./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/parity.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/bitvector/parity.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 d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:20:47,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:20:47,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:20:48,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:20:48,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:20:48,020 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:20:48,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:20:48,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:20:48,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:20:48,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:20:48,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:20:48,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:20:48,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:20:48,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:20:48,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:20:48,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:20:48,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:20:48,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:20:48,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:20:48,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:20:48,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:20:48,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:20:48,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:20:48,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:20:48,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:20:48,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:20:48,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:20:48,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:20:48,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:20:48,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:20:48,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:20:48,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:20:48,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:20:48,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:20:48,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:20:48,043 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:20:48,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:20:48,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:20:48,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:20:48,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:20:48,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:20:48,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:20:48,060 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:20:48,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:20:48,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:20:48,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:20:48,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:20:48,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:20:48,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:20:48,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:20:48,063 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:20:48,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:20:48,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:20:48,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:20:48,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:20:48,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:20:48,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:20:48,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:20:48,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:20:48,065 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:20:48,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:20:48,065 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:20:48,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:20:48,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:20:48,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:20:48,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:20:48,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:20:48,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:20:48,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:20:48,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:20:48,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:20:48,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:20:48,067 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:20:48,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:20:48,068 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:20:48,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:20:48,068 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:20:48,068 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 [2023-02-15 19:20:48,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:20:48,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:20:48,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:20:48,300 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:20:48,300 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:20:48,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/parity.i [2023-02-15 19:20:49,308 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:20:49,455 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:20:49,455 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/parity.i [2023-02-15 19:20:49,459 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee9e77357/2b88948a9a414dda8107ca7c1a8b8908/FLAG47358b90c [2023-02-15 19:20:49,469 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee9e77357/2b88948a9a414dda8107ca7c1a8b8908 [2023-02-15 19:20:49,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:20:49,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:20:49,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:20:49,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:20:49,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:20:49,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56840292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49, skipping insertion in model container [2023-02-15 19:20:49,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:20:49,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:20:49,581 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2023-02-15 19:20:49,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:20:49,598 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:20:49,605 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2023-02-15 19:20:49,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:20:49,619 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:20:49,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49 WrapperNode [2023-02-15 19:20:49,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:20:49,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:20:49,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:20:49,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:20:49,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,646 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-02-15 19:20:49,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:20:49,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:20:49,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:20:49,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:20:49,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:20:49,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:20:49,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:20:49,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:20:49,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (1/1) ... [2023-02-15 19:20:49,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:20:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:20:49,686 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) [2023-02-15 19:20:49,688 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 [2023-02-15 19:20:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:20:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:20:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:20:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:20:49,810 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:20:49,813 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:20:49,988 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:20:49,992 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:20:50,008 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 19:20:50,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:20:50 BoogieIcfgContainer [2023-02-15 19:20:50,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:20:50,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:20:50,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:20:50,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:20:50,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:20:49" (1/3) ... [2023-02-15 19:20:50,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c8cda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:20:50, skipping insertion in model container [2023-02-15 19:20:50,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:49" (2/3) ... [2023-02-15 19:20:50,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c8cda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:20:50, skipping insertion in model container [2023-02-15 19:20:50,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:20:50" (3/3) ... [2023-02-15 19:20:50,016 INFO L112 eAbstractionObserver]: Analyzing ICFG parity.i [2023-02-15 19:20:50,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:20:50,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:20:50,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:20:50,083 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71814c60, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:20:50,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:20:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 24 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) [2023-02-15 19:20:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 19:20:50,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:50,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:50,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash 446138461, now seen corresponding path program 1 times [2023-02-15 19:20:50,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:20:50,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960107076] [2023-02-15 19:20:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:50,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:20:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:50,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:20:50,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960107076] [2023-02-15 19:20:50,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960107076] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:20:50,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:20:50,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:20:50,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27739796] [2023-02-15 19:20:50,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:20:50,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:20:50,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:20:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:20:50,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:20:50,426 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.608695652173913) internal successors, (37), 24 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) Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:50,480 INFO L93 Difference]: Finished difference Result 77 states and 113 transitions. [2023-02-15 19:20:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 19:20:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 19:20:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:50,488 INFO L225 Difference]: With dead ends: 77 [2023-02-15 19:20:50,488 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 19:20:50,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:20:50,494 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:20:50,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 127 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:20:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 19:20:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-02-15 19:20:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2023-02-15 19:20:50,520 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 12 [2023-02-15 19:20:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:50,521 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2023-02-15 19:20:50,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2023-02-15 19:20:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 19:20:50,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:50,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:50,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 19:20:50,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:50,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:50,523 INFO L85 PathProgramCache]: Analyzing trace with hash 446198043, now seen corresponding path program 1 times [2023-02-15 19:20:50,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:20:50,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905069253] [2023-02-15 19:20:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:50,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:20:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:50,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:20:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905069253] [2023-02-15 19:20:50,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905069253] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:20:50,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:20:50,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:20:50,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517041661] [2023-02-15 19:20:50,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:20:50,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:20:50,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:20:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:20:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:20:50,691 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:50,723 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-02-15 19:20:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 19:20:50,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 19:20:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:50,724 INFO L225 Difference]: With dead ends: 54 [2023-02-15 19:20:50,724 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 19:20:50,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:20:50,725 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:20:50,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 69 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:20:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 19:20:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2023-02-15 19:20:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2023-02-15 19:20:50,740 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 12 [2023-02-15 19:20:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:50,740 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2023-02-15 19:20:50,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2023-02-15 19:20:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 19:20:50,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:50,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:50,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 19:20:50,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1835064901, now seen corresponding path program 1 times [2023-02-15 19:20:50,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:20:50,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894188560] [2023-02-15 19:20:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:50,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:20:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:50,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:20:50,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894188560] [2023-02-15 19:20:50,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894188560] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:20:50,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:20:50,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:20:50,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992079304] [2023-02-15 19:20:50,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:20:50,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:20:50,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:20:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:20:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:20:50,830 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:50,867 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2023-02-15 19:20:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 19:20:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 19:20:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:50,868 INFO L225 Difference]: With dead ends: 59 [2023-02-15 19:20:50,869 INFO L226 Difference]: Without dead ends: 42 [2023-02-15 19:20:50,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:20:50,871 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:20:50,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:20:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-15 19:20:50,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2023-02-15 19:20:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2023-02-15 19:20:50,881 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 13 [2023-02-15 19:20:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:50,881 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2023-02-15 19:20:50,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2023-02-15 19:20:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 19:20:50,882 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:50,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:50,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 19:20:50,883 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1112246352, now seen corresponding path program 1 times [2023-02-15 19:20:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:20:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749619658] [2023-02-15 19:20:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:20:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:51,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:20:51,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749619658] [2023-02-15 19:20:51,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749619658] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:20:51,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:20:51,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:20:51,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235881455] [2023-02-15 19:20:51,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:20:51,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:20:51,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:20:51,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:20:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:20:51,041 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2023-02-15 19:20:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:51,158 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2023-02-15 19:20:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 19:20:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 14 [2023-02-15 19:20:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:51,163 INFO L225 Difference]: With dead ends: 80 [2023-02-15 19:20:51,163 INFO L226 Difference]: Without dead ends: 70 [2023-02-15 19:20:51,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:20:51,168 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:20:51,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 72 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:20:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-15 19:20:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2023-02-15 19:20:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2023-02-15 19:20:51,178 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 14 [2023-02-15 19:20:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:51,178 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2023-02-15 19:20:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2023-02-15 19:20:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2023-02-15 19:20:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 19:20:51,179 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:51,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:51,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 19:20:51,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash 53012834, now seen corresponding path program 1 times [2023-02-15 19:20:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:20:51,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271663170] [2023-02-15 19:20:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:20:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 19:20:51,210 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-15 19:20:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-15 19:20:51,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-15 19:20:51,259 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-15 19:20:51,260 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 19:20:51,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 19:20:51,263 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-02-15 19:20:51,266 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 19:20:51,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 07:20:51 BoogieIcfgContainer [2023-02-15 19:20:51,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 19:20:51,297 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 19:20:51,297 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 19:20:51,297 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 19:20:51,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:20:50" (3/4) ... [2023-02-15 19:20:51,300 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-02-15 19:20:51,300 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 19:20:51,300 INFO L158 Benchmark]: Toolchain (without parser) took 1827.41ms. Allocated memory was 146.8MB in the beginning and 245.4MB in the end (delta: 98.6MB). Free memory was 92.2MB in the beginning and 129.2MB in the end (delta: -37.0MB). Peak memory consumption was 62.7MB. Max. memory is 16.1GB. [2023-02-15 19:20:51,300 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 146.8MB. Free memory is still 84.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 19:20:51,301 INFO L158 Benchmark]: CACSL2BoogieTranslator took 146.00ms. Allocated memory is still 146.8MB. Free memory was 91.7MB in the beginning and 81.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 19:20:51,301 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.33ms. Allocated memory is still 146.8MB. Free memory was 81.2MB in the beginning and 79.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 19:20:51,301 INFO L158 Benchmark]: Boogie Preprocessor took 18.23ms. Allocated memory is still 146.8MB. Free memory was 79.6MB in the beginning and 78.7MB in the end (delta: 956.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 19:20:51,302 INFO L158 Benchmark]: RCFGBuilder took 344.55ms. Allocated memory is still 146.8MB. Free memory was 78.7MB in the beginning and 66.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-15 19:20:51,302 INFO L158 Benchmark]: TraceAbstraction took 1284.70ms. Allocated memory was 146.8MB in the beginning and 245.4MB in the end (delta: 98.6MB). Free memory was 65.0MB in the beginning and 130.2MB in the end (delta: -65.3MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2023-02-15 19:20:51,303 INFO L158 Benchmark]: Witness Printer took 3.03ms. Allocated memory is still 245.4MB. Free memory was 130.2MB in the beginning and 129.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 19:20:51,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 146.8MB. Free memory is still 84.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 146.00ms. Allocated memory is still 146.8MB. Free memory was 91.7MB in the beginning and 81.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.33ms. Allocated memory is still 146.8MB. Free memory was 81.2MB in the beginning and 79.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.23ms. Allocated memory is still 146.8MB. Free memory was 79.6MB in the beginning and 78.7MB in the end (delta: 956.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 344.55ms. Allocated memory is still 146.8MB. Free memory was 78.7MB in the beginning and 66.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1284.70ms. Allocated memory was 146.8MB in the beginning and 245.4MB in the end (delta: 98.6MB). Free memory was 65.0MB in the beginning and 130.2MB in the end (delta: -65.3MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. * Witness Printer took 3.03ms. Allocated memory is still 245.4MB. Free memory was 130.2MB in the beginning and 129.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseXor at line 59, overapproximation of bitwiseAnd at line 62. Possible FailurePath: [L42] unsigned int v = __VERIFIER_nondet_uint(); [L43] unsigned int v1; [L44] unsigned int v2; [L45] char parity1; [L46] char parity2; [L47] v1 = v [L48] parity1 = (char)0 VAL [parity1=0, v=0, v1=0] [L49] COND FALSE !(v1 != 0) VAL [parity1=0, v=0, v1=0] [L57] v2 = v [L58] parity2 = (char)0 VAL [parity1=0, parity2=0, v=0, v1=0, v2=0] [L59] v2 = v2 ^ (v2 >> 1u) VAL [parity1=0, parity2=0, v=0, v1=0, v2=1] [L60] v2 = v2 ^ (v2 >> 2u) [L61] v2 = (v2 & 286331153U) * 286331153U VAL [parity1=0, parity2=0, v=0, v1=0, v2=572662306] [L62] COND FALSE !(((v2 >> 28u) & 1u) == 0) [L65] parity2 = (char)1 VAL [parity1=0, parity2=1, v=0, v1=0, v2=572662306] [L67] CALL __VERIFIER_assert(parity1 == parity2) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 114 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 114 mSDsluCounter, 333 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 221 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 128 IncrementalHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 112 mSDtfsCounter, 128 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 112 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-02-15 19:20:51,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/bitvector/parity.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:20:53,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:20:53,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:20:53,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:20:53,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:20:53,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:20:53,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:20:53,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:20:53,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:20:53,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:20:53,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:20:53,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:20:53,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:20:53,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:20:53,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:20:53,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:20:53,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:20:53,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:20:53,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:20:53,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:20:53,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:20:53,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:20:53,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:20:53,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:20:53,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:20:53,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:20:53,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:20:53,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:20:53,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:20:53,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:20:53,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:20:53,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:20:53,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:20:53,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:20:53,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:20:53,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:20:53,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:20:53,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:20:53,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:20:53,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:20:53,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:20:53,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-02-15 19:20:53,373 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:20:53,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:20:53,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:20:53,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:20:53,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:20:53,376 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:20:53,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:20:53,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:20:53,376 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:20:53,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:20:53,377 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:20:53,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:20:53,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:20:53,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:20:53,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:20:53,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:20:53,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 19:20:53,378 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-02-15 19:20:53,378 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-02-15 19:20:53,378 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:20:53,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:20:53,379 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:20:53,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:20:53,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:20:53,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:20:53,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:20:53,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:20:53,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:20:53,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:20:53,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:20:53,380 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-02-15 19:20:53,380 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-02-15 19:20:53,381 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:20:53,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:20:53,381 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:20:53,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:20:53,381 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-02-15 19:20:53,381 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:20:53,381 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 [2023-02-15 19:20:53,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:20:53,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:20:53,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:20:53,673 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:20:53,674 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:20:53,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/parity.i [2023-02-15 19:20:54,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:20:54,834 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:20:54,835 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/parity.i [2023-02-15 19:20:54,839 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad8eb5d86/79999d792a554f29ad4af342ac0d81b2/FLAG20b14ffd4 [2023-02-15 19:20:54,848 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad8eb5d86/79999d792a554f29ad4af342ac0d81b2 [2023-02-15 19:20:54,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:20:54,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:20:54,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:20:54,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:20:54,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:20:54,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:20:54" (1/1) ... [2023-02-15 19:20:54,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731fb2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:54, skipping insertion in model container [2023-02-15 19:20:54,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:20:54" (1/1) ... [2023-02-15 19:20:54,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:20:54,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:20:54,958 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2023-02-15 19:20:54,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:20:55,000 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:20:55,009 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2023-02-15 19:20:55,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:20:55,025 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:20:55,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55 WrapperNode [2023-02-15 19:20:55,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:20:55,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:20:55,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:20:55,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:20:55,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,048 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-02-15 19:20:55,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:20:55,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:20:55,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:20:55,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:20:55,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,077 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:20:55,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:20:55,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:20:55,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:20:55,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (1/1) ... [2023-02-15 19:20:55,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:20:55,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:20:55,107 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) [2023-02-15 19:20:55,134 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 [2023-02-15 19:20:55,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:20:55,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-02-15 19:20:55,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:20:55,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:20:55,204 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:20:55,206 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:20:55,328 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:20:55,333 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:20:55,333 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 19:20:55,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:20:55 BoogieIcfgContainer [2023-02-15 19:20:55,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:20:55,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:20:55,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:20:55,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:20:55,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:20:54" (1/3) ... [2023-02-15 19:20:55,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e62db5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:20:55, skipping insertion in model container [2023-02-15 19:20:55,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:20:55" (2/3) ... [2023-02-15 19:20:55,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e62db5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:20:55, skipping insertion in model container [2023-02-15 19:20:55,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:20:55" (3/3) ... [2023-02-15 19:20:55,342 INFO L112 eAbstractionObserver]: Analyzing ICFG parity.i [2023-02-15 19:20:55,365 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:20:55,365 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:20:55,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:20:55,398 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a4c4a3a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:20:55,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:20:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 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) [2023-02-15 19:20:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 19:20:55,405 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:55,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:55,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:55,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash 561227051, now seen corresponding path program 1 times [2023-02-15 19:20:55,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:20:55,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007045154] [2023-02-15 19:20:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:55,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:55,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:20:55,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:20:55,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-02-15 19:20:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:55,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 19:20:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:20:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:55,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:20:55,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 19:20:55,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007045154] [2023-02-15 19:20:55,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007045154] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:20:55,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:20:55,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 19:20:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594694231] [2023-02-15 19:20:55,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:20:55,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 19:20:55,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 19:20:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 19:20:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:20:55,550 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:55,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:55,560 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-02-15 19:20:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 19:20:55,562 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 19:20:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:55,566 INFO L225 Difference]: With dead ends: 25 [2023-02-15 19:20:55,566 INFO L226 Difference]: Without dead ends: 11 [2023-02-15 19:20:55,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:20:55,570 INFO L413 NwaCegarLoop]: 17 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, 17 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 [2023-02-15 19:20:55,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:20:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-15 19:20:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-15 19:20:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-02-15 19:20:55,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2023-02-15 19:20:55,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:55,606 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-02-15 19:20:55,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-02-15 19:20:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 19:20:55,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:55,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:55,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-02-15 19:20:55,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:55,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash 246306390, now seen corresponding path program 1 times [2023-02-15 19:20:55,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:20:55,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830120789] [2023-02-15 19:20:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:55,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:55,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:20:55,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:20:55,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-02-15 19:20:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:55,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 19:20:55,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:20:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:55,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:20:55,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 19:20:55,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830120789] [2023-02-15 19:20:55,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830120789] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:20:55,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:20:55,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:20:55,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326429093] [2023-02-15 19:20:55,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:20:55,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:20:55,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 19:20:55,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:20:55,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:20:55,961 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:55,999 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2023-02-15 19:20:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 19:20:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 19:20:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:56,000 INFO L225 Difference]: With dead ends: 31 [2023-02-15 19:20:56,000 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 19:20:56,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:20:56,003 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:20:56,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:20:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 19:20:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-02-15 19:20:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2023-02-15 19:20:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-02-15 19:20:56,006 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2023-02-15 19:20:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:56,007 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-02-15 19:20:56,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:56,007 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-02-15 19:20:56,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 19:20:56,007 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:56,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:56,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-02-15 19:20:56,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:56,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash 246365972, now seen corresponding path program 1 times [2023-02-15 19:20:56,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:20:56,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236842697] [2023-02-15 19:20:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:56,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:56,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:20:56,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:20:56,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-02-15 19:20:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 19:20:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:20:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:56,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:20:56,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 19:20:56,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236842697] [2023-02-15 19:20:56,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236842697] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:20:56,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:20:56,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:20:56,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847715730] [2023-02-15 19:20:56,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:20:56,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:20:56,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 19:20:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:20:56,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:20:56,308 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:56,390 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-02-15 19:20:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 19:20:56,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 19:20:56,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:56,391 INFO L225 Difference]: With dead ends: 25 [2023-02-15 19:20:56,392 INFO L226 Difference]: Without dead ends: 19 [2023-02-15 19:20:56,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:20:56,393 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:20:56,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:20:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-15 19:20:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-02-15 19:20:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2023-02-15 19:20:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-02-15 19:20:56,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2023-02-15 19:20:56,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:56,396 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-02-15 19:20:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-02-15 19:20:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 19:20:56,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:56,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:56,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-02-15 19:20:56,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:56,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash -967615425, now seen corresponding path program 1 times [2023-02-15 19:20:56,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:20:56,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976120570] [2023-02-15 19:20:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:56,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:56,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:20:56,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:20:56,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-02-15 19:20:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:56,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 19:20:56,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:20:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:56,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:20:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:57,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 19:20:57,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976120570] [2023-02-15 19:20:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976120570] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:20:57,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:20:57,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-15 19:20:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293306131] [2023-02-15 19:20:57,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:20:57,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 19:20:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 19:20:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 19:20:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-15 19:20:57,189 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:57,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:57,777 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2023-02-15 19:20:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:20:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 19:20:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:57,778 INFO L225 Difference]: With dead ends: 53 [2023-02-15 19:20:57,778 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 19:20:57,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-02-15 19:20:57,779 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:20:57,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 71 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 19:20:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 19:20:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 29. [2023-02-15 19:20:57,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2023-02-15 19:20:57,785 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2023-02-15 19:20:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:57,786 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2023-02-15 19:20:57,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2023-02-15 19:20:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 19:20:57,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:57,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:57,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-02-15 19:20:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:57,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash -967555843, now seen corresponding path program 1 times [2023-02-15 19:20:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:20:57,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602014079] [2023-02-15 19:20:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:57,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:57,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:20:57,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:20:57,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-02-15 19:20:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 19:20:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:20:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:58,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:20:58,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 19:20:58,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602014079] [2023-02-15 19:20:58,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602014079] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:20:58,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:20:58,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 19:20:58,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264185311] [2023-02-15 19:20:58,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:20:58,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:20:58,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 19:20:58,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:20:58,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:20:58,049 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2023-02-15 19:20:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:20:58,069 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2023-02-15 19:20:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 19:20:58,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) Word has length 11 [2023-02-15 19:20:58,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:20:58,070 INFO L225 Difference]: With dead ends: 53 [2023-02-15 19:20:58,070 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 19:20:58,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:20:58,071 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:20:58,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:20:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 19:20:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2023-02-15 19:20:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:20:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-02-15 19:20:58,075 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2023-02-15 19:20:58,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:20:58,076 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-02-15 19:20:58,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2023-02-15 19:20:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-02-15 19:20:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-15 19:20:58,076 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:20:58,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:20:58,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-02-15 19:20:58,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:58,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:20:58,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:20:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2097060814, now seen corresponding path program 1 times [2023-02-15 19:20:58,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:20:58,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067026050] [2023-02-15 19:20:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:20:58,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:20:58,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:20:58,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:20:58,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-02-15 19:20:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:20:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 19:20:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:20:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:58,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:20:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:20:59,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 19:20:59,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067026050] [2023-02-15 19:20:59,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067026050] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:20:59,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:20:59,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-02-15 19:20:59,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767531565] [2023-02-15 19:20:59,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:20:59,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 19:20:59,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 19:20:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 19:20:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:20:59,751 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:21:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:00,407 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2023-02-15 19:21:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 19:21:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-15 19:21:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:00,409 INFO L225 Difference]: With dead ends: 41 [2023-02-15 19:21:00,409 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 19:21:00,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2023-02-15 19:21:00,410 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:00,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 67 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:21:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 19:21:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-02-15 19:21:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:21:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-02-15 19:21:00,413 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 14 [2023-02-15 19:21:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:00,414 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-02-15 19:21:00,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:21:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-02-15 19:21:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 19:21:00,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:00,414 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:00,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:00,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:21:00,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:00,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1350338813, now seen corresponding path program 1 times [2023-02-15 19:21:00,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:21:00,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435943069] [2023-02-15 19:21:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:00,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:21:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:21:00,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:21:00,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-02-15 19:21:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:00,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 19:21:00,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:21:02,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:21:12,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 19:21:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435943069] [2023-02-15 19:21:12,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435943069] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:12,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:21:12,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2023-02-15 19:21:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394055870] [2023-02-15 19:21:12,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:12,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 19:21:12,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 19:21:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 19:21:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-02-15 19:21:12,510 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:21:14,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 19:21:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:30,544 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2023-02-15 19:21:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 19:21:30,545 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 19:21:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:30,549 INFO L225 Difference]: With dead ends: 62 [2023-02-15 19:21:30,550 INFO L226 Difference]: Without dead ends: 54 [2023-02-15 19:21:30,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 19:21:30,551 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:30,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 145 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-02-15 19:21:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-15 19:21:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2023-02-15 19:21:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:21:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2023-02-15 19:21:30,561 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 23 [2023-02-15 19:21:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:30,562 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2023-02-15 19:21:30,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:21:30,564 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2023-02-15 19:21:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 19:21:30,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:30,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:30,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:30,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:21:30,766 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash -671341842, now seen corresponding path program 2 times [2023-02-15 19:21:30,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:21:30,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508781190] [2023-02-15 19:21:30,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:21:30,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:21:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:21:30,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:21:30,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-02-15 19:21:30,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:21:30,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:21:30,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 19:21:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:21:32,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:21:52,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-02-15 19:21:52,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508781190] [2023-02-15 19:21:52,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508781190] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:52,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:21:52,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2023-02-15 19:21:52,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512429043] [2023-02-15 19:21:52,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:52,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 19:21:52,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-02-15 19:21:52,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 19:21:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2023-02-15 19:21:52,109 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:22:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:13,594 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2023-02-15 19:22:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 19:22:13,595 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-15 19:22:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:13,596 INFO L225 Difference]: With dead ends: 65 [2023-02-15 19:22:13,596 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 19:22:13,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=299, Invalid=1107, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 19:22:13,597 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:13,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 136 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 19:22:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 19:22:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-02-15 19:22:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:22:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-02-15 19:22:13,603 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 26 [2023-02-15 19:22:13,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:13,603 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-02-15 19:22:13,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:22:13,603 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-02-15 19:22:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 19:22:13,604 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:13,604 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:22:13,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:13,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:22:13,805 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1314219381, now seen corresponding path program 2 times [2023-02-15 19:22:13,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-02-15 19:22:13,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109000327] [2023-02-15 19:22:13,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:22:13,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-02-15 19:22:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-02-15 19:22:13,807 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-02-15 19:22:13,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-02-15 19:22:14,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:22:14,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:22:14,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 19:22:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:22:29,318 INFO L328 TraceCheckSpWp]: Computing backward predicates...