./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/diamond_1-1.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/loop-acceleration/diamond_1-1.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 21a75c3552131427f947c5c498607b918de6f0dd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:20:14,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:20:14,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:20:15,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:20:15,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:20:15,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:20:15,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:20:15,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:20:15,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:20:15,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:20:15,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:20:15,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:20:15,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:20:15,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:20:15,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:20:15,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:20:15,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:20:15,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:20:15,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:20:15,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:20:15,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:20:15,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:20:15,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:20:15,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:20:15,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:20:15,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:20:15,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:20:15,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:20:15,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:20:15,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:20:15,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:20:15,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:20:15,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:20:15,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:20:15,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:20:15,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:20:15,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:20:15,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:20:15,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:20:15,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:20:15,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:20:15,070 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:20:15,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:20:15,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:20:15,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:20:15,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:20:15,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:20:15,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:20:15,098 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:20:15,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:20:15,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:20:15,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:20:15,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:20:15,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:20:15,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:20:15,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:20:15,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:20:15,100 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:20:15,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:20:15,100 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:20:15,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:20:15,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:20:15,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:20:15,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:20:15,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:20:15,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:20:15,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:20:15,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:20:15,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:20:15,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:20:15,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:20:15,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:20:15,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21a75c3552131427f947c5c498607b918de6f0dd [2021-08-26 03:20:15,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:20:15,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:20:15,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:20:15,433 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:20:15,434 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:20:15,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-1.c [2021-08-26 03:20:15,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154b74ff2/18c0d6bc32f948908901b5c47f12fe45/FLAG4fa161357 [2021-08-26 03:20:15,859 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:20:15,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-1.c [2021-08-26 03:20:15,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154b74ff2/18c0d6bc32f948908901b5c47f12fe45/FLAG4fa161357 [2021-08-26 03:20:15,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/154b74ff2/18c0d6bc32f948908901b5c47f12fe45 [2021-08-26 03:20:15,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:20:15,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:20:15,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:20:15,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:20:15,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:20:15,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:20:15" (1/1) ... [2021-08-26 03:20:15,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fa9f18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:15, skipping insertion in model container [2021-08-26 03:20:15,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:20:15" (1/1) ... [2021-08-26 03:20:15,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:20:15,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:20:16,006 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/loop-acceleration/diamond_1-1.c[373,386] [2021-08-26 03:20:16,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:20:16,025 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:20:16,036 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/loop-acceleration/diamond_1-1.c[373,386] [2021-08-26 03:20:16,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:20:16,063 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:20:16,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16 WrapperNode [2021-08-26 03:20:16,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:20:16,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:20:16,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:20:16,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:20:16,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:20:16,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:20:16,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:20:16,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:20:16,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:20:16,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:20:16,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:20:16,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:20:16,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (1/1) ... [2021-08-26 03:20:16,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:20:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:16,179 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) [2021-08-26 03:20:16,202 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 [2021-08-26 03:20:16,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:20:16,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:20:16,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:20:16,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:20:16,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:20:16,389 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:20:16,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:20:16 BoogieIcfgContainer [2021-08-26 03:20:16,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:20:16,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:20:16,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:20:16,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:20:16,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:20:15" (1/3) ... [2021-08-26 03:20:16,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294b97eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:20:16, skipping insertion in model container [2021-08-26 03:20:16,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:16" (2/3) ... [2021-08-26 03:20:16,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294b97eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:20:16, skipping insertion in model container [2021-08-26 03:20:16,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:20:16" (3/3) ... [2021-08-26 03:20:16,398 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2021-08-26 03:20:16,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:20:16,404 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:20:16,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:20:16,438 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 [2021-08-26 03:20:16,438 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:20:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-08-26 03:20:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:20:16,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:16,450 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:20:16,451 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-08-26 03:20:16,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:16,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914953022] [2021-08-26 03:20:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:16,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:16,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:16,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914953022] [2021-08-26 03:20:16,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914953022] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:20:16,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:20:16,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 03:20:16,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677794371] [2021-08-26 03:20:16,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 03:20:16,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 03:20:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:20:16,573 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 03:20:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:16,580 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-08-26 03:20:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 03:20:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2021-08-26 03:20:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:16,585 INFO L225 Difference]: With dead ends: 18 [2021-08-26 03:20:16,586 INFO L226 Difference]: Without dead ends: 8 [2021-08-26 03:20:16,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:20:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-08-26 03:20:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-08-26 03:20:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2021-08-26 03:20:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-08-26 03:20:16,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-08-26 03:20:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:16,618 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-08-26 03:20:16,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-08-26 03:20:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-08-26 03:20:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:20:16,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:16,618 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:20:16,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:20:16,619 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-08-26 03:20:16,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:16,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177282046] [2021-08-26 03:20:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:16,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:16,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:16,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177282046] [2021-08-26 03:20:16,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177282046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:20:16,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:20:16,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:20:16,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327447211] [2021-08-26 03:20:16,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:20:16,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:20:16,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:20:16,725 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-08-26 03:20:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:16,748 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-08-26 03:20:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:20:16,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-08-26 03:20:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:16,750 INFO L225 Difference]: With dead ends: 14 [2021-08-26 03:20:16,750 INFO L226 Difference]: Without dead ends: 10 [2021-08-26 03:20:16,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:20:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-26 03:20:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-08-26 03:20:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-08-26 03:20:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-26 03:20:16,755 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-08-26 03:20:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:16,756 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-26 03:20:16,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-08-26 03:20:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-08-26 03:20:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 03:20:16,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:16,757 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:16,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:20:16,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:16,760 INFO L82 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2021-08-26 03:20:16,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:16,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192570378] [2021-08-26 03:20:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:16,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:16,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:16,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192570378] [2021-08-26 03:20:16,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192570378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:16,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913254828] [2021-08-26 03:20:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:16,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:16,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:16,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:16,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:20:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:20:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:17,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913254828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:17,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:17,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-08-26 03:20:17,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350220388] [2021-08-26 03:20:17,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:20:17,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:17,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:20:17,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:20:17,125 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-26 03:20:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:17,148 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-08-26 03:20:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:20:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 8 [2021-08-26 03:20:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:17,149 INFO L225 Difference]: With dead ends: 18 [2021-08-26 03:20:17,149 INFO L226 Difference]: Without dead ends: 12 [2021-08-26 03:20:17,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:20:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-26 03:20:17,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-26 03:20:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-08-26 03:20:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-08-26 03:20:17,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 8 [2021-08-26 03:20:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:17,151 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-26 03:20:17,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-26 03:20:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-08-26 03:20:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 03:20:17,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:17,152 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:17,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:17,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:17,360 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:17,360 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-08-26 03:20:17,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:17,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601103627] [2021-08-26 03:20:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:17,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:17,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:17,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601103627] [2021-08-26 03:20:17,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601103627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:17,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275751009] [2021-08-26 03:20:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:17,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:17,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:17,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:17,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:20:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:17,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:20:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:17,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275751009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:17,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:17,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-08-26 03:20:17,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161515251] [2021-08-26 03:20:17,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:20:17,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:20:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:20:17,608 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-26 03:20:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:17,650 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-08-26 03:20:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:20:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 8 [2021-08-26 03:20:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:17,655 INFO L225 Difference]: With dead ends: 20 [2021-08-26 03:20:17,655 INFO L226 Difference]: Without dead ends: 14 [2021-08-26 03:20:17,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:20:17,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-26 03:20:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-26 03:20:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-08-26 03:20:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-26 03:20:17,667 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-08-26 03:20:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:17,667 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-26 03:20:17,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-26 03:20:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-26 03:20:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 03:20:17,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:17,667 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:17,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:17,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-26 03:20:17,875 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1775672709, now seen corresponding path program 2 times [2021-08-26 03:20:17,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:17,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832506793] [2021-08-26 03:20:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:17,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:17,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:17,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832506793] [2021-08-26 03:20:17,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832506793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:17,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937330741] [2021-08-26 03:20:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:20:17,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:17,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:17,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:17,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:20:18,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:20:18,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:20:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:18,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937330741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:18,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:18,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 03:20:18,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137172125] [2021-08-26 03:20:18,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:20:18,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:20:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:20:18,105 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-26 03:20:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:18,126 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-08-26 03:20:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:20:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 10 [2021-08-26 03:20:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:18,127 INFO L225 Difference]: With dead ends: 20 [2021-08-26 03:20:18,127 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 03:20:18,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:20:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 03:20:18,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-08-26 03:20:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-08-26 03:20:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-08-26 03:20:18,130 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2021-08-26 03:20:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:18,130 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-08-26 03:20:18,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-26 03:20:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-08-26 03:20:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 03:20:18,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:18,131 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:18,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:18,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:18,353 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-08-26 03:20:18,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:18,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525290433] [2021-08-26 03:20:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:18,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:18,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:18,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525290433] [2021-08-26 03:20:18,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525290433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:18,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146478282] [2021-08-26 03:20:18,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:20:18,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:18,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:18,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:18,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:20:18,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:20:18,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:18,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:20:18,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:18,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146478282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:18,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:18,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 03:20:18,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625706654] [2021-08-26 03:20:18,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:20:18,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:18,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:20:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:20:18,580 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-26 03:20:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:18,606 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-08-26 03:20:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:20:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 10 [2021-08-26 03:20:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:18,607 INFO L225 Difference]: With dead ends: 21 [2021-08-26 03:20:18,607 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 03:20:18,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:20:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 03:20:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-08-26 03:20:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-08-26 03:20:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-08-26 03:20:18,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2021-08-26 03:20:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:18,610 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-08-26 03:20:18,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-26 03:20:18,610 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-08-26 03:20:18,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 03:20:18,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:18,611 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:18,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:18,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:18,825 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1267267040, now seen corresponding path program 3 times [2021-08-26 03:20:18,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:18,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942698783] [2021-08-26 03:20:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:18,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:18,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942698783] [2021-08-26 03:20:18,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942698783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251013348] [2021-08-26 03:20:18,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:20:18,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:18,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:18,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:18,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:20:18,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 03:20:18,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:18,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:20:18,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 03:20:19,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251013348] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:20:19,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:20:19,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-08-26 03:20:19,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727264725] [2021-08-26 03:20:19,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:20:19,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:20:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:20:19,220 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-08-26 03:20:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:19,283 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-08-26 03:20:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:20:19,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 12 [2021-08-26 03:20:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:19,284 INFO L225 Difference]: With dead ends: 26 [2021-08-26 03:20:19,284 INFO L226 Difference]: Without dead ends: 13 [2021-08-26 03:20:19,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:20:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-26 03:20:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-26 03:20:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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) [2021-08-26 03:20:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-08-26 03:20:19,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2021-08-26 03:20:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:19,286 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-08-26 03:20:19,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-08-26 03:20:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-08-26 03:20:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 03:20:19,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:19,286 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:19,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:19,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:19,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:19,488 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2021-08-26 03:20:19,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:19,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056669672] [2021-08-26 03:20:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:19,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:19,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:19,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056669672] [2021-08-26 03:20:19,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056669672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:19,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236425402] [2021-08-26 03:20:19,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:20:19,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:19,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:19,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:19,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:20:19,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 03:20:19,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 03:20:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:19,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236425402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:19,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:19,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-26 03:20:19,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254943574] [2021-08-26 03:20:19,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 03:20:19,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 03:20:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:20:19,795 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-08-26 03:20:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:19,825 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-08-26 03:20:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:20:19,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 12 [2021-08-26 03:20:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:19,828 INFO L225 Difference]: With dead ends: 20 [2021-08-26 03:20:19,829 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 03:20:19,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:20:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 03:20:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-08-26 03:20:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-08-26 03:20:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-08-26 03:20:19,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-08-26 03:20:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:19,836 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-08-26 03:20:19,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-08-26 03:20:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-08-26 03:20:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 03:20:19,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:19,837 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:19,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-26 03:20:20,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:20,054 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:20,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1178700931, now seen corresponding path program 4 times [2021-08-26 03:20:20,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:20,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564423278] [2021-08-26 03:20:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:20,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:20,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:20,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564423278] [2021-08-26 03:20:20,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564423278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:20,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375881191] [2021-08-26 03:20:20,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:20:20,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:20,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:20,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:20,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 03:20:20,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:20:20,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 03:20:20,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:20,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375881191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:20,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:20,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-26 03:20:20,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296643790] [2021-08-26 03:20:20,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 03:20:20,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 03:20:20,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:20:20,357 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-08-26 03:20:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:20,419 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-08-26 03:20:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:20:20,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 14 [2021-08-26 03:20:20,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:20,420 INFO L225 Difference]: With dead ends: 22 [2021-08-26 03:20:20,420 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 03:20:20,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:20:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 03:20:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-08-26 03:20:20,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 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) [2021-08-26 03:20:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-08-26 03:20:20,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-08-26 03:20:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:20,423 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-08-26 03:20:20,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-08-26 03:20:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-08-26 03:20:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 03:20:20,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:20,424 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:20,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-26 03:20:20,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:20,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:20,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:20,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1190114208, now seen corresponding path program 5 times [2021-08-26 03:20:20,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:20,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681356509] [2021-08-26 03:20:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:20,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:20,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:20,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681356509] [2021-08-26 03:20:20,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681356509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:20,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765910254] [2021-08-26 03:20:20,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:20:20,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:20,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:20,733 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:20,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 03:20:20,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 03:20:20,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 03:20:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:20,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765910254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:20,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:20,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-08-26 03:20:20,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233567164] [2021-08-26 03:20:20,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 03:20:20,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 03:20:20,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:20:20,985 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-08-26 03:20:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:21,052 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-08-26 03:20:21,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 03:20:21,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 16 [2021-08-26 03:20:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:21,053 INFO L225 Difference]: With dead ends: 24 [2021-08-26 03:20:21,053 INFO L226 Difference]: Without dead ends: 20 [2021-08-26 03:20:21,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:20:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-26 03:20:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-08-26 03:20:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 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) [2021-08-26 03:20:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-08-26 03:20:21,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-08-26 03:20:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:21,055 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-08-26 03:20:21,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-08-26 03:20:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-08-26 03:20:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 03:20:21,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:21,056 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:21,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:21,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 03:20:21,269 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:21,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1288795907, now seen corresponding path program 6 times [2021-08-26 03:20:21,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:21,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635226235] [2021-08-26 03:20:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:21,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:21,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:21,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635226235] [2021-08-26 03:20:21,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635226235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:21,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252083167] [2021-08-26 03:20:21,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:20:21,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:21,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:21,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 03:20:21,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 03:20:21,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:21,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 03:20:21,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:21,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252083167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:21,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:21,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-26 03:20:21,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162334871] [2021-08-26 03:20:21,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:20:21,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:21,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:20:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:20:21,570 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-08-26 03:20:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:21,626 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-08-26 03:20:21,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:20:21,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 18 [2021-08-26 03:20:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:21,627 INFO L225 Difference]: With dead ends: 26 [2021-08-26 03:20:21,627 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 03:20:21,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:20:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 03:20:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-08-26 03:20:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 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) [2021-08-26 03:20:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-08-26 03:20:21,629 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-08-26 03:20:21,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:21,629 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-08-26 03:20:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-08-26 03:20:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-08-26 03:20:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 03:20:21,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:21,629 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:21,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:21,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:21,830 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:21,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:21,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1632628134, now seen corresponding path program 7 times [2021-08-26 03:20:21,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:21,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475365156] [2021-08-26 03:20:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:21,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:21,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:21,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475365156] [2021-08-26 03:20:21,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475365156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:21,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966540988] [2021-08-26 03:20:21,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:20:21,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:21,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:21,947 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:21,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 03:20:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:22,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 03:20:22,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:22,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966540988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:22,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:22,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-26 03:20:22,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401583238] [2021-08-26 03:20:22,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 03:20:22,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:22,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 03:20:22,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:20:22,312 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2021-08-26 03:20:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:22,399 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-08-26 03:20:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 03:20:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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 [2021-08-26 03:20:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:22,400 INFO L225 Difference]: With dead ends: 28 [2021-08-26 03:20:22,400 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 03:20:22,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:20:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 03:20:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-08-26 03:20:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 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) [2021-08-26 03:20:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-08-26 03:20:22,413 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-08-26 03:20:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:22,413 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-08-26 03:20:22,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2021-08-26 03:20:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-08-26 03:20:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 03:20:22,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:22,414 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:22,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:22,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 03:20:22,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1342916489, now seen corresponding path program 8 times [2021-08-26 03:20:22,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:22,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818908596] [2021-08-26 03:20:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:22,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:22,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:22,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818908596] [2021-08-26 03:20:22,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818908596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:22,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489483722] [2021-08-26 03:20:22,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:20:22,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:22,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:22,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:22,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 03:20:22,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:20:22,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 03:20:22,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:22,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489483722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:22,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:22,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-26 03:20:22,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387951539] [2021-08-26 03:20:22,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 03:20:22,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 03:20:22,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:20:22,980 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-08-26 03:20:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:23,074 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-08-26 03:20:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 03:20:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 22 [2021-08-26 03:20:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:23,075 INFO L225 Difference]: With dead ends: 30 [2021-08-26 03:20:23,075 INFO L226 Difference]: Without dead ends: 26 [2021-08-26 03:20:23,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:20:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-26 03:20:23,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-08-26 03:20:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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) [2021-08-26 03:20:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-08-26 03:20:23,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-08-26 03:20:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:23,078 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-08-26 03:20:23,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-08-26 03:20:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-08-26 03:20:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 03:20:23,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:23,079 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:23,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:23,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 03:20:23,293 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:23,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2102899884, now seen corresponding path program 9 times [2021-08-26 03:20:23,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:23,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273535711] [2021-08-26 03:20:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:23,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:23,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:23,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273535711] [2021-08-26 03:20:23,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273535711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:23,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278347124] [2021-08-26 03:20:23,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:20:23,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:23,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:23,419 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:23,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 03:20:23,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-26 03:20:23,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 03:20:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:23,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278347124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:23,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:23,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-08-26 03:20:23,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201903488] [2021-08-26 03:20:23,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 03:20:23,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 03:20:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:20:23,760 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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) [2021-08-26 03:20:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:23,865 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-08-26 03:20:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 03:20:23,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 [2021-08-26 03:20:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:23,866 INFO L225 Difference]: With dead ends: 32 [2021-08-26 03:20:23,866 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 03:20:23,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:20:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 03:20:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-08-26 03:20:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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) [2021-08-26 03:20:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-08-26 03:20:23,869 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-08-26 03:20:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:23,869 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-08-26 03:20:23,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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) [2021-08-26 03:20:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-08-26 03:20:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 03:20:23,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:23,870 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:23,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:24,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 03:20:24,074 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:24,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:24,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1992465137, now seen corresponding path program 10 times [2021-08-26 03:20:24,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:24,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617021134] [2021-08-26 03:20:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:24,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:24,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:24,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617021134] [2021-08-26 03:20:24,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617021134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:24,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097509356] [2021-08-26 03:20:24,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:20:24,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:24,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:24,237 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:24,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 03:20:24,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:20:24,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:24,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 03:20:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:24,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097509356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:24,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:24,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-08-26 03:20:24,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287875717] [2021-08-26 03:20:24,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 03:20:24,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:24,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 03:20:24,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:20:24,753 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2021-08-26 03:20:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:24,910 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-08-26 03:20:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 03:20:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 26 [2021-08-26 03:20:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:24,912 INFO L225 Difference]: With dead ends: 34 [2021-08-26 03:20:24,912 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 03:20:24,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:20:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 03:20:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-08-26 03:20:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2021-08-26 03:20:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-08-26 03:20:24,914 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-08-26 03:20:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:24,915 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-08-26 03:20:24,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2021-08-26 03:20:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-08-26 03:20:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 03:20:24,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:24,916 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:24,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:25,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-26 03:20:25,137 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:25,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:25,138 INFO L82 PathProgramCache]: Analyzing trace with hash 846760114, now seen corresponding path program 11 times [2021-08-26 03:20:25,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:25,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242821216] [2021-08-26 03:20:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:25,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:25,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:25,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242821216] [2021-08-26 03:20:25,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242821216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:25,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803666852] [2021-08-26 03:20:25,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:20:25,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:25,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:25,320 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:25,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 03:20:25,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-26 03:20:25,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 03:20:25,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:25,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803666852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:25,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:25,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-26 03:20:25,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347277025] [2021-08-26 03:20:25,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 03:20:25,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 03:20:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-26 03:20:25,716 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2021-08-26 03:20:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:25,871 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-08-26 03:20:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 03:20:25,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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 28 [2021-08-26 03:20:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:25,874 INFO L225 Difference]: With dead ends: 36 [2021-08-26 03:20:25,874 INFO L226 Difference]: Without dead ends: 32 [2021-08-26 03:20:25,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-26 03:20:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-26 03:20:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-08-26 03:20:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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) [2021-08-26 03:20:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-08-26 03:20:25,878 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-08-26 03:20:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:25,879 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-08-26 03:20:25,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 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) [2021-08-26 03:20:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-08-26 03:20:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 03:20:25,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:25,882 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:25,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:26,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:26,097 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2037993365, now seen corresponding path program 12 times [2021-08-26 03:20:26,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:26,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425919547] [2021-08-26 03:20:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:26,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:26,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:26,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425919547] [2021-08-26 03:20:26,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425919547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:26,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724770502] [2021-08-26 03:20:26,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:20:26,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:26,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:26,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:26,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 03:20:26,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-26 03:20:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 03:20:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:26,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724770502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:26,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:26,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-08-26 03:20:26,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649743507] [2021-08-26 03:20:26,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 03:20:26,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 03:20:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-26 03:20:26,924 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2021-08-26 03:20:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:27,129 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-08-26 03:20:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 03:20:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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 30 [2021-08-26 03:20:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:27,130 INFO L225 Difference]: With dead ends: 38 [2021-08-26 03:20:27,130 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 03:20:27,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-26 03:20:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 03:20:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-08-26 03:20:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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) [2021-08-26 03:20:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-08-26 03:20:27,132 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-08-26 03:20:27,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:27,132 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-08-26 03:20:27,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2021-08-26 03:20:27,132 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-08-26 03:20:27,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 03:20:27,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:27,133 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:27,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:27,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 03:20:27,333 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:27,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:27,334 INFO L82 PathProgramCache]: Analyzing trace with hash 56879544, now seen corresponding path program 13 times [2021-08-26 03:20:27,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:27,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623988598] [2021-08-26 03:20:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:27,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:27,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:27,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623988598] [2021-08-26 03:20:27,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623988598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:27,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495634820] [2021-08-26 03:20:27,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:20:27,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:27,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:27,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:27,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 03:20:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:27,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 03:20:27,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:28,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495634820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:28,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:28,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-26 03:20:28,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616135537] [2021-08-26 03:20:28,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 03:20:28,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:28,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 03:20:28,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:20:28,173 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2021-08-26 03:20:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:28,458 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-08-26 03:20:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 03:20:28,459 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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 32 [2021-08-26 03:20:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:28,459 INFO L225 Difference]: With dead ends: 40 [2021-08-26 03:20:28,459 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 03:20:28,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:20:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 03:20:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-08-26 03:20:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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) [2021-08-26 03:20:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-08-26 03:20:28,462 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-08-26 03:20:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:28,464 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-08-26 03:20:28,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2021-08-26 03:20:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-08-26 03:20:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 03:20:28,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:28,465 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:28,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-26 03:20:28,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 03:20:28,677 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:28,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1122990309, now seen corresponding path program 14 times [2021-08-26 03:20:28,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:28,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417205504] [2021-08-26 03:20:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:28,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:28,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417205504] [2021-08-26 03:20:28,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417205504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:28,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659841365] [2021-08-26 03:20:28,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:20:28,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:28,892 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:28,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 03:20:29,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:20:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 03:20:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:29,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659841365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:29,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:29,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-26 03:20:29,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509573045] [2021-08-26 03:20:29,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 03:20:29,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 03:20:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:20:29,330 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2021-08-26 03:20:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:29,556 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-08-26 03:20:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 03:20:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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 34 [2021-08-26 03:20:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:29,557 INFO L225 Difference]: With dead ends: 42 [2021-08-26 03:20:29,557 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 03:20:29,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:20:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 03:20:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-08-26 03:20:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 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) [2021-08-26 03:20:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-08-26 03:20:29,559 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-08-26 03:20:29,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:29,560 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-08-26 03:20:29,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 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) [2021-08-26 03:20:29,560 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-08-26 03:20:29,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 03:20:29,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:29,560 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:29,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:29,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:29,777 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1106552898, now seen corresponding path program 15 times [2021-08-26 03:20:29,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:29,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890773449] [2021-08-26 03:20:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:29,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:30,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:30,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890773449] [2021-08-26 03:20:30,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890773449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:30,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786087303] [2021-08-26 03:20:30,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:20:30,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:30,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:30,025 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:30,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 03:20:30,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-26 03:20:30,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:30,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 03:20:30,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:30,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786087303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:30,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:30,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-26 03:20:30,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103781295] [2021-08-26 03:20:30,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 03:20:30,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:30,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 03:20:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-26 03:20:30,579 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-08-26 03:20:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:30,836 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-08-26 03:20:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 03:20:30,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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 36 [2021-08-26 03:20:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:30,838 INFO L225 Difference]: With dead ends: 44 [2021-08-26 03:20:30,838 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 03:20:30,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-26 03:20:30,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 03:20:30,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-08-26 03:20:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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) [2021-08-26 03:20:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-08-26 03:20:30,846 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-08-26 03:20:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:30,847 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-08-26 03:20:30,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-08-26 03:20:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-08-26 03:20:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 03:20:30,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:30,847 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:30,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:31,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:31,053 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1804897185, now seen corresponding path program 16 times [2021-08-26 03:20:31,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:31,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600344982] [2021-08-26 03:20:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:31,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:31,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:31,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600344982] [2021-08-26 03:20:31,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600344982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:31,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533032067] [2021-08-26 03:20:31,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:20:31,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:31,290 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:31,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 03:20:31,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:20:31,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 03:20:31,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:31,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533032067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:31,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:31,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 21 [2021-08-26 03:20:31,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78378344] [2021-08-26 03:20:31,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 03:20:31,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 03:20:31,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:20:31,834 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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) [2021-08-26 03:20:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:32,112 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-08-26 03:20:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 03:20:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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 38 [2021-08-26 03:20:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:32,112 INFO L225 Difference]: With dead ends: 46 [2021-08-26 03:20:32,113 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 03:20:32,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:20:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 03:20:32,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-08-26 03:20:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 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) [2021-08-26 03:20:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-08-26 03:20:32,115 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-08-26 03:20:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:32,115 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-08-26 03:20:32,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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) [2021-08-26 03:20:32,115 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-08-26 03:20:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 03:20:32,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:32,116 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:32,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:32,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:32,323 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash -610250044, now seen corresponding path program 17 times [2021-08-26 03:20:32,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:32,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104015244] [2021-08-26 03:20:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:32,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:32,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:32,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104015244] [2021-08-26 03:20:32,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104015244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:32,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847088700] [2021-08-26 03:20:32,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:20:32,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:32,590 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:32,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 03:20:33,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-26 03:20:33,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:33,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 03:20:33,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:33,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847088700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:33,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:33,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-26 03:20:33,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188303861] [2021-08-26 03:20:33,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 03:20:33,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 03:20:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:20:33,439 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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) [2021-08-26 03:20:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:33,736 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-08-26 03:20:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 03:20:33,736 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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 40 [2021-08-26 03:20:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:33,736 INFO L225 Difference]: With dead ends: 48 [2021-08-26 03:20:33,737 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 03:20:33,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:20:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 03:20:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-08-26 03:20:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 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) [2021-08-26 03:20:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-08-26 03:20:33,739 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-08-26 03:20:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:33,740 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-08-26 03:20:33,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 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) [2021-08-26 03:20:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-08-26 03:20:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 03:20:33,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:33,740 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:33,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:33,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 03:20:33,945 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:33,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2010570023, now seen corresponding path program 18 times [2021-08-26 03:20:33,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:33,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501525420] [2021-08-26 03:20:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:33,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:34,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:34,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501525420] [2021-08-26 03:20:34,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501525420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:34,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706919216] [2021-08-26 03:20:34,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:20:34,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:34,237 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:34,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 03:20:34,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-08-26 03:20:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 03:20:34,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:35,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706919216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:35,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:35,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-08-26 03:20:35,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111516237] [2021-08-26 03:20:35,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-26 03:20:35,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-26 03:20:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-08-26 03:20:35,323 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 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) [2021-08-26 03:20:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:35,737 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-08-26 03:20:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 03:20:35,738 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 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 42 [2021-08-26 03:20:35,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:35,738 INFO L225 Difference]: With dead ends: 50 [2021-08-26 03:20:35,738 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 03:20:35,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-08-26 03:20:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 03:20:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-08-26 03:20:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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) [2021-08-26 03:20:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-08-26 03:20:35,741 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-08-26 03:20:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:35,742 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-08-26 03:20:35,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 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) [2021-08-26 03:20:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-08-26 03:20:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 03:20:35,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:35,742 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:35,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-26 03:20:35,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-26 03:20:35,948 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash -527148342, now seen corresponding path program 19 times [2021-08-26 03:20:35,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:35,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084926108] [2021-08-26 03:20:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:35,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:36,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:36,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084926108] [2021-08-26 03:20:36,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084926108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:36,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850988238] [2021-08-26 03:20:36,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:20:36,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:36,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:36,254 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:36,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 03:20:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:36,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 03:20:36,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:37,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850988238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:37,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:37,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-08-26 03:20:37,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115438783] [2021-08-26 03:20:37,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 03:20:37,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 03:20:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:20:37,370 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 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) [2021-08-26 03:20:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:37,876 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-08-26 03:20:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 03:20:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 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 44 [2021-08-26 03:20:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:37,877 INFO L225 Difference]: With dead ends: 52 [2021-08-26 03:20:37,877 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 03:20:37,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 671.8ms TimeCoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:20:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 03:20:37,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-08-26 03:20:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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) [2021-08-26 03:20:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-08-26 03:20:37,879 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-08-26 03:20:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-08-26 03:20:37,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 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) [2021-08-26 03:20:37,880 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-08-26 03:20:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 03:20:37,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:37,880 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:37,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-26 03:20:38,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:38,081 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:38,081 INFO L82 PathProgramCache]: Analyzing trace with hash 266927021, now seen corresponding path program 20 times [2021-08-26 03:20:38,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:38,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925901849] [2021-08-26 03:20:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:38,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:38,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:38,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925901849] [2021-08-26 03:20:38,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925901849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:38,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677258331] [2021-08-26 03:20:38,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:20:38,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:38,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:38,433 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:38,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 03:20:38,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:20:38,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:38,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 03:20:38,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:39,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677258331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:39,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:39,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 44 [2021-08-26 03:20:39,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750388418] [2021-08-26 03:20:39,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-26 03:20:39,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:39,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-26 03:20:39,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1748, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 03:20:39,620 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 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) [2021-08-26 03:20:40,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:40,112 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-08-26 03:20:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 03:20:40,113 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 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 46 [2021-08-26 03:20:40,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:40,113 INFO L225 Difference]: With dead ends: 54 [2021-08-26 03:20:40,113 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 03:20:40,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 727.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1748, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 03:20:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 03:20:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-08-26 03:20:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 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) [2021-08-26 03:20:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-08-26 03:20:40,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-08-26 03:20:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:40,116 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-08-26 03:20:40,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 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) [2021-08-26 03:20:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-08-26 03:20:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-26 03:20:40,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:40,117 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:40,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:40,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:40,321 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1130827824, now seen corresponding path program 21 times [2021-08-26 03:20:40,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:40,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019959229] [2021-08-26 03:20:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:40,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:40,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:40,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019959229] [2021-08-26 03:20:40,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019959229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:40,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557530809] [2021-08-26 03:20:40,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:20:40,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:40,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:40,663 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:40,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 03:20:41,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-08-26 03:20:41,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 03:20:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:41,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557530809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:41,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:41,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 26 [2021-08-26 03:20:41,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962531589] [2021-08-26 03:20:41,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 03:20:41,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 03:20:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-08-26 03:20:41,663 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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) [2021-08-26 03:20:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:42,058 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-08-26 03:20:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 03:20:42,059 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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 48 [2021-08-26 03:20:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:42,059 INFO L225 Difference]: With dead ends: 56 [2021-08-26 03:20:42,059 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 03:20:42,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-08-26 03:20:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 03:20:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-08-26 03:20:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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) [2021-08-26 03:20:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-08-26 03:20:42,061 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-08-26 03:20:42,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:42,062 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-08-26 03:20:42,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 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) [2021-08-26 03:20:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-08-26 03:20:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-26 03:20:42,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:42,062 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:42,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-26 03:20:42,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 03:20:42,266 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:42,266 INFO L82 PathProgramCache]: Analyzing trace with hash -48470221, now seen corresponding path program 22 times [2021-08-26 03:20:42,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:42,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389418963] [2021-08-26 03:20:42,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:42,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:42,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:42,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389418963] [2021-08-26 03:20:42,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389418963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:42,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61003502] [2021-08-26 03:20:42,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:20:42,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:42,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:42,634 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:42,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 03:20:43,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:20:43,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:43,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-26 03:20:43,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:43,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61003502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:43,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:43,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 48 [2021-08-26 03:20:43,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406248002] [2021-08-26 03:20:43,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-26 03:20:43,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-26 03:20:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:20:43,975 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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) [2021-08-26 03:20:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:44,569 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-08-26 03:20:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-26 03:20:44,569 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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 50 [2021-08-26 03:20:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:44,570 INFO L225 Difference]: With dead ends: 58 [2021-08-26 03:20:44,570 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 03:20:44,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:20:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 03:20:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-08-26 03:20:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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) [2021-08-26 03:20:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-08-26 03:20:44,573 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-08-26 03:20:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:44,574 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-08-26 03:20:44,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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) [2021-08-26 03:20:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-08-26 03:20:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 03:20:44,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:44,574 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:44,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:44,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 03:20:44,789 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash 715100630, now seen corresponding path program 23 times [2021-08-26 03:20:44,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:44,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964349302] [2021-08-26 03:20:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:44,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:45,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:45,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964349302] [2021-08-26 03:20:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964349302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:45,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013508505] [2021-08-26 03:20:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:20:45,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:45,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:45,186 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:45,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 03:20:47,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-08-26 03:20:47,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:47,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-26 03:20:47,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:47,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013508505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:47,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:47,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-26 03:20:47,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578780737] [2021-08-26 03:20:47,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 03:20:47,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 03:20:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-08-26 03:20:47,874 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 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) [2021-08-26 03:20:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:48,354 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-08-26 03:20:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 03:20:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 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 52 [2021-08-26 03:20:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:48,355 INFO L225 Difference]: With dead ends: 60 [2021-08-26 03:20:48,355 INFO L226 Difference]: Without dead ends: 56 [2021-08-26 03:20:48,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-08-26 03:20:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-26 03:20:48,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-08-26 03:20:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 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) [2021-08-26 03:20:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-08-26 03:20:48,360 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-08-26 03:20:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:48,361 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-08-26 03:20:48,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 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) [2021-08-26 03:20:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-08-26 03:20:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-26 03:20:48,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:48,361 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:48,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:48,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 03:20:48,568 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash 67280825, now seen corresponding path program 24 times [2021-08-26 03:20:48,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:48,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39892921] [2021-08-26 03:20:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:48,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:48,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:48,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39892921] [2021-08-26 03:20:48,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39892921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:48,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822523873] [2021-08-26 03:20:48,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:20:48,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:48,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:48,974 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:48,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 03:20:49,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-08-26 03:20:49,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-26 03:20:49,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:50,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822523873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:50,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:50,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 41 [2021-08-26 03:20:50,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330074178] [2021-08-26 03:20:50,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-26 03:20:50,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:50,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-26 03:20:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:20:50,678 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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) [2021-08-26 03:20:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:51,406 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-08-26 03:20:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 03:20:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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 54 [2021-08-26 03:20:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:51,406 INFO L225 Difference]: With dead ends: 62 [2021-08-26 03:20:51,407 INFO L226 Difference]: Without dead ends: 58 [2021-08-26 03:20:51,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 681.8ms TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:20:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-26 03:20:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-08-26 03:20:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 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) [2021-08-26 03:20:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-08-26 03:20:51,409 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-08-26 03:20:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-08-26 03:20:51,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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) [2021-08-26 03:20:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-08-26 03:20:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-26 03:20:51,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:51,410 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:51,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:51,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 03:20:51,610 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash 282706140, now seen corresponding path program 25 times [2021-08-26 03:20:51,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:51,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296693552] [2021-08-26 03:20:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:51,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:52,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:52,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296693552] [2021-08-26 03:20:52,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296693552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:52,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117870726] [2021-08-26 03:20:52,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:20:52,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:52,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:52,031 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:52,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 03:20:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-26 03:20:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:53,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117870726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:53,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:53,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2021-08-26 03:20:53,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828823825] [2021-08-26 03:20:53,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-26 03:20:53,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-26 03:20:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2683, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 03:20:53,756 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 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) [2021-08-26 03:20:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:54,467 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-08-26 03:20:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-26 03:20:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 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 56 [2021-08-26 03:20:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:54,468 INFO L225 Difference]: With dead ends: 64 [2021-08-26 03:20:54,468 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 03:20:54,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1057.9ms TimeCoverageRelationStatistics Valid=179, Invalid=2683, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 03:20:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 03:20:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-08-26 03:20:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 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) [2021-08-26 03:20:54,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-08-26 03:20:54,470 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-08-26 03:20:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:54,470 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-08-26 03:20:54,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 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) [2021-08-26 03:20:54,471 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-08-26 03:20:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-26 03:20:54,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:54,471 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:54,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:54,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:54,674 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1148003647, now seen corresponding path program 26 times [2021-08-26 03:20:54,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:54,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080115028] [2021-08-26 03:20:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:54,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:55,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:55,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080115028] [2021-08-26 03:20:55,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080115028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:55,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023726915] [2021-08-26 03:20:55,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:20:55,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:55,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:55,127 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:55,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 03:20:55,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:20:55,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-26 03:20:55,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:56,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023726915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:56,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:56,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-08-26 03:20:56,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238292947] [2021-08-26 03:20:56,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 03:20:56,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 03:20:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:20:56,064 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2021-08-26 03:20:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:56,632 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-08-26 03:20:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 03:20:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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 58 [2021-08-26 03:20:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:56,633 INFO L225 Difference]: With dead ends: 66 [2021-08-26 03:20:56,633 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 03:20:56,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:20:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 03:20:56,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-08-26 03:20:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 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) [2021-08-26 03:20:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-08-26 03:20:56,635 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-08-26 03:20:56,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:56,635 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-08-26 03:20:56,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2021-08-26 03:20:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-08-26 03:20:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-26 03:20:56,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:56,635 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:56,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:56,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:56,853 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash -524747550, now seen corresponding path program 27 times [2021-08-26 03:20:56,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:56,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794773987] [2021-08-26 03:20:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:56,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:56,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:57,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:57,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794773987] [2021-08-26 03:20:57,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794773987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:57,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644427490] [2021-08-26 03:20:57,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:20:57,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:57,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:57,315 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:57,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 03:20:58,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-08-26 03:20:58,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:58,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-26 03:20:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:58,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644427490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:58,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:58,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2021-08-26 03:20:58,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420462550] [2021-08-26 03:20:58,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-26 03:20:58,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:58,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-26 03:20:58,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-08-26 03:20:58,664 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 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) [2021-08-26 03:20:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:59,279 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-08-26 03:20:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 03:20:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 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 60 [2021-08-26 03:20:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:59,280 INFO L225 Difference]: With dead ends: 68 [2021-08-26 03:20:59,280 INFO L226 Difference]: Without dead ends: 64 [2021-08-26 03:20:59,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-08-26 03:20:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-26 03:20:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-08-26 03:20:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 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) [2021-08-26 03:20:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-08-26 03:20:59,282 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-08-26 03:20:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:59,282 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-08-26 03:20:59,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 32 states have internal predecessors, (64), 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) [2021-08-26 03:20:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-08-26 03:20:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-26 03:20:59,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:59,283 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:59,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-26 03:20:59,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-26 03:20:59,483 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1720879163, now seen corresponding path program 28 times [2021-08-26 03:20:59,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:59,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396744459] [2021-08-26 03:20:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:59,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:59,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:59,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396744459] [2021-08-26 03:20:59,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396744459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:59,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198021635] [2021-08-26 03:20:59,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:20:59,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:59,991 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:20:59,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 03:21:00,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:21:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:21:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-26 03:21:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:01,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198021635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:01,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:01,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 60 [2021-08-26 03:21:01,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933041413] [2021-08-26 03:21:01,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-26 03:21:01,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-26 03:21:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3340, Unknown=0, NotChecked=0, Total=3540 [2021-08-26 03:21:01,964 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 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) [2021-08-26 03:21:02,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:02,888 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-08-26 03:21:02,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-26 03:21:02,889 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 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 62 [2021-08-26 03:21:02,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:02,889 INFO L225 Difference]: With dead ends: 70 [2021-08-26 03:21:02,889 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 03:21:02,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1289.0ms TimeCoverageRelationStatistics Valid=200, Invalid=3340, Unknown=0, NotChecked=0, Total=3540 [2021-08-26 03:21:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 03:21:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-08-26 03:21:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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) [2021-08-26 03:21:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-08-26 03:21:02,892 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-08-26 03:21:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:02,892 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-08-26 03:21:02,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 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) [2021-08-26 03:21:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-08-26 03:21:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-26 03:21:02,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:21:02,893 INFO L512 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-08-26 03:21:02,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-26 03:21:03,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:03,097 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:21:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:21:03,097 INFO L82 PathProgramCache]: Analyzing trace with hash -152123928, now seen corresponding path program 29 times [2021-08-26 03:21:03,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:21:03,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084961320] [2021-08-26 03:21:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:21:03,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:21:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:03,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:21:03,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084961320] [2021-08-26 03:21:03,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084961320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:03,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251816786] [2021-08-26 03:21:03,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:21:03,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:03,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:21:03,611 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:21:03,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 03:21:16,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-08-26 03:21:16,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:21:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-26 03:21:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:16,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251816786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:16,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:16,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-08-26 03:21:16,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582774050] [2021-08-26 03:21:16,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-26 03:21:16,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:16,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-26 03:21:16,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 03:21:16,477 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 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) [2021-08-26 03:21:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:17,141 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-08-26 03:21:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 03:21:17,142 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 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) Word has length 64 [2021-08-26 03:21:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:17,142 INFO L225 Difference]: With dead ends: 72 [2021-08-26 03:21:17,142 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 03:21:17,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 437.2ms TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 03:21:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 03:21:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-08-26 03:21:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 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) [2021-08-26 03:21:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-08-26 03:21:17,144 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-08-26 03:21:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:17,144 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-08-26 03:21:17,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 33 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) [2021-08-26 03:21:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-08-26 03:21:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-26 03:21:17,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:21:17,145 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-08-26 03:21:17,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-26 03:21:17,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:17,353 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:21:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:21:17,354 INFO L82 PathProgramCache]: Analyzing trace with hash -111863989, now seen corresponding path program 30 times [2021-08-26 03:21:17,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:21:17,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832235641] [2021-08-26 03:21:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:21:17,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:21:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:17,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:21:17,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832235641] [2021-08-26 03:21:17,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832235641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:17,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224430193] [2021-08-26 03:21:17,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:21:17,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:21:17,919 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:21:17,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-26 03:21:19,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-08-26 03:21:19,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:21:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-26 03:21:19,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:20,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224430193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:20,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:20,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2021-08-26 03:21:20,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274292022] [2021-08-26 03:21:20,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-26 03:21:20,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-26 03:21:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 03:21:20,339 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 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) [2021-08-26 03:21:21,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:21,265 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-08-26 03:21:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-26 03:21:21,266 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 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 66 [2021-08-26 03:21:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:21,266 INFO L225 Difference]: With dead ends: 74 [2021-08-26 03:21:21,266 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 03:21:21,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 954.1ms TimeCoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 03:21:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 03:21:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-08-26 03:21:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 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) [2021-08-26 03:21:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-08-26 03:21:21,269 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-08-26 03:21:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:21,269 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-08-26 03:21:21,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 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) [2021-08-26 03:21:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-08-26 03:21:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-26 03:21:21,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:21:21,269 INFO L512 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-08-26 03:21:21,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-26 03:21:21,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-26 03:21:21,470 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:21:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:21:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash -76768274, now seen corresponding path program 31 times [2021-08-26 03:21:21,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:21:21,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936921244] [2021-08-26 03:21:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:21:21,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:21:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:22,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:21:22,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936921244] [2021-08-26 03:21:22,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936921244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:22,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466005533] [2021-08-26 03:21:22,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:21:22,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:22,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:21:22,097 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:21:22,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-26 03:21:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:22,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-26 03:21:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:23,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466005533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:23,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:23,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-08-26 03:21:23,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394911192] [2021-08-26 03:21:23,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 03:21:23,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:23,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 03:21:23,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 03:21:23,371 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 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) [2021-08-26 03:21:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:24,136 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-08-26 03:21:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 03:21:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 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 68 [2021-08-26 03:21:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:24,137 INFO L225 Difference]: With dead ends: 76 [2021-08-26 03:21:24,137 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 03:21:24,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 03:21:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 03:21:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-08-26 03:21:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 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) [2021-08-26 03:21:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-08-26 03:21:24,139 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-08-26 03:21:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-08-26 03:21:24,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 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) [2021-08-26 03:21:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-08-26 03:21:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-26 03:21:24,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:21:24,140 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-08-26 03:21:24,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-26 03:21:24,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-26 03:21:24,345 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:21:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:21:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash -709524527, now seen corresponding path program 32 times [2021-08-26 03:21:24,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:21:24,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879466325] [2021-08-26 03:21:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:21:24,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:21:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:24,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:21:24,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879466325] [2021-08-26 03:21:24,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879466325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:24,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382454864] [2021-08-26 03:21:24,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:21:24,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:24,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:21:24,993 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:21:24,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-26 03:21:25,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:21:25,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:21:25,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-26 03:21:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:27,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382454864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:27,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:27,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 68 [2021-08-26 03:21:27,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512522780] [2021-08-26 03:21:27,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-08-26 03:21:27,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:27,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-08-26 03:21:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=4328, Unknown=0, NotChecked=0, Total=4556 [2021-08-26 03:21:27,460 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 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) [2021-08-26 03:21:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:28,642 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-08-26 03:21:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-26 03:21:28,643 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 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 70 [2021-08-26 03:21:28,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:28,643 INFO L225 Difference]: With dead ends: 78 [2021-08-26 03:21:28,643 INFO L226 Difference]: Without dead ends: 74 [2021-08-26 03:21:28,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1676.6ms TimeCoverageRelationStatistics Valid=228, Invalid=4328, Unknown=0, NotChecked=0, Total=4556 [2021-08-26 03:21:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-26 03:21:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-08-26 03:21:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 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) [2021-08-26 03:21:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-08-26 03:21:28,646 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-08-26 03:21:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:28,646 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-08-26 03:21:28,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 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) [2021-08-26 03:21:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-08-26 03:21:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-26 03:21:28,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:21:28,647 INFO L512 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-08-26 03:21:28,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-26 03:21:28,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-26 03:21:28,851 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:21:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:21:28,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1097072372, now seen corresponding path program 33 times [2021-08-26 03:21:28,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:21:28,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592129590] [2021-08-26 03:21:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:21:28,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:21:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:29,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:21:29,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592129590] [2021-08-26 03:21:29,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592129590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:29,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845949235] [2021-08-26 03:21:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:21:29,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:21:29,546 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:21:29,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-26 03:21:31,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-08-26 03:21:31,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:21:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 73 conjunts are in the unsatisfiable core [2021-08-26 03:21:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:32,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845949235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:32,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:32,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-08-26 03:21:32,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307099483] [2021-08-26 03:21:32,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-26 03:21:32,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-26 03:21:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 03:21:32,063 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 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) [2021-08-26 03:21:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:32,917 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-08-26 03:21:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-26 03:21:32,917 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 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 72 [2021-08-26 03:21:32,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:32,918 INFO L225 Difference]: With dead ends: 80 [2021-08-26 03:21:32,918 INFO L226 Difference]: Without dead ends: 76 [2021-08-26 03:21:32,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 605.2ms TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 03:21:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-26 03:21:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-08-26 03:21:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 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) [2021-08-26 03:21:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-08-26 03:21:32,920 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-08-26 03:21:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:32,923 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-08-26 03:21:32,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 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) [2021-08-26 03:21:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-08-26 03:21:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-26 03:21:32,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:21:32,924 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-08-26 03:21:32,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-26 03:21:33,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:33,131 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:21:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:21:33,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2069904727, now seen corresponding path program 34 times [2021-08-26 03:21:33,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:21:33,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633081283] [2021-08-26 03:21:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:21:33,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:21:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:33,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:21:33,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633081283] [2021-08-26 03:21:33,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633081283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:33,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265366884] [2021-08-26 03:21:33,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:21:33,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:33,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:21:33,777 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:21:33,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-26 03:21:34,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:21:34,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:21:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-26 03:21:34,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:35,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265366884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:35,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:35,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 41 [2021-08-26 03:21:35,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278353538] [2021-08-26 03:21:35,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-26 03:21:35,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:35,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-26 03:21:35,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:21:35,289 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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) [2021-08-26 03:21:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:36,284 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-08-26 03:21:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 03:21:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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 74 [2021-08-26 03:21:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:36,285 INFO L225 Difference]: With dead ends: 82 [2021-08-26 03:21:36,285 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 03:21:36,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 653.6ms TimeCoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:21:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 03:21:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-08-26 03:21:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 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) [2021-08-26 03:21:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-08-26 03:21:36,287 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-08-26 03:21:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:36,288 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-08-26 03:21:36,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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) [2021-08-26 03:21:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-08-26 03:21:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-26 03:21:36,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:21:36,288 INFO L512 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-08-26 03:21:36,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-26 03:21:36,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-26 03:21:36,493 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:21:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:21:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 658927354, now seen corresponding path program 35 times [2021-08-26 03:21:36,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:21:36,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637860223] [2021-08-26 03:21:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:21:36,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:21:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:37,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:21:37,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637860223] [2021-08-26 03:21:37,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637860223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:37,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861849047] [2021-08-26 03:21:37,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:21:37,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:37,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:21:37,213 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:21:37,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-26 03:22:19,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-08-26 03:22:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:22:19,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 73 conjunts are in the unsatisfiable core [2021-08-26 03:22:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:22:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:19,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861849047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:19,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:22:19,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-08-26 03:22:19,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131729167] [2021-08-26 03:22:19,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-26 03:22:19,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:22:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-26 03:22:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:22:19,659 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) [2021-08-26 03:22:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:22:20,627 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-08-26 03:22:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-26 03:22:20,627 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) Word has length 76 [2021-08-26 03:22:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:22:20,628 INFO L225 Difference]: With dead ends: 84 [2021-08-26 03:22:20,628 INFO L226 Difference]: Without dead ends: 80 [2021-08-26 03:22:20,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 618.9ms TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:22:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-26 03:22:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-08-26 03:22:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 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) [2021-08-26 03:22:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-08-26 03:22:20,631 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-08-26 03:22:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:22:20,631 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-08-26 03:22:20,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) [2021-08-26 03:22:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-08-26 03:22:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-26 03:22:20,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:22:20,632 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-08-26 03:22:20,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-26 03:22:20,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-26 03:22:20,845 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:22:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:22:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1919337437, now seen corresponding path program 36 times [2021-08-26 03:22:20,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:22:20,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273485463] [2021-08-26 03:22:20,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:22:20,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:22:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:22:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:21,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:22:21,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273485463] [2021-08-26 03:22:21,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273485463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:21,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366741789] [2021-08-26 03:22:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:22:21,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:22:21,595 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:22:21,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-26 03:22:25,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-08-26 03:22:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:22:25,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-26 03:22:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:22:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:26,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366741789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:26,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:22:26,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40] total 59 [2021-08-26 03:22:26,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682606973] [2021-08-26 03:22:26,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-26 03:22:26,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:22:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-26 03:22:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3234, Unknown=0, NotChecked=0, Total=3422 [2021-08-26 03:22:26,965 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 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) [2021-08-26 03:22:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:22:28,271 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-08-26 03:22:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-26 03:22:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 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 78 [2021-08-26 03:22:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:22:28,272 INFO L225 Difference]: With dead ends: 86 [2021-08-26 03:22:28,272 INFO L226 Difference]: Without dead ends: 82 [2021-08-26 03:22:28,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1354.1ms TimeCoverageRelationStatistics Valid=188, Invalid=3234, Unknown=0, NotChecked=0, Total=3422 [2021-08-26 03:22:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-26 03:22:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-08-26 03:22:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 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) [2021-08-26 03:22:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-08-26 03:22:28,274 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-08-26 03:22:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:22:28,274 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-08-26 03:22:28,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 59 states have internal predecessors, (118), 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) [2021-08-26 03:22:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-08-26 03:22:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-26 03:22:28,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:22:28,275 INFO L512 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-08-26 03:22:28,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-26 03:22:28,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:28,484 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:22:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:22:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1992649728, now seen corresponding path program 37 times [2021-08-26 03:22:28,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:22:28,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139391771] [2021-08-26 03:22:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:22:28,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:22:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:22:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:29,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:22:29,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139391771] [2021-08-26 03:22:29,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139391771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:29,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171958295] [2021-08-26 03:22:29,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:22:29,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:29,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:22:29,238 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:22:29,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-26 03:22:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:22:30,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 77 conjunts are in the unsatisfiable core [2021-08-26 03:22:30,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:22:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:30,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171958295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:30,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:22:30,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-08-26 03:22:30,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421039104] [2021-08-26 03:22:30,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-26 03:22:30,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:22:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-26 03:22:30,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:22:30,905 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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) [2021-08-26 03:22:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:22:31,965 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-08-26 03:22:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-26 03:22:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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 80 [2021-08-26 03:22:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:22:31,966 INFO L225 Difference]: With dead ends: 88 [2021-08-26 03:22:31,966 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 03:22:31,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 660.1ms TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 03:22:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 03:22:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-08-26 03:22:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 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) [2021-08-26 03:22:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-08-26 03:22:31,968 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-08-26 03:22:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:22:31,968 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-08-26 03:22:31,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 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) [2021-08-26 03:22:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-08-26 03:22:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-26 03:22:31,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:22:31,969 INFO L512 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-08-26 03:22:31,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-26 03:22:32,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-26 03:22:32,181 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:22:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:22:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash -568682653, now seen corresponding path program 38 times [2021-08-26 03:22:32,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:22:32,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083758435] [2021-08-26 03:22:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:22:32,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:22:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:22:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:32,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:22:32,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083758435] [2021-08-26 03:22:32,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083758435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:32,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884887397] [2021-08-26 03:22:32,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:22:32,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:32,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:22:32,957 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:22:32,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-26 03:22:34,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:22:34,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:22:34,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-26 03:22:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:22:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:34,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884887397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:34,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:22:34,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-08-26 03:22:34,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263571381] [2021-08-26 03:22:34,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 03:22:34,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:22:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 03:22:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:22:34,651 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 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) [2021-08-26 03:22:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:22:35,765 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-08-26 03:22:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-26 03:22:35,766 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 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 82 [2021-08-26 03:22:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:22:35,766 INFO L225 Difference]: With dead ends: 90 [2021-08-26 03:22:35,766 INFO L226 Difference]: Without dead ends: 86 [2021-08-26 03:22:35,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 670.6ms TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:22:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-26 03:22:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-08-26 03:22:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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) [2021-08-26 03:22:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-08-26 03:22:35,769 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-08-26 03:22:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:22:35,769 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-08-26 03:22:35,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 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) [2021-08-26 03:22:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-08-26 03:22:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-26 03:22:35,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:22:35,770 INFO L512 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2021-08-26 03:22:35,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-26 03:22:35,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:35,978 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:22:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:22:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash -992840186, now seen corresponding path program 39 times [2021-08-26 03:22:35,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:22:35,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293716743] [2021-08-26 03:22:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:22:35,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:22:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:22:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:36,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:22:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293716743] [2021-08-26 03:22:36,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293716743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:36,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466404265] [2021-08-26 03:22:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:22:36,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:22:36,886 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:22:36,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-26 03:22:38,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-08-26 03:22:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:22:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-26 03:22:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:22:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:39,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466404265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:39,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:22:39,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-08-26 03:22:39,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807631965] [2021-08-26 03:22:39,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-26 03:22:39,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:22:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-26 03:22:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 03:22:39,333 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 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) [2021-08-26 03:22:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:22:40,557 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-08-26 03:22:40,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-26 03:22:40,558 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 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 84 [2021-08-26 03:22:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:22:40,558 INFO L225 Difference]: With dead ends: 92 [2021-08-26 03:22:40,558 INFO L226 Difference]: Without dead ends: 88 [2021-08-26 03:22:40,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 803.6ms TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 03:22:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-26 03:22:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-26 03:22:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 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) [2021-08-26 03:22:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-08-26 03:22:40,560 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-08-26 03:22:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:22:40,561 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-08-26 03:22:40,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 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) [2021-08-26 03:22:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-08-26 03:22:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-26 03:22:40,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:22:40,561 INFO L512 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2021-08-26 03:22:40,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-26 03:22:40,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:40,769 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:22:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:22:40,770 INFO L82 PathProgramCache]: Analyzing trace with hash -586336279, now seen corresponding path program 40 times [2021-08-26 03:22:40,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:22:40,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412296992] [2021-08-26 03:22:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:22:40,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:22:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:22:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:41,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:22:41,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412296992] [2021-08-26 03:22:41,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412296992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:41,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870011220] [2021-08-26 03:22:41,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:22:41,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:41,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:22:41,722 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:22:41,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-26 03:22:43,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:22:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:22:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-26 03:22:43,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:22:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:43,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870011220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:43,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:22:43,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 53 [2021-08-26 03:22:43,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647468754] [2021-08-26 03:22:43,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-26 03:22:43,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:22:43,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-26 03:22:43,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2596, Unknown=0, NotChecked=0, Total=2756 [2021-08-26 03:22:43,904 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 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) [2021-08-26 03:22:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:22:45,313 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-08-26 03:22:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-26 03:22:45,314 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 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 86 [2021-08-26 03:22:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:22:45,314 INFO L225 Difference]: With dead ends: 94 [2021-08-26 03:22:45,314 INFO L226 Difference]: Without dead ends: 90 [2021-08-26 03:22:45,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1188.3ms TimeCoverageRelationStatistics Valid=160, Invalid=2596, Unknown=0, NotChecked=0, Total=2756 [2021-08-26 03:22:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-26 03:22:45,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-08-26 03:22:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 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) [2021-08-26 03:22:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-08-26 03:22:45,317 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-08-26 03:22:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:22:45,317 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-08-26 03:22:45,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 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) [2021-08-26 03:22:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-08-26 03:22:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-26 03:22:45,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:22:45,318 INFO L512 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2021-08-26 03:22:45,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-26 03:22:45,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-26 03:22:45,518 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:22:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:22:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash -778105588, now seen corresponding path program 41 times [2021-08-26 03:22:45,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:22:45,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366068776] [2021-08-26 03:22:45,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:22:45,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:22:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:22:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:22:46,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:22:46,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366068776] [2021-08-26 03:22:46,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366068776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:22:46,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062663231] [2021-08-26 03:22:46,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:22:46,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:22:46,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:22:46,501 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:22:46,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-26 03:23:59,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-08-26 03:23:59,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:23:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-26 03:23:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:24:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:00,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062663231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:00,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:24:00,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45] total 66 [2021-08-26 03:24:00,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95959329] [2021-08-26 03:24:00,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-26 03:24:00,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:24:00,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-26 03:24:00,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4079, Unknown=0, NotChecked=0, Total=4290 [2021-08-26 03:24:00,634 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 66 states have internal predecessors, (132), 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) [2021-08-26 03:24:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:24:02,254 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-08-26 03:24:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-26 03:24:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 66 states have internal predecessors, (132), 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 88 [2021-08-26 03:24:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:24:02,255 INFO L225 Difference]: With dead ends: 96 [2021-08-26 03:24:02,255 INFO L226 Difference]: Without dead ends: 92 [2021-08-26 03:24:02,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1755.2ms TimeCoverageRelationStatistics Valid=211, Invalid=4079, Unknown=0, NotChecked=0, Total=4290 [2021-08-26 03:24:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-26 03:24:02,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-08-26 03:24:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 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) [2021-08-26 03:24:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-08-26 03:24:02,258 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-08-26 03:24:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:24:02,258 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-08-26 03:24:02,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 66 states have internal predecessors, (132), 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) [2021-08-26 03:24:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-08-26 03:24:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-26 03:24:02,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:24:02,259 INFO L512 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2021-08-26 03:24:02,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-26 03:24:02,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-26 03:24:02,465 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:24:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:24:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash -384817809, now seen corresponding path program 42 times [2021-08-26 03:24:02,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:24:02,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382494350] [2021-08-26 03:24:02,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:24:02,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:24:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:24:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:03,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:24:03,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382494350] [2021-08-26 03:24:03,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382494350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:03,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690192840] [2021-08-26 03:24:03,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:24:03,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:24:03,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:24:03,408 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:24:03,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-26 03:24:16,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-08-26 03:24:16,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:24:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-26 03:24:16,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:24:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:18,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690192840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:18,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:24:18,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2021-08-26 03:24:18,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165547888] [2021-08-26 03:24:18,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-26 03:24:18,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:24:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-26 03:24:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=4206, Unknown=0, NotChecked=0, Total=4422 [2021-08-26 03:24:18,272 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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) [2021-08-26 03:24:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:24:19,912 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-08-26 03:24:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-26 03:24:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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 90 [2021-08-26 03:24:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:24:19,913 INFO L225 Difference]: With dead ends: 98 [2021-08-26 03:24:19,913 INFO L226 Difference]: Without dead ends: 94 [2021-08-26 03:24:19,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1709.3ms TimeCoverageRelationStatistics Valid=216, Invalid=4206, Unknown=0, NotChecked=0, Total=4422 [2021-08-26 03:24:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-26 03:24:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-08-26 03:24:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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) [2021-08-26 03:24:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-08-26 03:24:19,915 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-08-26 03:24:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:24:19,916 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-08-26 03:24:19,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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) [2021-08-26 03:24:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-08-26 03:24:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-26 03:24:19,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:24:19,916 INFO L512 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-08-26 03:24:19,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-26 03:24:20,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-26 03:24:20,128 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:24:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:24:20,128 INFO L82 PathProgramCache]: Analyzing trace with hash -392384238, now seen corresponding path program 43 times [2021-08-26 03:24:20,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:24:20,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835860481] [2021-08-26 03:24:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:24:20,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:24:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:24:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:21,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:24:21,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835860481] [2021-08-26 03:24:21,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835860481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:21,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640537776] [2021-08-26 03:24:21,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:24:21,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:24:21,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:24:21,137 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:24:21,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-26 03:24:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:24:22,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-26 03:24:22,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:24:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:25,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640537776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:25,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:24:25,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47] total 90 [2021-08-26 03:24:25,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819143826] [2021-08-26 03:24:25,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-26 03:24:25,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:24:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-26 03:24:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=7705, Unknown=0, NotChecked=0, Total=8010 [2021-08-26 03:24:25,310 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 90 states, 90 states have (on average 2.0) internal successors, (180), 90 states have internal predecessors, (180), 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) [2021-08-26 03:24:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:24:27,499 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-08-26 03:24:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-26 03:24:27,500 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 90 states have internal predecessors, (180), 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 92 [2021-08-26 03:24:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:24:27,500 INFO L225 Difference]: With dead ends: 100 [2021-08-26 03:24:27,500 INFO L226 Difference]: Without dead ends: 96 [2021-08-26 03:24:27,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 2826.1ms TimeCoverageRelationStatistics Valid=305, Invalid=7705, Unknown=0, NotChecked=0, Total=8010 [2021-08-26 03:24:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-26 03:24:27,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-08-26 03:24:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 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) [2021-08-26 03:24:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-08-26 03:24:27,504 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-08-26 03:24:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:24:27,504 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-08-26 03:24:27,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 90 states have internal predecessors, (180), 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) [2021-08-26 03:24:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-08-26 03:24:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-26 03:24:27,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:24:27,505 INFO L512 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2021-08-26 03:24:27,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-26 03:24:27,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:24:27,709 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:24:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:24:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash 926212085, now seen corresponding path program 44 times [2021-08-26 03:24:27,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:24:27,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079288111] [2021-08-26 03:24:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:24:27,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:24:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:24:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:28,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:24:28,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079288111] [2021-08-26 03:24:28,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079288111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:28,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920354260] [2021-08-26 03:24:28,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:24:28,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:24:28,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:24:28,737 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:24:28,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-26 03:24:30,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:24:30,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:24:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-26 03:24:30,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:24:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:30,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920354260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:30,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:24:30,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-08-26 03:24:30,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103201708] [2021-08-26 03:24:30,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-26 03:24:30,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:24:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-26 03:24:30,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:24:30,899 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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) [2021-08-26 03:24:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:24:32,381 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-08-26 03:24:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-26 03:24:32,382 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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 94 [2021-08-26 03:24:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:24:32,382 INFO L225 Difference]: With dead ends: 102 [2021-08-26 03:24:32,382 INFO L226 Difference]: Without dead ends: 98 [2021-08-26 03:24:32,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 903.9ms TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:24:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-26 03:24:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-08-26 03:24:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 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) [2021-08-26 03:24:32,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-08-26 03:24:32,385 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-08-26 03:24:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:24:32,385 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-08-26 03:24:32,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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) [2021-08-26 03:24:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-08-26 03:24:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-26 03:24:32,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:24:32,386 INFO L512 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2021-08-26 03:24:32,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-26 03:24:32,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-26 03:24:32,594 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:24:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:24:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1081926168, now seen corresponding path program 45 times [2021-08-26 03:24:32,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:24:32,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855336106] [2021-08-26 03:24:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:24:32,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:24:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:24:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:33,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:24:33,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855336106] [2021-08-26 03:24:33,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855336106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:33,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157675494] [2021-08-26 03:24:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:24:33,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:24:33,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:24:33,642 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:24:33,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-26 03:24:36,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-08-26 03:24:36,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:24:36,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 96 conjunts are in the unsatisfiable core [2021-08-26 03:24:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:24:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:37,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157675494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:37,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:24:37,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49] total 50 [2021-08-26 03:24:37,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733872419] [2021-08-26 03:24:37,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-26 03:24:37,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:24:37,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-26 03:24:37,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 03:24:37,342 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 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) [2021-08-26 03:24:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:24:38,928 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-08-26 03:24:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-26 03:24:38,929 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 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 96 [2021-08-26 03:24:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:24:38,929 INFO L225 Difference]: With dead ends: 104 [2021-08-26 03:24:38,929 INFO L226 Difference]: Without dead ends: 100 [2021-08-26 03:24:38,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 955.4ms TimeCoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 03:24:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-26 03:24:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-08-26 03:24:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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) [2021-08-26 03:24:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-08-26 03:24:38,932 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-08-26 03:24:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:24:38,932 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-08-26 03:24:38,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 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) [2021-08-26 03:24:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-08-26 03:24:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-08-26 03:24:38,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:24:38,932 INFO L512 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-08-26 03:24:38,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-26 03:24:39,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-26 03:24:39,133 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:24:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:24:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash 399304571, now seen corresponding path program 46 times [2021-08-26 03:24:39,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:24:39,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316456703] [2021-08-26 03:24:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:24:39,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:24:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:24:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:40,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:24:40,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316456703] [2021-08-26 03:24:40,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316456703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:40,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539452741] [2021-08-26 03:24:40,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:24:40,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:24:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:24:40,250 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:24:40,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-26 03:24:42,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:24:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:24:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-26 03:24:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:24:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:44,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539452741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:44,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:24:44,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 96 [2021-08-26 03:24:44,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294994184] [2021-08-26 03:24:44,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-08-26 03:24:44,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:24:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-08-26 03:24:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=8794, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 03:24:44,824 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 96 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 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) [2021-08-26 03:24:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:24:47,323 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-08-26 03:24:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-26 03:24:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 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 98 [2021-08-26 03:24:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:24:47,324 INFO L225 Difference]: With dead ends: 106 [2021-08-26 03:24:47,324 INFO L226 Difference]: Without dead ends: 102 [2021-08-26 03:24:47,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 3214.0ms TimeCoverageRelationStatistics Valid=326, Invalid=8794, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 03:24:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-26 03:24:47,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-08-26 03:24:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 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) [2021-08-26 03:24:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-08-26 03:24:47,327 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-08-26 03:24:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:24:47,327 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-08-26 03:24:47,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 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) [2021-08-26 03:24:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-08-26 03:24:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-26 03:24:47,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:24:47,328 INFO L512 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2021-08-26 03:24:47,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-26 03:24:47,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:24:47,535 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:24:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:24:47,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1529946142, now seen corresponding path program 47 times [2021-08-26 03:24:47,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:24:47,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755493525] [2021-08-26 03:24:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:24:47,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:24:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:24:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:24:48,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:24:48,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755493525] [2021-08-26 03:24:48,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755493525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:24:48,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748433192] [2021-08-26 03:24:48,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:24:48,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:24:48,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:24:48,696 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:24:48,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-26 03:30:00,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-08-26 03:30:00,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:30:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 97 conjunts are in the unsatisfiable core [2021-08-26 03:30:00,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:30:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:30:01,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748433192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:30:01,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:30:01,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-08-26 03:30:01,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365193598] [2021-08-26 03:30:01,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-26 03:30:01,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:30:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-26 03:30:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 03:30:01,219 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 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) [2021-08-26 03:30:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:30:03,003 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-08-26 03:30:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-26 03:30:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 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 100 [2021-08-26 03:30:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:30:03,006 INFO L225 Difference]: With dead ends: 108 [2021-08-26 03:30:03,006 INFO L226 Difference]: Without dead ends: 104 [2021-08-26 03:30:03,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 03:30:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-26 03:30:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-08-26 03:30:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 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) [2021-08-26 03:30:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-08-26 03:30:03,009 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-08-26 03:30:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:30:03,009 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-08-26 03:30:03,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 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) [2021-08-26 03:30:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-08-26 03:30:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-26 03:30:03,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:30:03,009 INFO L512 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2021-08-26 03:30:03,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-26 03:30:03,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-26 03:30:03,210 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:30:03,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:30:03,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1449769985, now seen corresponding path program 48 times [2021-08-26 03:30:03,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:30:03,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740371108] [2021-08-26 03:30:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:30:03,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:30:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:30:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:30:04,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:30:04,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740371108] [2021-08-26 03:30:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740371108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:30:04,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774435070] [2021-08-26 03:30:04,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:30:04,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:30:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:30:04,509 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:30:04,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-26 03:30:12,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-08-26 03:30:12,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:30:12,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 105 conjunts are in the unsatisfiable core [2021-08-26 03:30:12,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:30:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:30:14,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774435070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:30:14,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:30:14,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2021-08-26 03:30:14,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065142624] [2021-08-26 03:30:14,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-26 03:30:14,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:30:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-26 03:30:14,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=5454, Unknown=0, NotChecked=0, Total=5700 [2021-08-26 03:30:14,171 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 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) [2021-08-26 03:30:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:30:16,716 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-08-26 03:30:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-26 03:30:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 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 102 [2021-08-26 03:30:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:30:16,717 INFO L225 Difference]: With dead ends: 110 [2021-08-26 03:30:16,717 INFO L226 Difference]: Without dead ends: 106 [2021-08-26 03:30:16,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2346.6ms TimeCoverageRelationStatistics Valid=246, Invalid=5454, Unknown=0, NotChecked=0, Total=5700 [2021-08-26 03:30:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-26 03:30:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-08-26 03:30:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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) [2021-08-26 03:30:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-08-26 03:30:16,720 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-08-26 03:30:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:30:16,720 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-08-26 03:30:16,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 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) [2021-08-26 03:30:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-08-26 03:30:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-26 03:30:16,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:30:16,721 INFO L512 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2021-08-26 03:30:16,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-26 03:30:16,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:30:16,933 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:30:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:30:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1709894436, now seen corresponding path program 49 times [2021-08-26 03:30:16,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:30:16,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20684869] [2021-08-26 03:30:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:30:16,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:30:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:30:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:30:18,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:30:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20684869] [2021-08-26 03:30:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20684869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:30:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450363204] [2021-08-26 03:30:18,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:30:18,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:30:18,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:30:18,184 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:30:18,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-26 03:30:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:30:20,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 104 conjunts are in the unsatisfiable core [2021-08-26 03:30:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:30:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:30:23,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450363204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:30:23,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:30:23,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53] total 102 [2021-08-26 03:30:23,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69721699] [2021-08-26 03:30:23,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-08-26 03:30:23,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:30:23,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-08-26 03:30:23,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=9955, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 03:30:23,494 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 102 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 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) [2021-08-26 03:30:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:30:26,184 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-08-26 03:30:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 03:30:26,185 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 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 104 [2021-08-26 03:30:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:30:26,185 INFO L225 Difference]: With dead ends: 112 [2021-08-26 03:30:26,185 INFO L226 Difference]: Without dead ends: 108 [2021-08-26 03:30:26,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 3703.5ms TimeCoverageRelationStatistics Valid=347, Invalid=9955, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 03:30:26,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-26 03:30:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-08-26 03:30:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 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) [2021-08-26 03:30:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-08-26 03:30:26,188 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-08-26 03:30:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:30:26,188 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-08-26 03:30:26,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 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) [2021-08-26 03:30:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-08-26 03:30:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-26 03:30:26,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:30:26,189 INFO L512 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-08-26 03:30:26,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-26 03:30:26,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-26 03:30:26,405 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:30:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:30:26,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1713578617, now seen corresponding path program 50 times [2021-08-26 03:30:26,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:30:26,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111667463] [2021-08-26 03:30:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:30:26,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:30:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:30:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2021-08-26 03:30:26,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:30:26,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111667463] [2021-08-26 03:30:26,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111667463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:30:26,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668220296] [2021-08-26 03:30:26,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:30:26,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:30:26,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:30:26,908 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:30:26,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-26 03:30:29,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:30:29,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:30:29,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-26 03:30:29,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:30:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:30:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668220296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:30:31,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:30:31,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 54] total 57 [2021-08-26 03:30:31,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106846777] [2021-08-26 03:30:31,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-26 03:30:31,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:30:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-26 03:30:31,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2979, Unknown=0, NotChecked=0, Total=3192 [2021-08-26 03:30:31,067 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 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) [2021-08-26 03:30:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:30:33,049 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2021-08-26 03:30:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 03:30:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 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 106 [2021-08-26 03:30:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:30:33,050 INFO L225 Difference]: With dead ends: 111 [2021-08-26 03:30:33,050 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:30:33,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 48 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1581.9ms TimeCoverageRelationStatistics Valid=220, Invalid=3086, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 03:30:33,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:30:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:30:33,050 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) [2021-08-26 03:30:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:30:33,051 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2021-08-26 03:30:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:30:33,051 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:30:33,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 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) [2021-08-26 03:30:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:30:33,051 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:30:33,053 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:30:33,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-26 03:30:33,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-26 03:30:33,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:30:33,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:30:33,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:30:33,948 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:30:33,948 INFO L857 garLoopResultBuilder]: For program point L17-2(lines 17 23) no Hoare annotation was computed. [2021-08-26 03:30:33,948 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-08-26 03:30:33,948 INFO L860 garLoopResultBuilder]: At program point L7-2(lines 1 26) the Hoare annotation is: true [2021-08-26 03:30:33,948 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:30:33,948 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:30:33,948 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:30:33,948 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-08-26 03:30:33,949 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 22) no Hoare annotation was computed. [2021-08-26 03:30:33,949 INFO L853 garLoopResultBuilder]: At program point L18-2(lines 17 23) the Hoare annotation is: (let ((.cse0 (mod ULTIMATE.start_main_~y~0 2))) (or (and (<= ULTIMATE.start_main_~x~0 40) (<= 40 ULTIMATE.start_main_~x~0)) (= ULTIMATE.start_main_~x~0 0) (and (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 90)) (and (<= ULTIMATE.start_main_~x~0 62) (<= 62 ULTIMATE.start_main_~x~0)) (and (<= 68 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 68)) (and (not (= .cse0 0)) (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 99)) (= ULTIMATE.start_main_~x~0 54) (and (<= ULTIMATE.start_main_~x~0 72) (<= 72 ULTIMATE.start_main_~x~0)) (= ULTIMATE.start_main_~x~0 70) (= ULTIMATE.start_main_~x~0 50) (and (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (= ULTIMATE.start_main_~x~0 8) (= ULTIMATE.start_main_~x~0 94) (and (<= ULTIMATE.start_main_~x~0 92) (<= 92 ULTIMATE.start_main_~x~0)) (= ULTIMATE.start_main_~x~0 82) (= ULTIMATE.start_main_~x~0 4) (and (<= ULTIMATE.start_main_~x~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (<= 78 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 78)) (= ULTIMATE.start_main_~x~0 20) (= ULTIMATE.start_main_~x~0 26) (and (= ULTIMATE.start_main_~x~0 100) (<= .cse0 0)) (= ULTIMATE.start_main_~x~0 80) (and (<= 88 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 88)) (= ULTIMATE.start_main_~x~0 86) (and (<= ULTIMATE.start_main_~x~0 36) (<= 36 ULTIMATE.start_main_~x~0)) (= ULTIMATE.start_main_~x~0 2) (= ULTIMATE.start_main_~x~0 30) (= ULTIMATE.start_main_~x~0 96) (= 56 ULTIMATE.start_main_~x~0) (and (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 52)) (= ULTIMATE.start_main_~x~0 18) (= ULTIMATE.start_main_~x~0 46) (= ULTIMATE.start_main_~x~0 14) (= 66 ULTIMATE.start_main_~x~0) (and (<= 44 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 44)) (= ULTIMATE.start_main_~x~0 38) (= ULTIMATE.start_main_~x~0 10) (and (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~x~0)) (and (<= 6 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 6)) (= ULTIMATE.start_main_~x~0 42) (= ULTIMATE.start_main_~x~0 64) (= ULTIMATE.start_main_~x~0 22) (= ULTIMATE.start_main_~x~0 12) (= ULTIMATE.start_main_~x~0 24) (= ULTIMATE.start_main_~x~0 32) (= ULTIMATE.start_main_~x~0 28) (= ULTIMATE.start_main_~x~0 48) (= ULTIMATE.start_main_~x~0 74) (= ULTIMATE.start_main_~x~0 98) (= ULTIMATE.start_main_~x~0 58) (and (<= 34 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 34)) (= ULTIMATE.start_main_~x~0 16))) [2021-08-26 03:30:33,949 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-08-26 03:30:33,951 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:30:33,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:30:33 BoogieIcfgContainer [2021-08-26 03:30:33,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:30:33,963 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:30:33,963 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:30:33,963 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:30:33,964 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:20:16" (3/4) ... [2021-08-26 03:30:33,966 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:30:33,973 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-26 03:30:33,973 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:30:33,973 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:30:33,973 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:30:33,990 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:30:33,991 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:30:33,992 INFO L168 Benchmark]: Toolchain (without parser) took 618113.54 ms. Allocated memory was 52.4 MB in the beginning and 524.3 MB in the end (delta: 471.9 MB). Free memory was 29.6 MB in the beginning and 364.9 MB in the end (delta: -335.3 MB). Peak memory consumption was 135.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:30:33,992 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 52.4 MB. Free memory was 34.2 MB in the beginning and 34.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:30:33,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.25 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 29.5 MB in the beginning and 51.3 MB in the end (delta: -21.8 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-08-26 03:30:33,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.22 ms. Allocated memory is still 67.1 MB. Free memory was 51.1 MB in the beginning and 49.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:30:33,993 INFO L168 Benchmark]: Boogie Preprocessor took 37.67 ms. Allocated memory is still 67.1 MB. Free memory was 49.7 MB in the beginning and 48.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:30:33,993 INFO L168 Benchmark]: RCFGBuilder took 248.23 ms. Allocated memory is still 67.1 MB. Free memory was 48.6 MB in the beginning and 37.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:30:33,993 INFO L168 Benchmark]: TraceAbstraction took 617569.61 ms. Allocated memory was 67.1 MB in the beginning and 524.3 MB in the end (delta: 457.2 MB). Free memory was 36.9 MB in the beginning and 367.0 MB in the end (delta: -330.1 MB). Peak memory consumption was 376.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:30:33,993 INFO L168 Benchmark]: Witness Printer took 27.69 ms. Allocated memory is still 524.3 MB. Free memory was 367.0 MB in the beginning and 364.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:30:33,994 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 52.4 MB. Free memory was 34.2 MB in the beginning and 34.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 186.25 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 29.5 MB in the beginning and 51.3 MB in the end (delta: -21.8 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.22 ms. Allocated memory is still 67.1 MB. Free memory was 51.1 MB in the beginning and 49.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.67 ms. Allocated memory is still 67.1 MB. Free memory was 49.7 MB in the beginning and 48.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 248.23 ms. Allocated memory is still 67.1 MB. Free memory was 48.6 MB in the beginning and 37.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 617569.61 ms. Allocated memory was 67.1 MB in the beginning and 524.3 MB in the end (delta: 457.2 MB). Free memory was 36.9 MB in the beginning and 367.0 MB in the end (delta: -330.1 MB). Peak memory consumption was 376.6 MB. Max. memory is 16.1 GB. * Witness Printer took 27.69 ms. Allocated memory is still 524.3 MB. Free memory was 367.0 MB in the beginning and 364.9 MB in the end (delta: 2.1 MB). There was no memory consumed. 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: 8]: 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, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 617518.6ms, OverallIterations: 55, TraceHistogramMax: 50, EmptinessCheckTime: 25.8ms, AutomataDifference: 41628.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 674.9ms, InitialAbstractionConstructionTime: 6.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 330 SDtfs, 1363 SDslu, 2778 SDs, 0 SdLazy, 110814 SolverSat, 1238 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31430.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4329 GetRequests, 2378 SyntacticMatches, 84 SemanticMatches, 1867 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7844 ImplicationChecksByTransitivity, 39612.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=54, InterpolantAutomatonStates: 1449, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 150.7ms AutomataMinimizationTime, 55 MinimizatonAttempts, 51 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 57 NumberOfFragments, 239 HoareAnnotationTreeSize, 2 FomulaSimplifications, 80 FormulaSimplificationTreeSizeReduction, 88.1ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 524 FormulaSimplificationTreeSizeReductionInter, 580.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 310.6ms SsaConstructionTime, 463937.9ms SatisfiabilityAnalysisTime, 61958.1ms InterpolantComputationTime, 5772 NumberOfCodeBlocks, 5554 NumberOfCodeBlocksAsserted, 736 NumberOfCheckSat, 5664 ConstructedInterpolants, 0 QuantifiedInterpolants, 41481 SizeOfPredicates, 106 NumberOfNonLiveVariables, 8234 ConjunctsInSsa, 2839 ConjunctsInUnsatCore, 108 InterpolantComputations, 3 PerfectInterpolantSequences, 2361/85878 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: 17]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((x <= 40 && 40 <= x) || x == 0) || (90 <= x && x <= 90)) || (x <= 62 && 62 <= x)) || (68 <= x && x <= 68)) || (!(y % 2 == 0) && (x + 4294967295) % 4294967296 < 99)) || x == 54) || (x <= 72 && 72 <= x)) || x == 70) || x == 50) || (x <= 76 && 76 <= x)) || x == 8) || x == 94) || (x <= 92 && 92 <= x)) || x == 82) || x == 4) || (x <= 60 && 60 <= x)) || (78 <= x && x <= 78)) || x == 20) || x == 26) || (x == 100 && y % 2 <= 0)) || x == 80) || (88 <= x && x <= 88)) || x == 86) || (x <= 36 && 36 <= x)) || x == 2) || x == 30) || x == 96) || 56 == x) || (52 <= x && x <= 52)) || x == 18) || x == 46) || x == 14) || 66 == x) || (44 <= x && x <= 44)) || x == 38) || x == 10) || (x <= 84 && 84 <= x)) || (6 <= x && x <= 6)) || x == 42) || x == 64) || x == 22) || x == 12) || x == 24) || x == 32) || x == 28) || x == 48) || x == 74) || x == 98) || x == 58) || (34 <= x && x <= 34)) || x == 16 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 03:30:34,015 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...