./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_9.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20a70402cc893fb2c7adec21ca8a267adc3c5cbb ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 20:14:33,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 20:14:33,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 20:14:33,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 20:14:33,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 20:14:33,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 20:14:33,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 20:14:33,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 20:14:33,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 20:14:33,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 20:14:33,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 20:14:33,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 20:14:33,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 20:14:33,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 20:14:33,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 20:14:33,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 20:14:33,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 20:14:33,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 20:14:33,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 20:14:33,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 20:14:33,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 20:14:33,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 20:14:33,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 20:14:33,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 20:14:33,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 20:14:33,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 20:14:33,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 20:14:33,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 20:14:33,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 20:14:33,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 20:14:33,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 20:14:33,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 20:14:33,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 20:14:33,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 20:14:33,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 20:14:33,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 20:14:33,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 20:14:33,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 20:14:33,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 20:14:33,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 20:14:33,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 20:14:33,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 20:14:33,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 20:14:33,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 20:14:33,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 20:14:33,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 20:14:33,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 20:14:33,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 20:14:33,844 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 20:14:33,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 20:14:33,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 20:14:33,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 20:14:33,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 20:14:33,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 20:14:33,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 20:14:33,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 20:14:33,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 20:14:33,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 20:14:33,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 20:14:33,847 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 20:14:33,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 20:14:33,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 20:14:33,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 20:14:33,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 20:14:33,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:14:33,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 20:14:33,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 20:14:33,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 20:14:33,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 20:14:33,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 20:14:33,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 20:14:33,848 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 20:14:33,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20a70402cc893fb2c7adec21ca8a267adc3c5cbb [2021-08-25 20:14:34,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 20:14:34,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 20:14:34,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 20:14:34,152 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 20:14:34,153 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 20:14:34,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_9.c [2021-08-25 20:14:34,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83553dd8e/09a2ccef6cb94c659feb01754f17790d/FLAG23ca41b64 [2021-08-25 20:14:34,611 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 20:14:34,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_9.c [2021-08-25 20:14:34,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83553dd8e/09a2ccef6cb94c659feb01754f17790d/FLAG23ca41b64 [2021-08-25 20:14:34,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83553dd8e/09a2ccef6cb94c659feb01754f17790d [2021-08-25 20:14:34,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 20:14:34,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 20:14:34,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 20:14:34,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 20:14:34,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 20:14:34,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1480f3a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34, skipping insertion in model container [2021-08-25 20:14:34,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 20:14:34,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 20:14:34,795 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-08-25 20:14:34,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:14:34,807 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 20:14:34,847 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-08-25 20:14:34,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:14:34,857 INFO L208 MainTranslator]: Completed translation [2021-08-25 20:14:34,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34 WrapperNode [2021-08-25 20:14:34,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 20:14:34,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 20:14:34,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 20:14:34,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 20:14:34,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 20:14:34,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 20:14:34,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 20:14:34,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 20:14:34,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 20:14:34,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 20:14:34,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 20:14:34,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 20:14:34,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (1/1) ... [2021-08-25 20:14:34,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:14:34,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:14:34,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 20:14:35,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 20:14:35,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 20:14:35,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 20:14:35,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 20:14:35,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 20:14:35,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 20:14:35,403 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-25 20:14:35,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:14:35 BoogieIcfgContainer [2021-08-25 20:14:35,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 20:14:35,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 20:14:35,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 20:14:35,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 20:14:35,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 08:14:34" (1/3) ... [2021-08-25 20:14:35,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5591fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:14:35, skipping insertion in model container [2021-08-25 20:14:35,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:14:34" (2/3) ... [2021-08-25 20:14:35,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5591fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:14:35, skipping insertion in model container [2021-08-25 20:14:35,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:14:35" (3/3) ... [2021-08-25 20:14:35,411 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2021-08-25 20:14:35,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 20:14:35,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 20:14:35,455 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 20:14:35,461 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 20:14:35,461 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 20:14:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 20:14:35,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:35,476 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:35,477 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1657621241, now seen corresponding path program 1 times [2021-08-25 20:14:35,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:35,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500010459] [2021-08-25 20:14:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:35,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:35,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:35,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500010459] [2021-08-25 20:14:35,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500010459] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:35,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:35,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:35,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988876399] [2021-08-25 20:14:35,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:35,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:35,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:35,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:35,677 INFO L87 Difference]: Start difference. First operand has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:35,733 INFO L93 Difference]: Finished difference Result 77 states and 133 transitions. [2021-08-25 20:14:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 20:14:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:35,741 INFO L225 Difference]: With dead ends: 77 [2021-08-25 20:14:35,742 INFO L226 Difference]: Without dead ends: 63 [2021-08-25 20:14:35,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-25 20:14:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2021-08-25 20:14:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-08-25 20:14:35,773 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-08-25 20:14:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:35,774 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-08-25 20:14:35,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-08-25 20:14:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 20:14:35,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:35,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:35,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 20:14:35,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1399455803, now seen corresponding path program 1 times [2021-08-25 20:14:35,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:35,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314183597] [2021-08-25 20:14:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:35,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:35,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:35,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314183597] [2021-08-25 20:14:35,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314183597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:35,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:35,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:35,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411702891] [2021-08-25 20:14:35,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:35,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:35,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:35,858 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:35,887 INFO L93 Difference]: Finished difference Result 104 states and 189 transitions. [2021-08-25 20:14:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:35,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 20:14:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:35,890 INFO L225 Difference]: With dead ends: 104 [2021-08-25 20:14:35,890 INFO L226 Difference]: Without dead ends: 63 [2021-08-25 20:14:35,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-25 20:14:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-08-25 20:14:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 60 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 110 transitions. [2021-08-25 20:14:35,899 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 110 transitions. Word has length 16 [2021-08-25 20:14:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:35,899 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 110 transitions. [2021-08-25 20:14:35,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 110 transitions. [2021-08-25 20:14:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-25 20:14:35,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:35,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:35,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 20:14:35,900 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:35,907 INFO L82 PathProgramCache]: Analyzing trace with hash 153562753, now seen corresponding path program 1 times [2021-08-25 20:14:35,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:35,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707132536] [2021-08-25 20:14:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:35,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:35,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:35,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707132536] [2021-08-25 20:14:35,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707132536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:35,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:35,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:35,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862226664] [2021-08-25 20:14:35,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:35,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:35,953 INFO L87 Difference]: Start difference. First operand 61 states and 110 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:35,974 INFO L93 Difference]: Finished difference Result 96 states and 168 transitions. [2021-08-25 20:14:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-25 20:14:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:35,975 INFO L225 Difference]: With dead ends: 96 [2021-08-25 20:14:35,975 INFO L226 Difference]: Without dead ends: 66 [2021-08-25 20:14:35,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-25 20:14:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-08-25 20:14:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.7777777777777777) internal successors, (112), 63 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 112 transitions. [2021-08-25 20:14:35,982 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 112 transitions. Word has length 17 [2021-08-25 20:14:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:35,982 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 112 transitions. [2021-08-25 20:14:35,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 112 transitions. [2021-08-25 20:14:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-25 20:14:35,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:35,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:35,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 20:14:35,983 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash -433243261, now seen corresponding path program 1 times [2021-08-25 20:14:35,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:35,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318790055] [2021-08-25 20:14:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:35,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318790055] [2021-08-25 20:14:36,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318790055] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199831152] [2021-08-25 20:14:36,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,019 INFO L87 Difference]: Start difference. First operand 64 states and 112 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,035 INFO L93 Difference]: Finished difference Result 121 states and 213 transitions. [2021-08-25 20:14:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-25 20:14:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,037 INFO L225 Difference]: With dead ends: 121 [2021-08-25 20:14:36,037 INFO L226 Difference]: Without dead ends: 119 [2021-08-25 20:14:36,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-25 20:14:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-08-25 20:14:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.7738095238095237) internal successors, (149), 84 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 149 transitions. [2021-08-25 20:14:36,043 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 149 transitions. Word has length 17 [2021-08-25 20:14:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,043 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 149 transitions. [2021-08-25 20:14:36,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,043 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 149 transitions. [2021-08-25 20:14:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-25 20:14:36,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,044 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 20:14:36,044 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash -175077823, now seen corresponding path program 1 times [2021-08-25 20:14:36,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118031816] [2021-08-25 20:14:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118031816] [2021-08-25 20:14:36,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118031816] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691606876] [2021-08-25 20:14:36,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,076 INFO L87 Difference]: Start difference. First operand 85 states and 149 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,089 INFO L93 Difference]: Finished difference Result 201 states and 355 transitions. [2021-08-25 20:14:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-25 20:14:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,091 INFO L225 Difference]: With dead ends: 201 [2021-08-25 20:14:36,091 INFO L226 Difference]: Without dead ends: 121 [2021-08-25 20:14:36,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-25 20:14:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-08-25 20:14:36,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.7542372881355932) internal successors, (207), 118 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 207 transitions. [2021-08-25 20:14:36,097 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 207 transitions. Word has length 17 [2021-08-25 20:14:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,097 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 207 transitions. [2021-08-25 20:14:36,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 207 transitions. [2021-08-25 20:14:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 20:14:36,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,098 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-25 20:14:36,099 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,099 INFO L82 PathProgramCache]: Analyzing trace with hash -545425190, now seen corresponding path program 1 times [2021-08-25 20:14:36,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341810486] [2021-08-25 20:14:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341810486] [2021-08-25 20:14:36,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341810486] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697214377] [2021-08-25 20:14:36,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,143 INFO L87 Difference]: Start difference. First operand 119 states and 207 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,155 INFO L93 Difference]: Finished difference Result 180 states and 310 transitions. [2021-08-25 20:14:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 20:14:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,156 INFO L225 Difference]: With dead ends: 180 [2021-08-25 20:14:36,157 INFO L226 Difference]: Without dead ends: 123 [2021-08-25 20:14:36,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-25 20:14:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2021-08-25 20:14:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.725) internal successors, (207), 120 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 207 transitions. [2021-08-25 20:14:36,163 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 207 transitions. Word has length 18 [2021-08-25 20:14:36,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,163 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 207 transitions. [2021-08-25 20:14:36,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 207 transitions. [2021-08-25 20:14:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 20:14:36,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 20:14:36,165 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1132231204, now seen corresponding path program 1 times [2021-08-25 20:14:36,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557335576] [2021-08-25 20:14:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557335576] [2021-08-25 20:14:36,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557335576] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997017764] [2021-08-25 20:14:36,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,214 INFO L87 Difference]: Start difference. First operand 121 states and 207 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,236 INFO L93 Difference]: Finished difference Result 345 states and 593 transitions. [2021-08-25 20:14:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 20:14:36,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,238 INFO L225 Difference]: With dead ends: 345 [2021-08-25 20:14:36,238 INFO L226 Difference]: Without dead ends: 231 [2021-08-25 20:14:36,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-25 20:14:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2021-08-25 20:14:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6973684210526316) internal successors, (387), 228 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 387 transitions. [2021-08-25 20:14:36,252 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 387 transitions. Word has length 18 [2021-08-25 20:14:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,252 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 387 transitions. [2021-08-25 20:14:36,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 387 transitions. [2021-08-25 20:14:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 20:14:36,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,253 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-25 20:14:36,254 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1390396642, now seen corresponding path program 1 times [2021-08-25 20:14:36,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130532470] [2021-08-25 20:14:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130532470] [2021-08-25 20:14:36,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130532470] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409207454] [2021-08-25 20:14:36,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,291 INFO L87 Difference]: Start difference. First operand 229 states and 387 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,307 INFO L93 Difference]: Finished difference Result 289 states and 493 transitions. [2021-08-25 20:14:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 20:14:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,314 INFO L225 Difference]: With dead ends: 289 [2021-08-25 20:14:36,314 INFO L226 Difference]: Without dead ends: 287 [2021-08-25 20:14:36,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-25 20:14:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 229. [2021-08-25 20:14:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6798245614035088) internal successors, (383), 228 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 383 transitions. [2021-08-25 20:14:36,327 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 383 transitions. Word has length 18 [2021-08-25 20:14:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,328 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 383 transitions. [2021-08-25 20:14:36,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 383 transitions. [2021-08-25 20:14:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 20:14:36,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-25 20:14:36,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash -739214602, now seen corresponding path program 1 times [2021-08-25 20:14:36,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056268170] [2021-08-25 20:14:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056268170] [2021-08-25 20:14:36,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056268170] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399243353] [2021-08-25 20:14:36,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,369 INFO L87 Difference]: Start difference. First operand 229 states and 383 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,398 INFO L93 Difference]: Finished difference Result 421 states and 713 transitions. [2021-08-25 20:14:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-25 20:14:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,403 INFO L225 Difference]: With dead ends: 421 [2021-08-25 20:14:36,403 INFO L226 Difference]: Without dead ends: 419 [2021-08-25 20:14:36,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-08-25 20:14:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 321. [2021-08-25 20:14:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.646875) internal successors, (527), 320 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 527 transitions. [2021-08-25 20:14:36,426 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 527 transitions. Word has length 19 [2021-08-25 20:14:36,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,426 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 527 transitions. [2021-08-25 20:14:36,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 527 transitions. [2021-08-25 20:14:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 20:14:36,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 20:14:36,432 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash -481049164, now seen corresponding path program 1 times [2021-08-25 20:14:36,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274624424] [2021-08-25 20:14:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274624424] [2021-08-25 20:14:36,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274624424] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825258268] [2021-08-25 20:14:36,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,466 INFO L87 Difference]: Start difference. First operand 321 states and 527 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,490 INFO L93 Difference]: Finished difference Result 757 states and 1249 transitions. [2021-08-25 20:14:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-25 20:14:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,492 INFO L225 Difference]: With dead ends: 757 [2021-08-25 20:14:36,492 INFO L226 Difference]: Without dead ends: 443 [2021-08-25 20:14:36,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-25 20:14:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2021-08-25 20:14:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.625) internal successors, (715), 440 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 715 transitions. [2021-08-25 20:14:36,511 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 715 transitions. Word has length 19 [2021-08-25 20:14:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,511 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 715 transitions. [2021-08-25 20:14:36,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 715 transitions. [2021-08-25 20:14:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:14:36,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-25 20:14:36,516 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1440601487, now seen corresponding path program 1 times [2021-08-25 20:14:36,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543497954] [2021-08-25 20:14:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543497954] [2021-08-25 20:14:36,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543497954] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962716885] [2021-08-25 20:14:36,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,541 INFO L87 Difference]: Start difference. First operand 441 states and 715 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,556 INFO L93 Difference]: Finished difference Result 669 states and 1081 transitions. [2021-08-25 20:14:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 20:14:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,558 INFO L225 Difference]: With dead ends: 669 [2021-08-25 20:14:36,559 INFO L226 Difference]: Without dead ends: 455 [2021-08-25 20:14:36,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-08-25 20:14:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 453. [2021-08-25 20:14:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5995575221238938) internal successors, (723), 452 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 723 transitions. [2021-08-25 20:14:36,569 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 723 transitions. Word has length 20 [2021-08-25 20:14:36,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,569 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 723 transitions. [2021-08-25 20:14:36,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 723 transitions. [2021-08-25 20:14:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:14:36,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,570 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-25 20:14:36,570 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2027407501, now seen corresponding path program 1 times [2021-08-25 20:14:36,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514240469] [2021-08-25 20:14:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514240469] [2021-08-25 20:14:36,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514240469] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818381296] [2021-08-25 20:14:36,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,593 INFO L87 Difference]: Start difference. First operand 453 states and 723 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,608 INFO L93 Difference]: Finished difference Result 809 states and 1309 transitions. [2021-08-25 20:14:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 20:14:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,611 INFO L225 Difference]: With dead ends: 809 [2021-08-25 20:14:36,611 INFO L226 Difference]: Without dead ends: 807 [2021-08-25 20:14:36,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-08-25 20:14:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 645. [2021-08-25 20:14:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.5574534161490683) internal successors, (1003), 644 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1003 transitions. [2021-08-25 20:14:36,622 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1003 transitions. Word has length 20 [2021-08-25 20:14:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,622 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1003 transitions. [2021-08-25 20:14:36,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1003 transitions. [2021-08-25 20:14:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:14:36,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-25 20:14:36,624 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1769242063, now seen corresponding path program 1 times [2021-08-25 20:14:36,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982078516] [2021-08-25 20:14:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982078516] [2021-08-25 20:14:36,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982078516] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413425559] [2021-08-25 20:14:36,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,661 INFO L87 Difference]: Start difference. First operand 645 states and 1003 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,679 INFO L93 Difference]: Finished difference Result 1497 states and 2333 transitions. [2021-08-25 20:14:36,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 20:14:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,682 INFO L225 Difference]: With dead ends: 1497 [2021-08-25 20:14:36,683 INFO L226 Difference]: Without dead ends: 871 [2021-08-25 20:14:36,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-08-25 20:14:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 869. [2021-08-25 20:14:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.5334101382488479) internal successors, (1331), 868 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1331 transitions. [2021-08-25 20:14:36,699 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1331 transitions. Word has length 20 [2021-08-25 20:14:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,700 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1331 transitions. [2021-08-25 20:14:36,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1331 transitions. [2021-08-25 20:14:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 20:14:36,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-25 20:14:36,701 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1575091945, now seen corresponding path program 1 times [2021-08-25 20:14:36,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834355553] [2021-08-25 20:14:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834355553] [2021-08-25 20:14:36,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834355553] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093284399] [2021-08-25 20:14:36,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,749 INFO L87 Difference]: Start difference. First operand 869 states and 1331 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,770 INFO L93 Difference]: Finished difference Result 1305 states and 1989 transitions. [2021-08-25 20:14:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-25 20:14:36,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,773 INFO L225 Difference]: With dead ends: 1305 [2021-08-25 20:14:36,774 INFO L226 Difference]: Without dead ends: 887 [2021-08-25 20:14:36,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-08-25 20:14:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 885. [2021-08-25 20:14:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.505656108597285) internal successors, (1331), 884 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1331 transitions. [2021-08-25 20:14:36,794 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1331 transitions. Word has length 21 [2021-08-25 20:14:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,794 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1331 transitions. [2021-08-25 20:14:36,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1331 transitions. [2021-08-25 20:14:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 20:14:36,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-25 20:14:36,796 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,796 INFO L82 PathProgramCache]: Analyzing trace with hash 988285931, now seen corresponding path program 1 times [2021-08-25 20:14:36,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608078677] [2021-08-25 20:14:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608078677] [2021-08-25 20:14:36,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608078677] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969367] [2021-08-25 20:14:36,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,847 INFO L87 Difference]: Start difference. First operand 885 states and 1331 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,873 INFO L93 Difference]: Finished difference Result 1545 states and 2357 transitions. [2021-08-25 20:14:36,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-25 20:14:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,880 INFO L225 Difference]: With dead ends: 1545 [2021-08-25 20:14:36,880 INFO L226 Difference]: Without dead ends: 1543 [2021-08-25 20:14:36,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-08-25 20:14:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1285. [2021-08-25 20:14:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 1.4602803738317758) internal successors, (1875), 1284 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1875 transitions. [2021-08-25 20:14:36,906 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1875 transitions. Word has length 21 [2021-08-25 20:14:36,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:36,907 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 1875 transitions. [2021-08-25 20:14:36,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1875 transitions. [2021-08-25 20:14:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 20:14:36,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:36,908 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:36,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-25 20:14:36,909 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1246451369, now seen corresponding path program 1 times [2021-08-25 20:14:36,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:36,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778163864] [2021-08-25 20:14:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:36,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:36,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:36,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778163864] [2021-08-25 20:14:36,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778163864] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:36,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:36,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:36,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020893779] [2021-08-25 20:14:36,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:36,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:36,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:36,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,942 INFO L87 Difference]: Start difference. First operand 1285 states and 1875 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:36,968 INFO L93 Difference]: Finished difference Result 2953 states and 4309 transitions. [2021-08-25 20:14:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-25 20:14:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:36,972 INFO L225 Difference]: With dead ends: 2953 [2021-08-25 20:14:36,972 INFO L226 Difference]: Without dead ends: 1703 [2021-08-25 20:14:36,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:36,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-08-25 20:14:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1701. [2021-08-25 20:14:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 1.4323529411764706) internal successors, (2435), 1700 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 2435 transitions. [2021-08-25 20:14:37,022 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 2435 transitions. Word has length 21 [2021-08-25 20:14:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:37,023 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 2435 transitions. [2021-08-25 20:14:37,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 2435 transitions. [2021-08-25 20:14:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 20:14:37,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:37,025 INFO L512 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] [2021-08-25 20:14:37,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-25 20:14:37,025 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash 572308166, now seen corresponding path program 1 times [2021-08-25 20:14:37,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:37,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698452666] [2021-08-25 20:14:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:37,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:37,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:37,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698452666] [2021-08-25 20:14:37,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698452666] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:37,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:37,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:37,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631838450] [2021-08-25 20:14:37,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:37,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:37,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,050 INFO L87 Difference]: Start difference. First operand 1701 states and 2435 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:37,074 INFO L93 Difference]: Finished difference Result 2553 states and 3637 transitions. [2021-08-25 20:14:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-25 20:14:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:37,079 INFO L225 Difference]: With dead ends: 2553 [2021-08-25 20:14:37,080 INFO L226 Difference]: Without dead ends: 1735 [2021-08-25 20:14:37,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-08-25 20:14:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1733. [2021-08-25 20:14:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 1.4058891454965359) internal successors, (2435), 1732 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2435 transitions. [2021-08-25 20:14:37,138 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2435 transitions. Word has length 22 [2021-08-25 20:14:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:37,138 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 2435 transitions. [2021-08-25 20:14:37,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2435 transitions. [2021-08-25 20:14:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 20:14:37,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:37,140 INFO L512 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] [2021-08-25 20:14:37,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-25 20:14:37,140 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash -14497848, now seen corresponding path program 1 times [2021-08-25 20:14:37,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:37,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769913530] [2021-08-25 20:14:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:37,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:37,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:37,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769913530] [2021-08-25 20:14:37,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769913530] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:37,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:37,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:37,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539035951] [2021-08-25 20:14:37,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:37,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:37,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:37,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,171 INFO L87 Difference]: Start difference. First operand 1733 states and 2435 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:37,208 INFO L93 Difference]: Finished difference Result 2953 states and 4197 transitions. [2021-08-25 20:14:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-25 20:14:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:37,217 INFO L225 Difference]: With dead ends: 2953 [2021-08-25 20:14:37,217 INFO L226 Difference]: Without dead ends: 2951 [2021-08-25 20:14:37,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-08-25 20:14:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2565. [2021-08-25 20:14:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2564 states have (on average 1.361544461778471) internal successors, (3491), 2564 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 3491 transitions. [2021-08-25 20:14:37,285 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 3491 transitions. Word has length 22 [2021-08-25 20:14:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:37,285 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 3491 transitions. [2021-08-25 20:14:37,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 3491 transitions. [2021-08-25 20:14:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 20:14:37,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:37,288 INFO L512 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] [2021-08-25 20:14:37,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-25 20:14:37,289 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash 243667590, now seen corresponding path program 1 times [2021-08-25 20:14:37,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:37,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540017624] [2021-08-25 20:14:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:37,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:37,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:37,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540017624] [2021-08-25 20:14:37,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540017624] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:37,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:37,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:37,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639053671] [2021-08-25 20:14:37,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:37,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:37,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,327 INFO L87 Difference]: Start difference. First operand 2565 states and 3491 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:37,372 INFO L93 Difference]: Finished difference Result 5833 states and 7909 transitions. [2021-08-25 20:14:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-25 20:14:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:37,382 INFO L225 Difference]: With dead ends: 5833 [2021-08-25 20:14:37,382 INFO L226 Difference]: Without dead ends: 3335 [2021-08-25 20:14:37,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-08-25 20:14:37,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3333. [2021-08-25 20:14:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.3262304921968788) internal successors, (4419), 3332 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 4419 transitions. [2021-08-25 20:14:37,460 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 4419 transitions. Word has length 22 [2021-08-25 20:14:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:37,460 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 4419 transitions. [2021-08-25 20:14:37,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 4419 transitions. [2021-08-25 20:14:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:14:37,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:37,464 INFO L512 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] [2021-08-25 20:14:37,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-25 20:14:37,464 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash -449217570, now seen corresponding path program 1 times [2021-08-25 20:14:37,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:37,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166007420] [2021-08-25 20:14:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:37,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:37,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:37,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166007420] [2021-08-25 20:14:37,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166007420] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:37,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:37,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:37,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120023394] [2021-08-25 20:14:37,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:37,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,494 INFO L87 Difference]: Start difference. First operand 3333 states and 4419 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:37,533 INFO L93 Difference]: Finished difference Result 5001 states and 6597 transitions. [2021-08-25 20:14:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:37,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-25 20:14:37,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:37,542 INFO L225 Difference]: With dead ends: 5001 [2021-08-25 20:14:37,543 INFO L226 Difference]: Without dead ends: 3399 [2021-08-25 20:14:37,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2021-08-25 20:14:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3397. [2021-08-25 20:14:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 1.3012367491166077) internal successors, (4419), 3396 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 4419 transitions. [2021-08-25 20:14:37,616 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 4419 transitions. Word has length 23 [2021-08-25 20:14:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:37,616 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 4419 transitions. [2021-08-25 20:14:37,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 4419 transitions. [2021-08-25 20:14:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:14:37,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:37,619 INFO L512 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] [2021-08-25 20:14:37,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-25 20:14:37,620 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:37,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:37,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1036023584, now seen corresponding path program 1 times [2021-08-25 20:14:37,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:37,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405461096] [2021-08-25 20:14:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:37,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:37,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:37,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405461096] [2021-08-25 20:14:37,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405461096] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:37,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:37,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:37,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506662332] [2021-08-25 20:14:37,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:37,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,640 INFO L87 Difference]: Start difference. First operand 3397 states and 4419 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:37,703 INFO L93 Difference]: Finished difference Result 5641 states and 7365 transitions. [2021-08-25 20:14:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-25 20:14:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:37,716 INFO L225 Difference]: With dead ends: 5641 [2021-08-25 20:14:37,716 INFO L226 Difference]: Without dead ends: 5639 [2021-08-25 20:14:37,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-08-25 20:14:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 5125. [2021-08-25 20:14:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 1.2620999219359874) internal successors, (6467), 5124 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 6467 transitions. [2021-08-25 20:14:37,820 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 6467 transitions. Word has length 23 [2021-08-25 20:14:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:37,820 INFO L470 AbstractCegarLoop]: Abstraction has 5125 states and 6467 transitions. [2021-08-25 20:14:37,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 6467 transitions. [2021-08-25 20:14:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:14:37,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:37,826 INFO L512 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] [2021-08-25 20:14:37,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-25 20:14:37,827 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:37,827 INFO L82 PathProgramCache]: Analyzing trace with hash -777858146, now seen corresponding path program 1 times [2021-08-25 20:14:37,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:37,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935128481] [2021-08-25 20:14:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:37,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:37,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:37,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935128481] [2021-08-25 20:14:37,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935128481] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:37,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:37,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:37,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568853030] [2021-08-25 20:14:37,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:37,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,852 INFO L87 Difference]: Start difference. First operand 5125 states and 6467 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:37,944 INFO L93 Difference]: Finished difference Result 11529 states and 14405 transitions. [2021-08-25 20:14:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:37,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-25 20:14:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:37,956 INFO L225 Difference]: With dead ends: 11529 [2021-08-25 20:14:37,957 INFO L226 Difference]: Without dead ends: 6535 [2021-08-25 20:14:37,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2021-08-25 20:14:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6533. [2021-08-25 20:14:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6532 states have (on average 1.2154011022657685) internal successors, (7939), 6532 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 7939 transitions. [2021-08-25 20:14:38,122 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 7939 transitions. Word has length 23 [2021-08-25 20:14:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:38,122 INFO L470 AbstractCegarLoop]: Abstraction has 6533 states and 7939 transitions. [2021-08-25 20:14:38,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 7939 transitions. [2021-08-25 20:14:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:14:38,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:38,130 INFO L512 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] [2021-08-25 20:14:38,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-25 20:14:38,130 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:38,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2051743973, now seen corresponding path program 1 times [2021-08-25 20:14:38,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:38,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859573985] [2021-08-25 20:14:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:38,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:38,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:38,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859573985] [2021-08-25 20:14:38,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859573985] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:38,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:38,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:38,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013960134] [2021-08-25 20:14:38,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:38,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:38,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:38,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:38,154 INFO L87 Difference]: Start difference. First operand 6533 states and 7939 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:38,219 INFO L93 Difference]: Finished difference Result 9801 states and 11845 transitions. [2021-08-25 20:14:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:38,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 20:14:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:38,232 INFO L225 Difference]: With dead ends: 9801 [2021-08-25 20:14:38,232 INFO L226 Difference]: Without dead ends: 6663 [2021-08-25 20:14:38,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6663 states. [2021-08-25 20:14:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6663 to 6661. [2021-08-25 20:14:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 1.1920420420420421) internal successors, (7939), 6660 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 7939 transitions. [2021-08-25 20:14:38,386 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 7939 transitions. Word has length 24 [2021-08-25 20:14:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:38,386 INFO L470 AbstractCegarLoop]: Abstraction has 6661 states and 7939 transitions. [2021-08-25 20:14:38,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 7939 transitions. [2021-08-25 20:14:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:14:38,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:38,395 INFO L512 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] [2021-08-25 20:14:38,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-25 20:14:38,395 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:38,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1656417309, now seen corresponding path program 1 times [2021-08-25 20:14:38,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:38,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725947632] [2021-08-25 20:14:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:38,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:38,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:38,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725947632] [2021-08-25 20:14:38,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725947632] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:38,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:38,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:38,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872178102] [2021-08-25 20:14:38,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:38,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:38,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:38,427 INFO L87 Difference]: Start difference. First operand 6661 states and 7939 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:38,560 INFO L93 Difference]: Finished difference Result 10759 states and 12676 transitions. [2021-08-25 20:14:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 20:14:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:38,575 INFO L225 Difference]: With dead ends: 10759 [2021-08-25 20:14:38,576 INFO L226 Difference]: Without dead ends: 10757 [2021-08-25 20:14:38,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10757 states. [2021-08-25 20:14:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10757 to 10245. [2021-08-25 20:14:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 10244 states have (on average 1.1623389301054277) internal successors, (11907), 10244 states have internal predecessors, (11907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 11907 transitions. [2021-08-25 20:14:38,786 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 11907 transitions. Word has length 24 [2021-08-25 20:14:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:38,787 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 11907 transitions. [2021-08-25 20:14:38,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 11907 transitions. [2021-08-25 20:14:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:14:38,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:38,799 INFO L512 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] [2021-08-25 20:14:38,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-25 20:14:38,800 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:38,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1914582747, now seen corresponding path program 1 times [2021-08-25 20:14:38,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:38,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510234878] [2021-08-25 20:14:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:38,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:38,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:38,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510234878] [2021-08-25 20:14:38,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510234878] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:38,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:38,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:38,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890637428] [2021-08-25 20:14:38,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:38,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:38,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:38,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:38,824 INFO L87 Difference]: Start difference. First operand 10245 states and 11907 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:38,990 INFO L93 Difference]: Finished difference Result 22789 states and 25987 transitions. [2021-08-25 20:14:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:38,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 20:14:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:38,991 INFO L225 Difference]: With dead ends: 22789 [2021-08-25 20:14:38,992 INFO L226 Difference]: Without dead ends: 0 [2021-08-25 20:14:39,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-25 20:14:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-25 20:14:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-25 20:14:39,009 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-08-25 20:14:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:39,009 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-25 20:14:39,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:14:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-25 20:14:39,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-25 20:14:39,012 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 20:14:39,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-25 20:14:39,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-25 20:14:39,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:39,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:39,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:39,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:39,033 INFO L857 garLoopResultBuilder]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,033 INFO L857 garLoopResultBuilder]: For program point L102(line 102) no Hoare annotation was computed. [2021-08-25 20:14:39,033 INFO L857 garLoopResultBuilder]: For program point L127(line 127) no Hoare annotation was computed. [2021-08-25 20:14:39,033 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-25 20:14:39,033 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-25 20:14:39,033 INFO L857 garLoopResultBuilder]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,033 INFO L857 garLoopResultBuilder]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,034 INFO L857 garLoopResultBuilder]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,034 INFO L857 garLoopResultBuilder]: For program point L87-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,034 INFO L857 garLoopResultBuilder]: For program point L112(line 112) no Hoare annotation was computed. [2021-08-25 20:14:39,034 INFO L857 garLoopResultBuilder]: For program point L79-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,034 INFO L857 garLoopResultBuilder]: For program point L137(line 137) no Hoare annotation was computed. [2021-08-25 20:14:39,035 INFO L857 garLoopResultBuilder]: For program point L71-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,035 INFO L857 garLoopResultBuilder]: For program point L63(lines 63 65) no Hoare annotation was computed. [2021-08-25 20:14:39,035 INFO L857 garLoopResultBuilder]: For program point L63-2(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,035 INFO L857 garLoopResultBuilder]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,035 INFO L857 garLoopResultBuilder]: For program point L122(line 122) no Hoare annotation was computed. [2021-08-25 20:14:39,035 INFO L860 garLoopResultBuilder]: At program point L147(lines 7 151) the Hoare annotation is: true [2021-08-25 20:14:39,035 INFO L857 garLoopResultBuilder]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,035 INFO L857 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-08-25 20:14:39,036 INFO L857 garLoopResultBuilder]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,036 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-25 20:14:39,036 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 149) no Hoare annotation was computed. [2021-08-25 20:14:39,036 INFO L857 garLoopResultBuilder]: For program point L107(line 107) no Hoare annotation was computed. [2021-08-25 20:14:39,036 INFO L857 garLoopResultBuilder]: For program point L132(line 132) no Hoare annotation was computed. [2021-08-25 20:14:39,036 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-25 20:14:39,036 INFO L857 garLoopResultBuilder]: For program point L91-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,036 INFO L857 garLoopResultBuilder]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,037 INFO L857 garLoopResultBuilder]: For program point L83-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,037 INFO L860 garLoopResultBuilder]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2021-08-25 20:14:39,037 INFO L857 garLoopResultBuilder]: For program point L75-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,037 INFO L857 garLoopResultBuilder]: For program point L67-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,037 INFO L860 garLoopResultBuilder]: At program point L150(lines 6 151) the Hoare annotation is: true [2021-08-25 20:14:39,037 INFO L857 garLoopResultBuilder]: For program point L117(line 117) no Hoare annotation was computed. [2021-08-25 20:14:39,037 INFO L857 garLoopResultBuilder]: For program point L142(line 142) no Hoare annotation was computed. [2021-08-25 20:14:39,037 INFO L853 garLoopResultBuilder]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2021-08-25 20:14:39,037 INFO L857 garLoopResultBuilder]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2021-08-25 20:14:39,040 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 20:14:39,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 08:14:39 BoogieIcfgContainer [2021-08-25 20:14:39,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 20:14:39,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 20:14:39,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 20:14:39,049 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 20:14:39,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:14:35" (3/4) ... [2021-08-25 20:14:39,051 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-25 20:14:39,059 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-25 20:14:39,059 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-25 20:14:39,059 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 20:14:39,060 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 20:14:39,092 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 20:14:39,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 20:14:39,094 INFO L168 Benchmark]: Toolchain (without parser) took 4460.15 ms. Allocated memory was 54.5 MB in the beginning and 457.2 MB in the end (delta: 402.7 MB). Free memory was 33.1 MB in the beginning and 230.0 MB in the end (delta: -196.9 MB). Peak memory consumption was 204.0 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:39,094 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 36.3 MB in the beginning and 36.3 MB in the end (delta: 26.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:14:39,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.41 ms. Allocated memory is still 54.5 MB. Free memory was 32.9 MB in the beginning and 37.2 MB in the end (delta: -4.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:39,094 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.30 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 35.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:14:39,095 INFO L168 Benchmark]: Boogie Preprocessor took 32.99 ms. Allocated memory is still 54.5 MB. Free memory was 35.5 MB in the beginning and 34.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:39,095 INFO L168 Benchmark]: RCFGBuilder took 474.12 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 34.2 MB in the beginning and 40.8 MB in the end (delta: -6.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:39,095 INFO L168 Benchmark]: TraceAbstraction took 3641.61 ms. Allocated memory was 67.1 MB in the beginning and 457.2 MB in the end (delta: 390.1 MB). Free memory was 40.3 MB in the beginning and 233.2 MB in the end (delta: -192.9 MB). Peak memory consumption was 197.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:39,095 INFO L168 Benchmark]: Witness Printer took 43.97 ms. Allocated memory is still 457.2 MB. Free memory was 233.2 MB in the beginning and 230.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:39,096 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 36.3 MB in the beginning and 36.3 MB in the end (delta: 26.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 223.41 ms. Allocated memory is still 54.5 MB. Free memory was 32.9 MB in the beginning and 37.2 MB in the end (delta: -4.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.30 ms. Allocated memory is still 54.5 MB. Free memory was 37.2 MB in the beginning and 35.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.99 ms. Allocated memory is still 54.5 MB. Free memory was 35.5 MB in the beginning and 34.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 474.12 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 34.2 MB in the beginning and 40.8 MB in the end (delta: -6.6 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3641.61 ms. Allocated memory was 67.1 MB in the beginning and 457.2 MB in the end (delta: 390.1 MB). Free memory was 40.3 MB in the beginning and 233.2 MB in the end (delta: -192.9 MB). Peak memory consumption was 197.1 MB. Max. memory is 16.1 GB. * Witness Printer took 43.97 ms. Allocated memory is still 457.2 MB. Free memory was 233.2 MB in the beginning and 230.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 149]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3586.8ms, OverallIterations: 25, TraceHistogramMax: 1, EmptinessCheckTime: 63.2ms, AutomataDifference: 1258.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 20.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1866 SDtfs, 922 SDslu, 1232 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 217.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10245occurred in iteration=24, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1124.8ms AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 521 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 6.6ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 4.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 43.4ms SsaConstructionTime, 199.8ms SatisfiabilityAnalysisTime, 588.7ms InterpolantComputationTime, 505 NumberOfCodeBlocks, 505 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 480 ConstructedInterpolants, 0 QuantifiedInterpolants, 1011 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-08-25 20:14:39,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...