04:24,945 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash 405722455, now seen corresponding path program 1 times [2020-12-22 09:04:24,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:24,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312129807] [2020-12-22 09:04:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:25,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312129807] [2020-12-22 09:04:25,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:25,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:04:25,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870355263] [2020-12-22 09:04:25,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:04:25,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:25,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:04:25,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:25,167 INFO L87 Difference]: Start difference. First operand 3742 states and 5368 transitions. Second operand 5 states. [2020-12-22 09:04:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:25,806 INFO L93 Difference]: Finished difference Result 10856 states and 15513 transitions. [2020-12-22 09:04:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:25,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-12-22 09:04:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:25,857 INFO L225 Difference]: With dead ends: 10856 [2020-12-22 09:04:25,857 INFO L226 Difference]: Without dead ends: 7202 [2020-12-22 09:04:25,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7202 states. [2020-12-22 09:04:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7202 to 7200. [2020-12-22 09:04:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7200 states. [2020-12-22 09:04:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 10185 transitions. [2020-12-22 09:04:26,512 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 10185 transitions. Word has length 158 [2020-12-22 09:04:26,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:26,512 INFO L481 AbstractCegarLoop]: Abstraction has 7200 states and 10185 transitions. [2020-12-22 09:04:26,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:04:26,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 10185 transitions. [2020-12-22 09:04:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 09:04:26,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:26,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:26,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:04:26,525 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:26,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:26,525 INFO L82 PathProgramCache]: Analyzing trace with hash 427918951, now seen corresponding path program 1 times [2020-12-22 09:04:26,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:26,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725512499] [2020-12-22 09:04:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:26,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725512499] [2020-12-22 09:04:26,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:26,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:26,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539615768] [2020-12-22 09:04:26,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:26,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:26,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:26,706 INFO L87 Difference]: Start difference. First operand 7200 states and 10185 transitions. Second operand 4 states. [2020-12-22 09:04:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:27,170 INFO L93 Difference]: Finished difference Result 12624 states and 17845 transitions. [2020-12-22 09:04:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:27,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-12-22 09:04:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:27,188 INFO L225 Difference]: With dead ends: 12624 [2020-12-22 09:04:27,189 INFO L226 Difference]: Without dead ends: 5498 [2020-12-22 09:04:27,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5498 states. [2020-12-22 09:04:27,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5498 to 5498. [2020-12-22 09:04:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5498 states. [2020-12-22 09:04:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5498 states to 5498 states and 7763 transitions. [2020-12-22 09:04:27,810 INFO L78 Accepts]: Start accepts. Automaton has 5498 states and 7763 transitions. Word has length 158 [2020-12-22 09:04:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:27,811 INFO L481 AbstractCegarLoop]: Abstraction has 5498 states and 7763 transitions. [2020-12-22 09:04:27,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5498 states and 7763 transitions. [2020-12-22 09:04:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 09:04:27,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:27,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:27,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:04:27,821 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash -479009960, now seen corresponding path program 1 times [2020-12-22 09:04:27,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287455269] [2020-12-22 09:04:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:27,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287455269] [2020-12-22 09:04:27,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:27,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:27,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287166712] [2020-12-22 09:04:27,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:27,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:27,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:27,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:27,926 INFO L87 Difference]: Start difference. First operand 5498 states and 7763 transitions. Second operand 3 states. [2020-12-22 09:04:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:28,526 INFO L93 Difference]: Finished difference Result 12146 states and 17705 transitions. [2020-12-22 09:04:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:28,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-12-22 09:04:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:28,545 INFO L225 Difference]: With dead ends: 12146 [2020-12-22 09:04:28,545 INFO L226 Difference]: Without dead ends: 7260 [2020-12-22 09:04:28,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7260 states. [2020-12-22 09:04:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7260 to 7114. [2020-12-22 09:04:29,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7114 states. [2020-12-22 09:04:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7114 states to 7114 states and 10371 transitions. [2020-12-22 09:04:29,136 INFO L78 Accepts]: Start accepts. Automaton has 7114 states and 10371 transitions. Word has length 159 [2020-12-22 09:04:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:29,137 INFO L481 AbstractCegarLoop]: Abstraction has 7114 states and 10371 transitions. [2020-12-22 09:04:29,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 7114 states and 10371 transitions. [2020-12-22 09:04:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 09:04:29,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:29,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:29,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:04:29,147 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:29,148 INFO L82 PathProgramCache]: Analyzing trace with hash -513222824, now seen corresponding path program 1 times [2020-12-22 09:04:29,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:29,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83079590] [2020-12-22 09:04:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:29,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83079590] [2020-12-22 09:04:29,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:29,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 09:04:29,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599562425] [2020-12-22 09:04:29,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 09:04:29,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 09:04:29,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:04:29,482 INFO L87 Difference]: Start difference. First operand 7114 states and 10371 transitions. Second operand 9 states. [2020-12-22 09:04:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:32,931 INFO L93 Difference]: Finished difference Result 31490 states and 47926 transitions. [2020-12-22 09:04:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 09:04:32,932 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 162 [2020-12-22 09:04:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:33,040 INFO L225 Difference]: With dead ends: 31490 [2020-12-22 09:04:33,041 INFO L226 Difference]: Without dead ends: 25126 [2020-12-22 09:04:33,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:04:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25126 states. [2020-12-22 09:04:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25126 to 17214. [2020-12-22 09:04:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17214 states. [2020-12-22 09:04:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17214 states to 17214 states and 25613 transitions. [2020-12-22 09:04:34,731 INFO L78 Accepts]: Start accepts. Automaton has 17214 states and 25613 transitions. Word has length 162 [2020-12-22 09:04:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:34,731 INFO L481 AbstractCegarLoop]: Abstraction has 17214 states and 25613 transitions. [2020-12-22 09:04:34,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 09:04:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 17214 states and 25613 transitions. [2020-12-22 09:04:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 09:04:34,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:34,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:34,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:04:34,747 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:34,747 INFO L82 PathProgramCache]: Analyzing trace with hash -707459681, now seen corresponding path program 1 times [2020-12-22 09:04:34,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:34,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458827434] [2020-12-22 09:04:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:34,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458827434] [2020-12-22 09:04:34,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:34,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:34,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191924327] [2020-12-22 09:04:34,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:34,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:34,911 INFO L87 Difference]: Start difference. First operand 17214 states and 25613 transitions. Second operand 4 states. [2020-12-22 09:04:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:36,345 INFO L93 Difference]: Finished difference Result 33258 states and 51099 transitions. [2020-12-22 09:04:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:36,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2020-12-22 09:04:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:36,402 INFO L225 Difference]: With dead ends: 33258 [2020-12-22 09:04:36,403 INFO L226 Difference]: Without dead ends: 21376 [2020-12-22 09:04:36,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21376 states. [2020-12-22 09:04:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21376 to 21374. [2020-12-22 09:04:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21374 states. [2020-12-22 09:04:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21374 states to 21374 states and 32025 transitions. [2020-12-22 09:04:38,296 INFO L78 Accepts]: Start accepts. Automaton has 21374 states and 32025 transitions. Word has length 162 [2020-12-22 09:04:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:38,296 INFO L481 AbstractCegarLoop]: Abstraction has 21374 states and 32025 transitions. [2020-12-22 09:04:38,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 21374 states and 32025 transitions. [2020-12-22 09:04:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 09:04:38,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:38,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:38,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:04:38,311 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:38,312 INFO L82 PathProgramCache]: Analyzing trace with hash -286071921, now seen corresponding path program 1 times [2020-12-22 09:04:38,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:38,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097887242] [2020-12-22 09:04:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:38,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097887242] [2020-12-22 09:04:38,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:38,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:38,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944455067] [2020-12-22 09:04:38,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:38,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:38,480 INFO L87 Difference]: Start difference. First operand 21374 states and 32025 transitions. Second operand 4 states. [2020-12-22 09:04:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:40,784 INFO L93 Difference]: Finished difference Result 56244 states and 84126 transitions. [2020-12-22 09:04:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:40,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2020-12-22 09:04:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:40,859 INFO L225 Difference]: With dead ends: 56244 [2020-12-22 09:04:40,860 INFO L226 Difference]: Without dead ends: 35002 [2020-12-22 09:04:40,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35002 states. [2020-12-22 09:04:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35002 to 35000. [2020-12-22 09:04:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35000 states. [2020-12-22 09:04:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35000 states to 35000 states and 51739 transitions. [2020-12-22 09:04:43,804 INFO L78 Accepts]: Start accepts. Automaton has 35000 states and 51739 transitions. Word has length 162 [2020-12-22 09:04:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:43,804 INFO L481 AbstractCegarLoop]: Abstraction has 35000 states and 51739 transitions. [2020-12-22 09:04:43,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 35000 states and 51739 transitions. [2020-12-22 09:04:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 09:04:43,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:43,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:43,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:04:43,824 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:43,825 INFO L82 PathProgramCache]: Analyzing trace with hash 540747690, now seen corresponding path program 1 times [2020-12-22 09:04:43,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:43,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798262476] [2020-12-22 09:04:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:43,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798262476] [2020-12-22 09:04:43,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:43,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:04:43,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302230851] [2020-12-22 09:04:43,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:04:43,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:43,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:04:43,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:04:43,972 INFO L87 Difference]: Start difference. First operand 35000 states and 51739 transitions. Second operand 4 states. [2020-12-22 09:04:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:46,402 INFO L93 Difference]: Finished difference Result 62916 states and 93045 transitions. [2020-12-22 09:04:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:04:46,403 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2020-12-22 09:04:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:46,461 INFO L225 Difference]: With dead ends: 62916 [2020-12-22 09:04:46,461 INFO L226 Difference]: Without dead ends: 35000 [2020-12-22 09:04:46,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:04:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35000 states. [2020-12-22 09:04:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35000 to 35000. [2020-12-22 09:04:49,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35000 states. [2020-12-22 09:04:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35000 states to 35000 states and 51738 transitions. [2020-12-22 09:04:49,345 INFO L78 Accepts]: Start accepts. Automaton has 35000 states and 51738 transitions. Word has length 164 [2020-12-22 09:04:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:49,345 INFO L481 AbstractCegarLoop]: Abstraction has 35000 states and 51738 transitions. [2020-12-22 09:04:49,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:04:49,345 INFO L276 IsEmpty]: Start isEmpty. Operand 35000 states and 51738 transitions. [2020-12-22 09:04:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-22 09:04:49,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:49,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:49,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:04:49,359 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:49,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:49,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1686107341, now seen corresponding path program 1 times [2020-12-22 09:04:49,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:49,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071276846] [2020-12-22 09:04:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:49,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071276846] [2020-12-22 09:04:49,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:49,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:49,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596193197] [2020-12-22 09:04:49,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:49,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:49,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:49,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:49,470 INFO L87 Difference]: Start difference. First operand 35000 states and 51738 transitions. Second operand 3 states. [2020-12-22 09:04:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:53,137 INFO L93 Difference]: Finished difference Result 87989 states and 130465 transitions. [2020-12-22 09:04:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:04:53,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2020-12-22 09:04:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:53,214 INFO L225 Difference]: With dead ends: 87989 [2020-12-22 09:04:53,214 INFO L226 Difference]: Without dead ends: 54467 [2020-12-22 09:04:53,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54467 states. [2020-12-22 09:04:57,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54467 to 54465. [2020-12-22 09:04:57,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54465 states. [2020-12-22 09:04:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54465 states to 54465 states and 79575 transitions. [2020-12-22 09:04:57,310 INFO L78 Accepts]: Start accepts. Automaton has 54465 states and 79575 transitions. Word has length 164 [2020-12-22 09:04:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:57,311 INFO L481 AbstractCegarLoop]: Abstraction has 54465 states and 79575 transitions. [2020-12-22 09:04:57,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:04:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 54465 states and 79575 transitions. [2020-12-22 09:04:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 09:04:57,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:57,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:04:57,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:04:57,332 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:57,333 INFO L82 PathProgramCache]: Analyzing trace with hash -578160281, now seen corresponding path program 1 times [2020-12-22 09:04:57,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:57,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845767322] [2020-12-22 09:04:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:04:57,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845767322] [2020-12-22 09:04:57,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:57,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:04:57,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249572327] [2020-12-22 09:04:57,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:04:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:04:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:04:57,415 INFO L87 Difference]: Start difference. First operand 54465 states and 79575 transitions. Second operand 3 states. [2020-12-22 09:05:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:03,288 INFO L93 Difference]: Finished difference Result 126465 states and 186745 transitions. [2020-12-22 09:05:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:03,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2020-12-22 09:05:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:03,417 INFO L225 Difference]: With dead ends: 126465 [2020-12-22 09:05:03,417 INFO L226 Difference]: Without dead ends: 82761 [2020-12-22 09:05:03,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:03,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82761 states. [2020-12-22 09:05:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82761 to 75831. [2020-12-22 09:05:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75831 states. [2020-12-22 09:05:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75831 states to 75831 states and 113043 transitions. [2020-12-22 09:05:09,872 INFO L78 Accepts]: Start accepts. Automaton has 75831 states and 113043 transitions. Word has length 168 [2020-12-22 09:05:09,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:09,872 INFO L481 AbstractCegarLoop]: Abstraction has 75831 states and 113043 transitions. [2020-12-22 09:05:09,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 75831 states and 113043 transitions. [2020-12-22 09:05:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 09:05:09,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:09,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:09,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:05:09,890 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash -643945913, now seen corresponding path program 1 times [2020-12-22 09:05:09,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:09,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425432100] [2020-12-22 09:05:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:09,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425432100] [2020-12-22 09:05:09,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:09,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:09,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229179000] [2020-12-22 09:05:09,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:09,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:09,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:09,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:09,958 INFO L87 Difference]: Start difference. First operand 75831 states and 113043 transitions. Second operand 3 states. [2020-12-22 09:05:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:21,000 INFO L93 Difference]: Finished difference Result 216233 states and 324643 transitions. [2020-12-22 09:05:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:05:21,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2020-12-22 09:05:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:21,333 INFO L225 Difference]: With dead ends: 216233 [2020-12-22 09:05:21,334 INFO L226 Difference]: Without dead ends: 149809 [2020-12-22 09:05:21,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149809 states. [2020-12-22 09:05:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149809 to 149807. [2020-12-22 09:05:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149807 states. [2020-12-22 09:05:33,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149807 states to 149807 states and 222567 transitions. [2020-12-22 09:05:33,400 INFO L78 Accepts]: Start accepts. Automaton has 149807 states and 222567 transitions. Word has length 168 [2020-12-22 09:05:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:33,401 INFO L481 AbstractCegarLoop]: Abstraction has 149807 states and 222567 transitions. [2020-12-22 09:05:33,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:05:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 149807 states and 222567 transitions. [2020-12-22 09:05:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-22 09:05:33,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:33,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:33,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:05:33,450 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:33,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2103295540, now seen corresponding path program 1 times [2020-12-22 09:05:33,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:33,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937632488] [2020-12-22 09:05:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:33,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937632488] [2020-12-22 09:05:33,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:33,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:05:33,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231240542] [2020-12-22 09:05:33,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:05:33,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:33,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:05:33,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:05:33,638 INFO L87 Difference]: Start difference. First operand 149807 states and 222567 transitions. Second operand 4 states. [2020-12-22 09:05:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:05:42,786 INFO L93 Difference]: Finished difference Result 266874 states and 396096 transitions. [2020-12-22 09:05:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:05:42,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 168 [2020-12-22 09:05:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:05:42,998 INFO L225 Difference]: With dead ends: 266874 [2020-12-22 09:05:42,998 INFO L226 Difference]: Without dead ends: 117125 [2020-12-22 09:05:43,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:05:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117125 states. [2020-12-22 09:05:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117125 to 117125. [2020-12-22 09:05:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117125 states. [2020-12-22 09:05:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117125 states to 117125 states and 173602 transitions. [2020-12-22 09:05:52,427 INFO L78 Accepts]: Start accepts. Automaton has 117125 states and 173602 transitions. Word has length 168 [2020-12-22 09:05:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:05:52,427 INFO L481 AbstractCegarLoop]: Abstraction has 117125 states and 173602 transitions. [2020-12-22 09:05:52,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:05:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 117125 states and 173602 transitions. [2020-12-22 09:05:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 09:05:52,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:05:52,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:05:52,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:05:52,457 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:05:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:05:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash 688068991, now seen corresponding path program 1 times [2020-12-22 09:05:52,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:05:52,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714689965] [2020-12-22 09:05:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:05:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:05:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:05:52,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714689965] [2020-12-22 09:05:52,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:05:52,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:05:52,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55995985] [2020-12-22 09:05:52,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:05:52,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:05:52,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:05:52,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:05:52,769 INFO L87 Difference]: Start difference. First operand 117125 states and 173602 transitions. Second operand 3 states. [2020-12-22 09:06:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:06:07,394 INFO L93 Difference]: Finished difference Result 295491 states and 441138 transitions. [2020-12-22 09:06:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:06:07,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-12-22 09:06:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:06:07,924 INFO L225 Difference]: With dead ends: 295491 [2020-12-22 09:06:07,924 INFO L226 Difference]: Without dead ends: 194573 [2020-12-22 09:06:08,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:06:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194573 states.