./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-invariants/linear-inequality-inv-a.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 e6ceef81d5d5c6ec4b435ae3bf6300a70928e11f3a8c1d376463323495e50f12 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:36:17,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:36:17,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:36:17,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:36:17,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:36:17,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:36:17,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:36:17,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:36:17,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:36:17,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:36:17,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:36:17,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:36:17,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:36:17,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:36:17,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:36:17,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:36:17,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:36:17,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:36:17,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:36:17,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:36:17,954 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:36:17,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:36:17,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:36:17,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:36:17,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:36:17,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:36:17,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:36:17,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:36:17,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:36:17,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:36:17,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:36:17,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:36:17,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:36:17,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:36:17,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:36:17,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:36:17,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:36:17,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:36:17,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:36:17,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:36:17,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:36:17,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:36:17,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:36:17,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:36:18,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:36:18,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:36:18,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:36:18,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:36:18,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:36:18,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:36:18,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:36:18,002 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:36:18,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:36:18,003 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:36:18,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:36:18,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:36:18,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:36:18,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:36:18,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:36:18,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:36:18,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:36:18,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:36:18,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:36:18,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:36:18,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:36:18,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:36:18,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:36:18,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:36:18,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:36:18,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:36:18,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:36:18,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:36:18,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:36:18,007 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:36:18,007 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:36:18,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:36:18,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6ceef81d5d5c6ec4b435ae3bf6300a70928e11f3a8c1d376463323495e50f12 [2022-07-22 15:36:18,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:36:18,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:36:18,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:36:18,247 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:36:18,247 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:36:18,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2022-07-22 15:36:18,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6a1258b/b49cbbd215134167a275d1965289924a/FLAGe0f615772 [2022-07-22 15:36:18,678 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:36:18,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2022-07-22 15:36:18,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6a1258b/b49cbbd215134167a275d1965289924a/FLAGe0f615772 [2022-07-22 15:36:18,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c6a1258b/b49cbbd215134167a275d1965289924a [2022-07-22 15:36:18,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:36:18,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:36:18,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:36:18,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:36:18,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:36:18,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9d45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18, skipping insertion in model container [2022-07-22 15:36:18,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:36:18,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:36:18,867 WARN L230 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-invariants/linear-inequality-inv-a.c[557,570] [2022-07-22 15:36:18,873 WARN L230 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-invariants/linear-inequality-inv-a.c[613,626] [2022-07-22 15:36:18,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:36:18,882 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:36:18,893 WARN L230 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-invariants/linear-inequality-inv-a.c[557,570] [2022-07-22 15:36:18,894 WARN L230 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-invariants/linear-inequality-inv-a.c[613,626] [2022-07-22 15:36:18,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:36:18,904 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:36:18,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18 WrapperNode [2022-07-22 15:36:18,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:36:18,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:36:18,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:36:18,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:36:18,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,930 INFO L137 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2022-07-22 15:36:18,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:36:18,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:36:18,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:36:18,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:36:18,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:36:18,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:36:18,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:36:18,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:36:18,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (1/1) ... [2022-07-22 15:36:18,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:36:18,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:19,034 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) [2022-07-22 15:36:19,038 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 [2022-07-22 15:36:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:36:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:36:19,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:36:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:36:19,105 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:36:19,106 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:36:19,171 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:36:19,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:36:19,175 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 15:36:19,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:36:19 BoogieIcfgContainer [2022-07-22 15:36:19,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:36:19,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:36:19,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:36:19,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:36:19,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:36:18" (1/3) ... [2022-07-22 15:36:19,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19dfa4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:36:19, skipping insertion in model container [2022-07-22 15:36:19,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:36:18" (2/3) ... [2022-07-22 15:36:19,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19dfa4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:36:19, skipping insertion in model container [2022-07-22 15:36:19,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:36:19" (3/3) ... [2022-07-22 15:36:19,181 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2022-07-22 15:36:19,189 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:36:19,190 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-22 15:36:19,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:36:19,222 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62f6f540, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6db71580 [2022-07-22 15:36:19,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 15:36:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 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) [2022-07-22 15:36:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 15:36:19,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:19,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 15:36:19,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:19,234 INFO L85 PathProgramCache]: Analyzing trace with hash 889577263, now seen corresponding path program 1 times [2022-07-22 15:36:19,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:19,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297674592] [2022-07-22 15:36:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:19,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:19,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:19,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297674592] [2022-07-22 15:36:19,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297674592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:19,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:36:19,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:36:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47650465] [2022-07-22 15:36:19,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:19,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:36:19,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:36:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:36:19,371 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 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) 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) [2022-07-22 15:36:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:19,379 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2022-07-22 15:36:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:36:19,380 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 [2022-07-22 15:36:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:19,384 INFO L225 Difference]: With dead ends: 22 [2022-07-22 15:36:19,384 INFO L226 Difference]: Without dead ends: 10 [2022-07-22 15:36:19,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:36:19,391 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:19,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:19,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-22 15:36:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-22 15:36:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 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) [2022-07-22 15:36:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-07-22 15:36:19,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2022-07-22 15:36:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:19,411 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-07-22 15:36:19,411 INFO L496 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) [2022-07-22 15:36:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-07-22 15:36:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-22 15:36:19,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:19,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-22 15:36:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:36:19,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash 889573419, now seen corresponding path program 1 times [2022-07-22 15:36:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:19,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744899389] [2022-07-22 15:36:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:19,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744899389] [2022-07-22 15:36:19,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744899389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:36:19,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:36:19,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:36:19,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909070462] [2022-07-22 15:36:19,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:36:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 15:36:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 15:36:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:36:19,485 INFO L87 Difference]: Start difference. First operand 10 states and 10 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) [2022-07-22 15:36:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:19,492 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-07-22 15:36:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 15:36:19,493 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 [2022-07-22 15:36:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:19,493 INFO L225 Difference]: With dead ends: 17 [2022-07-22 15:36:19,493 INFO L226 Difference]: Without dead ends: 11 [2022-07-22 15:36:19,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:36:19,494 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:19,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-22 15:36:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-22 15:36:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-07-22 15:36:19,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2022-07-22 15:36:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:19,497 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-07-22 15:36:19,497 INFO L496 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) [2022-07-22 15:36:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-07-22 15:36:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 15:36:19,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:19,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:19,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:36:19,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:19,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1807024099, now seen corresponding path program 1 times [2022-07-22 15:36:19,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:19,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409065686] [2022-07-22 15:36:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:19,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:19,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:19,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409065686] [2022-07-22 15:36:19,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409065686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:19,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368095325] [2022-07-22 15:36:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:19,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:19,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:19,550 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) [2022-07-22 15:36:19,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:36:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:36:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:19,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:19,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368095325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:19,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:19,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 15:36:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81068900] [2022-07-22 15:36:19,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:19,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:36:19,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:36:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:36:19,693 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-07-22 15:36:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:19,757 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-22 15:36:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 15:36:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) Word has length 7 [2022-07-22 15:36:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:19,758 INFO L225 Difference]: With dead ends: 28 [2022-07-22 15:36:19,758 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 15:36:19,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:36:19,760 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:19,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:36:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 15:36:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-07-22 15:36:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) 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) [2022-07-22 15:36:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-22 15:36:19,764 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 7 [2022-07-22 15:36:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:19,765 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-22 15:36:19,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-07-22 15:36:19,765 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-22 15:36:19,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 15:36:19,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:19,766 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:19,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:19,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:19,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:19,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:19,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1384984081, now seen corresponding path program 1 times [2022-07-22 15:36:19,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:19,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612958618] [2022-07-22 15:36:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:19,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:20,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:20,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612958618] [2022-07-22 15:36:20,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612958618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:20,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97668598] [2022-07-22 15:36:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:20,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:20,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:20,134 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) [2022-07-22 15:36:20,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:36:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:20,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:36:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:20,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:20,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97668598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:20,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:20,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-22 15:36:20,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785335109] [2022-07-22 15:36:20,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:20,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 15:36:20,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 15:36:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:36:20,379 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-07-22 15:36:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:20,465 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-07-22 15:36:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 15:36:20,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) Word has length 9 [2022-07-22 15:36:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:20,465 INFO L225 Difference]: With dead ends: 26 [2022-07-22 15:36:20,466 INFO L226 Difference]: Without dead ends: 18 [2022-07-22 15:36:20,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:36:20,467 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:20,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 17 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:36:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-22 15:36:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-07-22 15:36:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 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) [2022-07-22 15:36:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-22 15:36:20,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 9 [2022-07-22 15:36:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:20,471 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-22 15:36:20,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-07-22 15:36:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-22 15:36:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 15:36:20,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:20,472 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:20,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:20,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 15:36:20,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash -13631957, now seen corresponding path program 2 times [2022-07-22 15:36:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:20,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402104119] [2022-07-22 15:36:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:20,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:20,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:20,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402104119] [2022-07-22 15:36:20,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402104119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:20,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661816508] [2022-07-22 15:36:20,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:36:20,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:20,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:20,825 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) [2022-07-22 15:36:20,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:36:20,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:36:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:20,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 15:36:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:21,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:21,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661816508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:21,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:21,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-22 15:36:21,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125491436] [2022-07-22 15:36:21,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:21,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 15:36:21,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:21,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 15:36:21,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-07-22 15:36:21,213 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2022-07-22 15:36:21,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:21,398 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-07-22 15:36:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 15:36:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 10 [2022-07-22 15:36:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:21,399 INFO L225 Difference]: With dead ends: 40 [2022-07-22 15:36:21,399 INFO L226 Difference]: Without dead ends: 36 [2022-07-22 15:36:21,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2022-07-22 15:36:21,401 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:21,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 32 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:36:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-22 15:36:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2022-07-22 15:36:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 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) [2022-07-22 15:36:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-22 15:36:21,406 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2022-07-22 15:36:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:21,406 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-22 15:36:21,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2022-07-22 15:36:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-22 15:36:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:36:21,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:21,406 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:21,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:21,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:21,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1963737105, now seen corresponding path program 2 times [2022-07-22 15:36:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65021910] [2022-07-22 15:36:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:21,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:21,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65021910] [2022-07-22 15:36:21,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65021910] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:21,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831772144] [2022-07-22 15:36:21,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:36:21,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:21,754 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) [2022-07-22 15:36:21,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:36:21,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:36:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:36:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:21,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:22,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831772144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:22,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:22,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-22 15:36:22,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673220468] [2022-07-22 15:36:22,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:22,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 15:36:22,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:22,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 15:36:22,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:36:22,271 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2022-07-22 15:36:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:22,380 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-07-22 15:36:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 15:36:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 15:36:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:22,381 INFO L225 Difference]: With dead ends: 42 [2022-07-22 15:36:22,381 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 15:36:22,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:36:22,382 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:22,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 28 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:36:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 15:36:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-07-22 15:36:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 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) [2022-07-22 15:36:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-22 15:36:22,387 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2022-07-22 15:36:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:22,387 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-22 15:36:22,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2022-07-22 15:36:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-22 15:36:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 15:36:22,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:22,388 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:22,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:22,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:22,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1418863403, now seen corresponding path program 3 times [2022-07-22 15:36:22,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752330449] [2022-07-22 15:36:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:22,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:22,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752330449] [2022-07-22 15:36:22,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752330449] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479350153] [2022-07-22 15:36:22,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:36:22,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:22,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:22,745 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) [2022-07-22 15:36:22,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:36:22,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 15:36:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 15:36:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:23,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:23,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479350153] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:23,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:23,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-22 15:36:23,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419233364] [2022-07-22 15:36:23,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:23,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 15:36:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 15:36:23,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=350, Unknown=0, NotChecked=0, Total=600 [2022-07-22 15:36:23,623 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:24,193 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2022-07-22 15:36:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 15:36:24,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-07-22 15:36:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:24,194 INFO L225 Difference]: With dead ends: 70 [2022-07-22 15:36:24,194 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 15:36:24,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=750, Invalid=1230, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 15:36:24,196 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:24,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 41 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:36:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 15:36:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2022-07-22 15:36:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 32 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) [2022-07-22 15:36:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-22 15:36:24,202 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 16 [2022-07-22 15:36:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:24,202 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-22 15:36:24,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-22 15:36:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 15:36:24,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:24,202 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:24,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:24,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:24,407 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:24,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1090479121, now seen corresponding path program 3 times [2022-07-22 15:36:24,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:24,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653745796] [2022-07-22 15:36:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:24,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:24,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653745796] [2022-07-22 15:36:24,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653745796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270627605] [2022-07-22 15:36:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:36:24,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:24,645 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) [2022-07-22 15:36:24,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:36:24,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 15:36:24,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:24,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 15:36:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:24,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:26,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270627605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:26,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:26,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-07-22 15:36:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349847594] [2022-07-22 15:36:26,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:26,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 15:36:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 15:36:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-07-22 15:36:26,219 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 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) [2022-07-22 15:36:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:26,534 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2022-07-22 15:36:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 15:36:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 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) Word has length 21 [2022-07-22 15:36:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:26,537 INFO L225 Difference]: With dead ends: 74 [2022-07-22 15:36:26,537 INFO L226 Difference]: Without dead ends: 48 [2022-07-22 15:36:26,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 15 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-07-22 15:36:26,538 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:26,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 34 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-22 15:36:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-07-22 15:36:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 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) [2022-07-22 15:36:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-07-22 15:36:26,548 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 21 [2022-07-22 15:36:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:26,548 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-07-22 15:36:26,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 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) [2022-07-22 15:36:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-07-22 15:36:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 15:36:26,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:26,549 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:26,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 15:36:26,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:26,753 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash 559361323, now seen corresponding path program 4 times [2022-07-22 15:36:26,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:26,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885654227] [2022-07-22 15:36:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:26,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885654227] [2022-07-22 15:36:27,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885654227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:27,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570342828] [2022-07-22 15:36:27,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:36:27,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:27,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:27,104 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) [2022-07-22 15:36:27,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:36:27,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:36:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 15:36:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:27,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:29,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570342828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:29,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:29,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-22 15:36:29,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353370979] [2022-07-22 15:36:29,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:29,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 15:36:29,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 15:36:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1066, Invalid=1286, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 15:36:29,412 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:31,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:31,283 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2022-07-22 15:36:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-22 15:36:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2022-07-22 15:36:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:31,284 INFO L225 Difference]: With dead ends: 130 [2022-07-22 15:36:31,284 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 15:36:31,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 11 SyntacticMatches, 21 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3222, Invalid=5334, Unknown=0, NotChecked=0, Total=8556 [2022-07-22 15:36:31,287 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 219 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:31,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 71 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:36:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 15:36:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 57. [2022-07-22 15:36:31,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 56 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) [2022-07-22 15:36:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2022-07-22 15:36:31,302 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 28 [2022-07-22 15:36:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:31,302 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2022-07-22 15:36:31,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:36:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2022-07-22 15:36:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 15:36:31,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:31,303 INFO L195 NwaCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:31,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 15:36:31,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:31,520 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1924770833, now seen corresponding path program 4 times [2022-07-22 15:36:31,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:31,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533760961] [2022-07-22 15:36:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:32,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533760961] [2022-07-22 15:36:32,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533760961] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232892368] [2022-07-22 15:36:32,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:36:32,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:32,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:32,102 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) [2022-07-22 15:36:32,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:36:32,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:36:32,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:36:32,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 15:36:32,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:36:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:32,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:36:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:36,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232892368] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:36:36,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:36:36,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2022-07-22 15:36:36,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871488899] [2022-07-22 15:36:36,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:36:36,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-22 15:36:36,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:36:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-22 15:36:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 15:36:36,180 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 64 states, 64 states have (on average 1.109375) internal successors, (71), 64 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) [2022-07-22 15:36:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:36:36,808 INFO L93 Difference]: Finished difference Result 138 states and 185 transitions. [2022-07-22 15:36:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 15:36:36,808 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.109375) internal successors, (71), 64 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) Word has length 37 [2022-07-22 15:36:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:36:36,809 INFO L225 Difference]: With dead ends: 138 [2022-07-22 15:36:36,809 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 15:36:36,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 13 SyntacticMatches, 31 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 15:36:36,810 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 199 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:36:36,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 66 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 15:36:36,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 15:36:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2022-07-22 15:36:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 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) [2022-07-22 15:36:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-07-22 15:36:36,820 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 37 [2022-07-22 15:36:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:36:36,821 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-07-22 15:36:36,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.109375) internal successors, (71), 64 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) [2022-07-22 15:36:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-07-22 15:36:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 15:36:36,822 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:36:36,822 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2022-07-22 15:36:36,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 15:36:37,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 15:36:37,039 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:36:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:36:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash -39567061, now seen corresponding path program 5 times [2022-07-22 15:36:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:36:37,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243214989] [2022-07-22 15:36:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:36:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:36:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:36:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:36:38,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:36:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243214989] [2022-07-22 15:36:38,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243214989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:36:38,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58804766] [2022-07-22 15:36:38,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:36:38,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:36:38,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:36:38,106 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) [2022-07-22 15:36:38,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process