./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/array-examples/standard_copy6_ground-1.i -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 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:30:35,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:30:35,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:30:35,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:30:35,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:30:35,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:30:35,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:30:35,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:30:35,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:30:35,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:30:35,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:30:35,961 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:30:35,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:30:35,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:30:35,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:30:35,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:30:35,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:30:35,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:30:35,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:30:35,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:30:35,975 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:30:35,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:30:35,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:30:35,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:30:35,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:30:35,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:30:35,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:30:35,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:30:35,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:30:35,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:30:35,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:30:35,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:30:35,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:30:35,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:30:35,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:30:35,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:30:35,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:30:35,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:30:35,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:30:35,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:30:35,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:30:35,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:30:35,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:30:36,016 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:30:36,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:30:36,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:30:36,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:30:36,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:30:36,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:30:36,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:30:36,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:30:36,019 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:30:36,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:30:36,020 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:30:36,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:30:36,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:30:36,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:30:36,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:30:36,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:30:36,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:30:36,021 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:30:36,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:30:36,022 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:30:36,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:30:36,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:30:36,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:30:36,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:30:36,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:30:36,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:30:36,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:30:36,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:30:36,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:30:36,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:30:36,024 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:30:36,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:30:36,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:30:36,024 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e07c08b08b04587ccec5205fe357151301abec81845a5f3a121e5979e6bfacf [2022-07-20 20:30:36,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:30:36,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:30:36,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:30:36,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:30:36,251 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:30:36,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2022-07-20 20:30:36,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1869b6c82/bbba120a5a57494283b7b90f2d072bb4/FLAG3b10852f8 [2022-07-20 20:30:36,788 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:30:36,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-1.i [2022-07-20 20:30:36,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1869b6c82/bbba120a5a57494283b7b90f2d072bb4/FLAG3b10852f8 [2022-07-20 20:30:36,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1869b6c82/bbba120a5a57494283b7b90f2d072bb4 [2022-07-20 20:30:36,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:30:36,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:30:36,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:30:36,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:30:36,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:30:36,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:36,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5febabaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36, skipping insertion in model container [2022-07-20 20:30:36,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:36,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:30:36,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:30:36,940 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/array-examples/standard_copy6_ground-1.i[816,829] [2022-07-20 20:30:36,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:30:36,970 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:30:36,980 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/array-examples/standard_copy6_ground-1.i[816,829] [2022-07-20 20:30:36,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:30:36,999 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:30:37,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36 WrapperNode [2022-07-20 20:30:37,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:30:37,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:30:37,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:30:37,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:30:37,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,027 INFO L137 Inliner]: procedures = 16, calls = 44, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 147 [2022-07-20 20:30:37,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:30:37,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:30:37,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:30:37,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:30:37,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:30:37,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:30:37,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:30:37,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:30:37,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (1/1) ... [2022-07-20 20:30:37,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:30:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:37,072 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) [2022-07-20 20:30:37,077 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 [2022-07-20 20:30:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:30:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:30:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:30:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:30:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:30:37,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:30:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:30:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:30:37,199 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:30:37,201 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:30:37,365 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:30:37,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:30:37,370 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-20 20:30:37,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:30:37 BoogieIcfgContainer [2022-07-20 20:30:37,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:30:37,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:30:37,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:30:37,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:30:37,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:30:36" (1/3) ... [2022-07-20 20:30:37,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444aeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:30:37, skipping insertion in model container [2022-07-20 20:30:37,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:30:36" (2/3) ... [2022-07-20 20:30:37,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444aeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:30:37, skipping insertion in model container [2022-07-20 20:30:37,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:30:37" (3/3) ... [2022-07-20 20:30:37,378 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2022-07-20 20:30:37,388 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:30:37,389 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:30:37,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:30:37,452 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@c842cc8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@71a14191 [2022-07-20 20:30:37,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:30:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 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) [2022-07-20 20:30:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-20 20:30:37,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:37,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:37,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash -962610817, now seen corresponding path program 1 times [2022-07-20 20:30:37,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:37,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687882330] [2022-07-20 20:30:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:37,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:30:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:37,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687882330] [2022-07-20 20:30:37,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687882330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:30:37,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:30:37,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:30:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407143793] [2022-07-20 20:30:37,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:30:37,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:30:37,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:30:37,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:30:37,715 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 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) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:37,750 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2022-07-20 20:30:37,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:30:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-20 20:30:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:37,760 INFO L225 Difference]: With dead ends: 64 [2022-07-20 20:30:37,760 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 20:30:37,768 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 [2022-07-20 20:30:37,773 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:37,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:30:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 20:30:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-07-20 20:30:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-07-20 20:30:37,820 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-07-20 20:30:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:37,820 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-07-20 20:30:37,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-07-20 20:30:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 20:30:37,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:37,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:37,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:30:37,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1385693007, now seen corresponding path program 1 times [2022-07-20 20:30:37,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:37,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460894933] [2022-07-20 20:30:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:37,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:30:37,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:37,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460894933] [2022-07-20 20:30:37,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460894933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:37,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000221404] [2022-07-20 20:30:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:37,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:37,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:37,928 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) [2022-07-20 20:30:37,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:30:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:38,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 20:30:38,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:30:38,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 20:30:38,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000221404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:30:38,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 20:30:38,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-20 20:30:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031531470] [2022-07-20 20:30:38,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:30:38,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:30:38,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:30:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:30:38,079 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:38,136 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2022-07-20 20:30:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:30:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 20:30:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:38,140 INFO L225 Difference]: With dead ends: 64 [2022-07-20 20:30:38,141 INFO L226 Difference]: Without dead ends: 42 [2022-07-20 20:30:38,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:30:38,143 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:38,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:30:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-20 20:30:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-07-20 20:30:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-07-20 20:30:38,152 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2022-07-20 20:30:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:38,153 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-07-20 20:30:38,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-07-20 20:30:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 20:30:38,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:38,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:38,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 20:30:38,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:38,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1933824923, now seen corresponding path program 1 times [2022-07-20 20:30:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:38,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519400464] [2022-07-20 20:30:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:38,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 20:30:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:38,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519400464] [2022-07-20 20:30:38,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519400464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:38,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044378874] [2022-07-20 20:30:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:38,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:38,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:38,441 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) [2022-07-20 20:30:38,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:30:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:38,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:30:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 20:30:38,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:30:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 20:30:38,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044378874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:30:38,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:30:38,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:30:38,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460211125] [2022-07-20 20:30:38,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:30:38,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:30:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:38,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:30:38,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:30:38,605 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:38,632 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-07-20 20:30:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:30:38,632 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 33 [2022-07-20 20:30:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:38,633 INFO L225 Difference]: With dead ends: 73 [2022-07-20 20:30:38,633 INFO L226 Difference]: Without dead ends: 42 [2022-07-20 20:30:38,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:30:38,634 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:38,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 98 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:30:38,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-20 20:30:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-20 20:30:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 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) [2022-07-20 20:30:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-07-20 20:30:38,640 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 33 [2022-07-20 20:30:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:38,641 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-07-20 20:30:38,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-07-20 20:30:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 20:30:38,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:38,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:38,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-20 20:30:38,862 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,SelfDestructingSolverStorable2 [2022-07-20 20:30:38,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:38,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1087832161, now seen corresponding path program 2 times [2022-07-20 20:30:38,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:38,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234554963] [2022-07-20 20:30:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:38,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 20:30:38,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:38,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234554963] [2022-07-20 20:30:38,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234554963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:38,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390452606] [2022-07-20 20:30:38,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:30:38,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:38,967 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) [2022-07-20 20:30:38,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:30:39,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:30:39,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:30:39,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:30:39,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 20:30:39,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:30:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-20 20:30:39,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390452606] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:30:39,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:30:39,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:30:39,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886176961] [2022-07-20 20:30:39,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:30:39,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:30:39,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:39,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:30:39,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:30:39,124 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:39,211 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2022-07-20 20:30:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:30:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-20 20:30:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:39,212 INFO L225 Difference]: With dead ends: 105 [2022-07-20 20:30:39,213 INFO L226 Difference]: Without dead ends: 78 [2022-07-20 20:30:39,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:30:39,214 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:39,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 57 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:30:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-20 20:30:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-20 20:30:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.103896103896104) internal successors, (85), 77 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2022-07-20 20:30:39,220 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 39 [2022-07-20 20:30:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:39,220 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2022-07-20 20:30:39,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2022-07-20 20:30:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 20:30:39,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:39,222 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:39,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 20:30:39,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:39,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1517340229, now seen corresponding path program 3 times [2022-07-20 20:30:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:39,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963747715] [2022-07-20 20:30:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:39,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-20 20:30:39,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963747715] [2022-07-20 20:30:39,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963747715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:39,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067509573] [2022-07-20 20:30:39,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:30:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:39,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:39,638 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) [2022-07-20 20:30:39,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:30:40,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 20:30:40,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:30:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:30:40,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-20 20:30:40,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:30:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-20 20:30:40,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067509573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:30:40,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:30:40,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-07-20 20:30:40,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496054612] [2022-07-20 20:30:40,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:30:40,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 20:30:40,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:40,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 20:30:40,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-20 20:30:40,690 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:40,935 INFO L93 Difference]: Finished difference Result 220 states and 270 transitions. [2022-07-20 20:30:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 20:30:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-20 20:30:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:40,937 INFO L225 Difference]: With dead ends: 220 [2022-07-20 20:30:40,937 INFO L226 Difference]: Without dead ends: 153 [2022-07-20 20:30:40,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-20 20:30:40,938 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:40,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 80 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:30:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-20 20:30:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-07-20 20:30:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0529801324503312) internal successors, (159), 151 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 159 transitions. [2022-07-20 20:30:40,947 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 159 transitions. Word has length 75 [2022-07-20 20:30:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:40,947 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 159 transitions. [2022-07-20 20:30:40,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 159 transitions. [2022-07-20 20:30:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 20:30:40,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:40,949 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:40,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 20:30:41,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:41,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1455381425, now seen corresponding path program 4 times [2022-07-20 20:30:41,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:41,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892452857] [2022-07-20 20:30:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:41,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-07-20 20:30:41,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892452857] [2022-07-20 20:30:41,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892452857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:41,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885862612] [2022-07-20 20:30:41,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:30:41,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:41,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:41,315 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) [2022-07-20 20:30:41,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:30:41,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:30:41,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:30:41,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 20:30:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-07-20 20:30:41,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:30:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-07-20 20:30:41,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885862612] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:30:41,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:30:41,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-20 20:30:41,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830381265] [2022-07-20 20:30:41,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:30:41,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 20:30:41,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:41,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 20:30:41,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-07-20 20:30:41,626 INFO L87 Difference]: Start difference. First operand 152 states and 159 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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) [2022-07-20 20:30:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:41,657 INFO L93 Difference]: Finished difference Result 305 states and 325 transitions. [2022-07-20 20:30:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 20:30:41,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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 149 [2022-07-20 20:30:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:41,658 INFO L225 Difference]: With dead ends: 305 [2022-07-20 20:30:41,658 INFO L226 Difference]: Without dead ends: 166 [2022-07-20 20:30:41,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-07-20 20:30:41,660 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 18 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:41,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 162 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:30:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-20 20:30:41,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-07-20 20:30:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0484848484848486) internal successors, (173), 165 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 173 transitions. [2022-07-20 20:30:41,668 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 173 transitions. Word has length 149 [2022-07-20 20:30:41,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:41,669 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 173 transitions. [2022-07-20 20:30:41,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 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) [2022-07-20 20:30:41,669 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 173 transitions. [2022-07-20 20:30:41,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-20 20:30:41,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:41,671 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:41,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:30:41,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:41,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:41,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:41,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2023772189, now seen corresponding path program 5 times [2022-07-20 20:30:41,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:41,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622792518] [2022-07-20 20:30:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:41,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-07-20 20:30:42,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:42,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622792518] [2022-07-20 20:30:42,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622792518] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:42,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709452489] [2022-07-20 20:30:42,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:30:42,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:42,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:42,080 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) [2022-07-20 20:30:42,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process