./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/xor5.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 a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:53:44,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:53:44,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:53:44,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:53:44,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:53:44,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:53:44,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:53:44,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:53:44,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:53:44,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:53:44,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:53:44,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:53:44,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:53:44,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:53:44,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:53:44,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:53:44,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:53:44,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:53:44,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:53:44,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:53:44,506 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:53:44,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:53:44,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:53:44,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:53:44,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:53:44,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:53:44,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:53:44,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:53:44,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:53:44,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:53:44,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:53:44,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:53:44,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:53:44,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:53:44,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:53:44,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:53:44,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:53:44,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:53:44,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:53:44,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:53:44,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:53:44,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:53:44,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:53:44,545 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:53:44,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:53:44,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:53:44,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:53:44,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:53:44,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:53:44,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:53:44,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:53:44,548 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:53:44,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:53:44,548 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:53:44,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:53:44,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:53:44,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:53:44,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:53:44,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:53:44,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:53:44,549 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:53:44,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:53:44,550 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:53:44,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:53:44,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:53:44,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:53:44,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:53:44,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:53:44,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:53:44,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:53:44,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:53:44,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:53:44,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:53:44,552 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:53:44,552 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:53:44,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:53:44,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2022-07-19 09:53:44,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:53:44,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:53:44,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:53:44,760 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:53:44,761 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:53:44,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor5.i [2022-07-19 09:53:44,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/519c1932e/6e1e7ff0948048809c74008d0fcc1007/FLAG3c57af351 [2022-07-19 09:53:45,143 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:53:45,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2022-07-19 09:53:45,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/519c1932e/6e1e7ff0948048809c74008d0fcc1007/FLAG3c57af351 [2022-07-19 09:53:45,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/519c1932e/6e1e7ff0948048809c74008d0fcc1007 [2022-07-19 09:53:45,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:53:45,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:53:45,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:53:45,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:53:45,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:53:45,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ace1a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45, skipping insertion in model container [2022-07-19 09:53:45,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:53:45,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:53:45,720 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2022-07-19 09:53:45,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:53:45,729 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:53:45,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2022-07-19 09:53:45,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:53:45,755 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:53:45,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45 WrapperNode [2022-07-19 09:53:45,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:53:45,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:53:45,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:53:45,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:53:45,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,794 INFO L137 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-07-19 09:53:45,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:53:45,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:53:45,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:53:45,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:53:45,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:53:45,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:53:45,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:53:45,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:53:45,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (1/1) ... [2022-07-19 09:53:45,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:53:45,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:45,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 09:53:45,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 09:53:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:53:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:53:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:53:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:53:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:53:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:53:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:53:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2022-07-19 09:53:45,914 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2022-07-19 09:53:45,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:53:46,010 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:53:46,011 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:53:46,171 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:53:46,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:53:46,175 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 09:53:46,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:53:46 BoogieIcfgContainer [2022-07-19 09:53:46,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:53:46,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:53:46,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:53:46,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:53:46,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:53:45" (1/3) ... [2022-07-19 09:53:46,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3d8068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:53:46, skipping insertion in model container [2022-07-19 09:53:46,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:45" (2/3) ... [2022-07-19 09:53:46,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3d8068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:53:46, skipping insertion in model container [2022-07-19 09:53:46,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:53:46" (3/3) ... [2022-07-19 09:53:46,194 INFO L111 eAbstractionObserver]: Analyzing ICFG xor5.i [2022-07-19 09:53:46,203 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:53:46,205 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:53:46,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:53:46,258 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4242b4a5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@536dd20f [2022-07-19 09:53:46,259 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:53:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 09:53:46,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:46,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:46,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:46,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2030793856, now seen corresponding path program 1 times [2022-07-19 09:53:46,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:46,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226383288] [2022-07-19 09:53:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:46,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 09:53:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 09:53:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 09:53:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:46,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:46,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226383288] [2022-07-19 09:53:46,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226383288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:46,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:53:46,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:53:46,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174926887] [2022-07-19 09:53:46,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:46,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:53:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:46,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:53:46,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:53:46,444 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:46,467 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-07-19 09:53:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:53:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-07-19 09:53:46,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:46,473 INFO L225 Difference]: With dead ends: 51 [2022-07-19 09:53:46,473 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 09:53:46,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:53:46,478 INFO L413 NwaCegarLoop]: 33 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, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:46,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 09:53:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 09:53:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-19 09:53:46,512 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2022-07-19 09:53:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:46,512 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-19 09:53:46,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-19 09:53:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 09:53:46,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:46,515 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:53:46,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1398988038, now seen corresponding path program 1 times [2022-07-19 09:53:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:46,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299169549] [2022-07-19 09:53:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:46,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 09:53:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 09:53:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-19 09:53:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:46,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:46,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299169549] [2022-07-19 09:53:46,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299169549] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:46,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:53:46,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:53:46,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111162001] [2022-07-19 09:53:46,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:46,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:53:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:53:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:53:46,653 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:46,683 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-07-19 09:53:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:53:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-07-19 09:53:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:46,685 INFO L225 Difference]: With dead ends: 43 [2022-07-19 09:53:46,686 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 09:53:46,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:53:46,689 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:46,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 09:53:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-19 09:53:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:46,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-19 09:53:46,698 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2022-07-19 09:53:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:46,698 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-19 09:53:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:46,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-19 09:53:46,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 09:53:46,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:46,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:46,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:53:46,701 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1708163684, now seen corresponding path program 1 times [2022-07-19 09:53:46,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:46,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537625919] [2022-07-19 09:53:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:46,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 09:53:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:53:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 09:53:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 09:53:46,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537625919] [2022-07-19 09:53:46,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537625919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656805850] [2022-07-19 09:53:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:46,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:46,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:46,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:53:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:53:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:46,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:46,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656805850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:46,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:46,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-19 09:53:46,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141206953] [2022-07-19 09:53:46,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:46,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 09:53:46,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 09:53:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 09:53:46,972 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 09:53:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:47,031 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-07-19 09:53:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 09:53:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 31 [2022-07-19 09:53:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:47,032 INFO L225 Difference]: With dead ends: 47 [2022-07-19 09:53:47,032 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 09:53:47,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-19 09:53:47,033 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:47,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 09:53:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-19 09:53:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-19 09:53:47,037 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 31 [2022-07-19 09:53:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:47,037 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-19 09:53:47,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 09:53:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-19 09:53:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 09:53:47,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:47,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:47,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:47,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:47,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:47,256 INFO L85 PathProgramCache]: Analyzing trace with hash 533240604, now seen corresponding path program 1 times [2022-07-19 09:53:47,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:47,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449922687] [2022-07-19 09:53:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:47,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:47,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 09:53:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:47,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 09:53:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:47,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-19 09:53:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 09:53:47,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:47,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449922687] [2022-07-19 09:53:47,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449922687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:47,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160311478] [2022-07-19 09:53:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:47,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:47,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:47,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:47,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:53:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:47,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:53:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 09:53:47,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:53:47,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160311478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:47,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 09:53:47,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-19 09:53:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332444316] [2022-07-19 09:53:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:47,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:53:47,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:53:47,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 09:53:47,422 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 09:53:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:47,442 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-07-19 09:53:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 09:53:47,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-19 09:53:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:47,443 INFO L225 Difference]: With dead ends: 42 [2022-07-19 09:53:47,443 INFO L226 Difference]: Without dead ends: 29 [2022-07-19 09:53:47,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 09:53:47,444 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:47,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-19 09:53:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-19 09:53:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-19 09:53:47,449 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2022-07-19 09:53:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:47,451 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-19 09:53:47,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 09:53:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-19 09:53:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 09:53:47,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:47,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:47,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 09:53:47,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 09:53:47,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash 850880602, now seen corresponding path program 1 times [2022-07-19 09:53:47,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:47,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492687824] [2022-07-19 09:53:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:47,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 09:53:47,747 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 09:53:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 09:53:47,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 09:53:47,795 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 09:53:47,796 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 09:53:47,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 09:53:47,801 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 09:53:47,803 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 09:53:47,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:53:47 BoogieIcfgContainer [2022-07-19 09:53:47,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 09:53:47,831 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 09:53:47,831 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 09:53:47,831 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 09:53:47,831 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:53:46" (3/4) ... [2022-07-19 09:53:47,833 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-19 09:53:47,833 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 09:53:47,834 INFO L158 Benchmark]: Toolchain (without parser) took 2280.46ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 83.1MB in the beginning and 91.4MB in the end (delta: -8.3MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. [2022-07-19 09:53:47,834 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 09:53:47,834 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.07ms. Allocated memory is still 107.0MB. Free memory was 83.1MB in the beginning and 82.2MB in the end (delta: 936.9kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 09:53:47,835 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.82ms. Allocated memory is still 107.0MB. Free memory was 82.2MB in the beginning and 80.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 09:53:47,835 INFO L158 Benchmark]: Boogie Preprocessor took 40.89ms. Allocated memory is still 107.0MB. Free memory was 80.5MB in the beginning and 79.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 09:53:47,835 INFO L158 Benchmark]: RCFGBuilder took 337.07ms. Allocated memory is still 107.0MB. Free memory was 79.0MB in the beginning and 67.9MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-19 09:53:47,835 INFO L158 Benchmark]: TraceAbstraction took 1652.14ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 67.1MB in the beginning and 91.4MB in the end (delta: -24.3MB). Peak memory consumption was 819.3kB. Max. memory is 16.1GB. [2022-07-19 09:53:47,836 INFO L158 Benchmark]: Witness Printer took 2.85ms. Allocated memory is still 130.0MB. Free memory is still 91.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 09:53:47,837 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 107.0MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.07ms. Allocated memory is still 107.0MB. Free memory was 83.1MB in the beginning and 82.2MB in the end (delta: 936.9kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.82ms. Allocated memory is still 107.0MB. Free memory was 82.2MB in the beginning and 80.5MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 40.89ms. Allocated memory is still 107.0MB. Free memory was 80.5MB in the beginning and 79.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 337.07ms. Allocated memory is still 107.0MB. Free memory was 79.0MB in the beginning and 67.9MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1652.14ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 67.1MB in the beginning and 91.4MB in the end (delta: -24.3MB). Peak memory consumption was 819.3kB. Max. memory is 16.1GB. * Witness Printer took 2.85ms. Allocated memory is still 130.0MB. Free memory is still 91.4MB. 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: 57]: 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 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [i=0, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=1, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=2, N=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [i=2, N=2, x={9:0}] [L45] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-1, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ VAL [i=2, N=2, res=0, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, res=0, x={9:0}, x={9:0}] [L27] return res; VAL [\result=0, i=2, N=2, res=0, x={9:0}, x={9:0}] [L45] RET, EXPR xor(x) VAL [i=2, N=2, x={9:0}, xor(x)=0] [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [i=2, N=2, ret=0, temp=-1, x={9:0}] [L48] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=1, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res ^ x[i] [L24] i++ VAL [i=2, N=2, res=1, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, res=1, x={9:0}, x={9:0}] [L27] return res; VAL [\result=1, i=2, N=2, res=1, x={9:0}, x={9:0}] [L48] RET, EXPR xor(x) VAL [i=2, N=2, ret=0, temp=-1, x={9:0}, xor(x)=1] [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [i=0, i=2, N=2, ret=0, ret2=1, temp=1, x={9:0}] [L50] COND TRUE i 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 -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2022-07-19 09:53:49,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:53:49,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:53:49,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:53:49,962 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:53:49,962 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:53:49,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor5.i [2022-07-19 09:53:50,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f2b447/3bb4c6cc4eb64006bf248335fca7d7d9/FLAG9319698dc [2022-07-19 09:53:50,364 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:53:50,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i [2022-07-19 09:53:50,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f2b447/3bb4c6cc4eb64006bf248335fca7d7d9/FLAG9319698dc [2022-07-19 09:53:50,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c69f2b447/3bb4c6cc4eb64006bf248335fca7d7d9 [2022-07-19 09:53:50,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:53:50,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:53:50,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:53:50,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:53:50,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:53:50,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be0ee1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50, skipping insertion in model container [2022-07-19 09:53:50,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:53:50,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:53:50,523 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2022-07-19 09:53:50,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:53:50,573 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:53:50,603 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2022-07-19 09:53:50,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:53:50,615 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:53:50,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50 WrapperNode [2022-07-19 09:53:50,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:53:50,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:53:50,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:53:50,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:53:50,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,659 INFO L137 Inliner]: procedures = 18, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 72 [2022-07-19 09:53:50,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:53:50,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:53:50,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:53:50,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:53:50,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:53:50,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:53:50,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:53:50,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:53:50,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (1/1) ... [2022-07-19 09:53:50,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:53:50,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:50,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 09:53:50,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 09:53:50,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:53:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-19 09:53:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:53:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-19 09:53:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:53:50,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:53:50,768 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2022-07-19 09:53:50,769 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2022-07-19 09:53:50,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:53:50,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-19 09:53:50,848 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:53:50,864 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:53:51,022 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:53:51,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:53:51,030 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 09:53:51,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:53:51 BoogieIcfgContainer [2022-07-19 09:53:51,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:53:51,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:53:51,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:53:51,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:53:51,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:53:50" (1/3) ... [2022-07-19 09:53:51,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fda1b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:53:51, skipping insertion in model container [2022-07-19 09:53:51,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:50" (2/3) ... [2022-07-19 09:53:51,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fda1b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:53:51, skipping insertion in model container [2022-07-19 09:53:51,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:53:51" (3/3) ... [2022-07-19 09:53:51,038 INFO L111 eAbstractionObserver]: Analyzing ICFG xor5.i [2022-07-19 09:53:51,048 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:53:51,048 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:53:51,081 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:53:51,088 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6ec2a349, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@588b8e3d [2022-07-19 09:53:51,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:53:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 09:53:51,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:51,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:51,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:51,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2030793856, now seen corresponding path program 1 times [2022-07-19 09:53:51,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:53:51,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627654643] [2022-07-19 09:53:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:51,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:53:51,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:53:51,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:53:51,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-19 09:53:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:51,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-19 09:53:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:53:51,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:53:51,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:53:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627654643] [2022-07-19 09:53:51,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627654643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:51,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:53:51,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:53:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418877363] [2022-07-19 09:53:51,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:51,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:53:51,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:53:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:53:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:53:51,319 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:51,337 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-07-19 09:53:51,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:53:51,339 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-07-19 09:53:51,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:51,343 INFO L225 Difference]: With dead ends: 51 [2022-07-19 09:53:51,344 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 09:53:51,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:53:51,350 INFO L413 NwaCegarLoop]: 33 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, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:51,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 09:53:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 09:53:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-19 09:53:51,389 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2022-07-19 09:53:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:51,389 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-19 09:53:51,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-19 09:53:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 09:53:51,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:51,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:51,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:51,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:53:51,597 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:51,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:51,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1398988038, now seen corresponding path program 1 times [2022-07-19 09:53:51,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:53:51,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432754110] [2022-07-19 09:53:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:51,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:53:51,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:53:51,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:53:51,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-19 09:53:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:53:51,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:51,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:53:51,751 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:53:51,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432754110] [2022-07-19 09:53:51,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432754110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:51,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:53:51,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:53:51,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277793421] [2022-07-19 09:53:51,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:53:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:53:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:53:51,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:53:51,759 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:51,788 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-07-19 09:53:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:53:51,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-07-19 09:53:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:51,789 INFO L225 Difference]: With dead ends: 43 [2022-07-19 09:53:51,789 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 09:53:51,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:53:51,790 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:51,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 09:53:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-19 09:53:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-19 09:53:51,802 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2022-07-19 09:53:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:51,802 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-19 09:53:51,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-19 09:53:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 09:53:51,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:51,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:51,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:52,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:53:52,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1708163684, now seen corresponding path program 1 times [2022-07-19 09:53:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:53:52,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76062169] [2022-07-19 09:53:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:52,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:53:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:53:52,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:53:52,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-19 09:53:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:53:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:52,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:52,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:53:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76062169] [2022-07-19 09:53:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76062169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:52,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:53:52,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-19 09:53:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306542862] [2022-07-19 09:53:52,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 09:53:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:53:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 09:53:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 09:53:52,200 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:52,286 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-07-19 09:53:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:53:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2022-07-19 09:53:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:52,288 INFO L225 Difference]: With dead ends: 45 [2022-07-19 09:53:52,288 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 09:53:52,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 09:53:52,290 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:52,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:53:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 09:53:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-19 09:53:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-19 09:53:52,294 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2022-07-19 09:53:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:52,294 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-19 09:53:52,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-19 09:53:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 09:53:52,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:52,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:52,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:52,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:53:52,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1821751230, now seen corresponding path program 2 times [2022-07-19 09:53:52,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:53:52,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536739407] [2022-07-19 09:53:52,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:53:52,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:53:52,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:53:52,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:53:52,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-19 09:53:52,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 09:53:52,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:53:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:53:52,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:53:52,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:53:52,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536739407] [2022-07-19 09:53:52,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536739407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:52,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:53:52,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:53:52,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338345724] [2022-07-19 09:53:52,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:52,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:53:52,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:53:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:53:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:53:52,610 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:52,646 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-07-19 09:53:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 09:53:52,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-07-19 09:53:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:52,647 INFO L225 Difference]: With dead ends: 45 [2022-07-19 09:53:52,647 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 09:53:52,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:53:52,648 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:52,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 09:53:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-07-19 09:53:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-19 09:53:52,654 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2022-07-19 09:53:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:52,654 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-19 09:53:52,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-19 09:53:52,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 09:53:52,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:52,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:52,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:52,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:53:52,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:52,864 INFO L85 PathProgramCache]: Analyzing trace with hash 533240604, now seen corresponding path program 1 times [2022-07-19 09:53:52,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:53:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059074687] [2022-07-19 09:53:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:52,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:53:52,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:53:52,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:53:52,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-19 09:53:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 09:53:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 09:53:53,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:53:53,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:53:53,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059074687] [2022-07-19 09:53:53,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059074687] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:53,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:53:53,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-19 09:53:53,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768278519] [2022-07-19 09:53:53,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:53,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 09:53:53,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:53:53,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 09:53:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-19 09:53:53,235 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 09:53:53,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:53,426 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-07-19 09:53:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 09:53:53,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-07-19 09:53:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:53,428 INFO L225 Difference]: With dead ends: 65 [2022-07-19 09:53:53,428 INFO L226 Difference]: Without dead ends: 52 [2022-07-19 09:53:53,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-07-19 09:53:53,429 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:53,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 62 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:53:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-19 09:53:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2022-07-19 09:53:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-19 09:53:53,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2022-07-19 09:53:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:53,434 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-19 09:53:53,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 09:53:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-19 09:53:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 09:53:53,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:53,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:53,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:53,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:53:53,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:53,648 INFO L85 PathProgramCache]: Analyzing trace with hash 850880602, now seen corresponding path program 1 times [2022-07-19 09:53:53,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:53:53,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584264647] [2022-07-19 09:53:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:53,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:53:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:53:53,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:53:53,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-19 09:53:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:53,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-19 09:53:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:53:54,076 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:53:54,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2022-07-19 09:53:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:53:54,407 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:53:54,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2022-07-19 09:53:54,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:53:54,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:53:54,505 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:53:54,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 48 [2022-07-19 09:53:54,683 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:53:54,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 25 [2022-07-19 09:53:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 09:53:54,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:54:00,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-07-19 09:54:00,514 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 09:54:00,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 88 [2022-07-19 09:54:07,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-07-19 09:54:07,954 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-07-19 09:54:07,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 1 [2022-07-19 09:54:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 14 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:54:08,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:54:08,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584264647] [2022-07-19 09:54:08,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584264647] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:54:08,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:54:08,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2022-07-19 09:54:08,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93259987] [2022-07-19 09:54:08,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:54:08,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 09:54:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:54:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 09:54:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1455, Unknown=2, NotChecked=0, Total=1640 [2022-07-19 09:54:08,313 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 09:54:10,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 09:54:14,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 09:54:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:54:18,328 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2022-07-19 09:54:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 09:54:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-07-19 09:54:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:54:18,332 INFO L225 Difference]: With dead ends: 84 [2022-07-19 09:54:18,332 INFO L226 Difference]: Without dead ends: 80 [2022-07-19 09:54:18,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=385, Invalid=2692, Unknown=3, NotChecked=0, Total=3080 [2022-07-19 09:54:18,334 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:54:18,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 194 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 758 Invalid, 1 Unknown, 46 Unchecked, 5.9s Time] [2022-07-19 09:54:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-19 09:54:18,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2022-07-19 09:54:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-19 09:54:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2022-07-19 09:54:18,346 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 41 [2022-07-19 09:54:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:54:18,346 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2022-07-19 09:54:18,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 09:54:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2022-07-19 09:54:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 09:54:18,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:54:18,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:54:18,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:54:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:54:18,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:54:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:54:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash 88846840, now seen corresponding path program 2 times [2022-07-19 09:54:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:54:18,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152261263] [2022-07-19 09:54:18,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:54:18,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:54:18,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:54:18,560 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:54:18,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-19 09:54:18,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:54:18,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:54:18,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 09:54:18,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:54:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 09:54:18,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:54:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 09:54:19,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:54:19,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152261263] [2022-07-19 09:54:19,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152261263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:54:19,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:54:19,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2022-07-19 09:54:19,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622713242] [2022-07-19 09:54:19,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:54:19,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:54:19,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:54:19,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:54:19,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:54:19,142 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:54:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:54:19,581 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2022-07-19 09:54:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 09:54:19,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-07-19 09:54:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:54:19,583 INFO L225 Difference]: With dead ends: 104 [2022-07-19 09:54:19,583 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 09:54:19,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:54:19,584 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 89 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:54:19,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 157 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:54:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 09:54:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2022-07-19 09:54:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 09:54:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-19 09:54:19,591 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2022-07-19 09:54:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:54:19,592 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-19 09:54:19,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:54:19,592 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-19 09:54:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 09:54:19,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:54:19,593 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:54:19,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:54:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:54:19,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:54:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:54:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1417469948, now seen corresponding path program 3 times [2022-07-19 09:54:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:54:19,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521131714] [2022-07-19 09:54:19,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:54:19,798 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:54:19,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:54:19,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:54:19,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-19 09:54:19,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 09:54:19,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:54:19,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:54:19,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:54:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 09:54:19,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:54:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 09:54:20,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:54:20,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521131714] [2022-07-19 09:54:20,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521131714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:54:20,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:54:20,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-07-19 09:54:20,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556825392] [2022-07-19 09:54:20,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:54:20,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:54:20,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:54:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:54:20,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:54:20,159 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:54:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:54:20,397 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-07-19 09:54:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:54:20,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-07-19 09:54:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:54:20,399 INFO L225 Difference]: With dead ends: 77 [2022-07-19 09:54:20,399 INFO L226 Difference]: Without dead ends: 58 [2022-07-19 09:54:20,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:54:20,400 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:54:20,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 113 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:54:20,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-19 09:54:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-07-19 09:54:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-19 09:54:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-07-19 09:54:20,406 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2022-07-19 09:54:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:54:20,407 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-07-19 09:54:20,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:54:20,407 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-07-19 09:54:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 09:54:20,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:54:20,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:54:20,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:54:20,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:54:20,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:54:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:54:20,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2102516822, now seen corresponding path program 4 times [2022-07-19 09:54:20,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:54:20,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [550361364] [2022-07-19 09:54:20,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:54:20,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:54:20,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:54:20,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:54:20,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-19 09:54:20,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:54:20,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:54:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:54:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:54:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 09:54:20,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:54:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 09:54:20,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:54:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [550361364] [2022-07-19 09:54:20,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [550361364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:54:20,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:54:20,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-19 09:54:20,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817377556] [2022-07-19 09:54:20,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:54:20,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:54:20,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:54:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:54:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:54:20,998 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 09:54:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:54:21,235 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-07-19 09:54:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:54:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2022-07-19 09:54:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:54:21,237 INFO L225 Difference]: With dead ends: 64 [2022-07-19 09:54:21,237 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 09:54:21,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:54:21,237 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:54:21,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 118 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:54:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 09:54:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-07-19 09:54:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:54:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-19 09:54:21,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 45 [2022-07-19 09:54:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:54:21,241 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-19 09:54:21,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 09:54:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-19 09:54:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 09:54:21,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:54:21,242 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:54:21,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-19 09:54:21,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:54:21,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:54:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:54:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash -457868326, now seen corresponding path program 5 times [2022-07-19 09:54:21,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:54:21,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490463725] [2022-07-19 09:54:21,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:54:21,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:54:21,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:54:21,458 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:54:21,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-19 09:54:21,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 09:54:21,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:54:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 09:54:21,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:54:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 09:54:21,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:54:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 09:54:21,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-19 09:54:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490463725] [2022-07-19 09:54:21,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490463725] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:54:21,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:54:21,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2022-07-19 09:54:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549297331] [2022-07-19 09:54:21,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:54:21,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:54:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-19 09:54:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:54:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-19 09:54:21,926 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 09:54:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:54:22,468 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-07-19 09:54:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 09:54:22,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2022-07-19 09:54:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:54:22,469 INFO L225 Difference]: With dead ends: 101 [2022-07-19 09:54:22,469 INFO L226 Difference]: Without dead ends: 82 [2022-07-19 09:54:22,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2022-07-19 09:54:22,470 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 137 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:54:22,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 136 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:54:22,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-19 09:54:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 58. [2022-07-19 09:54:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-19 09:54:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-07-19 09:54:22,480 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 49 [2022-07-19 09:54:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:54:22,480 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-07-19 09:54:22,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 09:54:22,480 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-07-19 09:54:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 09:54:22,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:54:22,481 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:54:22,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-19 09:54:22,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-19 09:54:22,686 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:54:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:54:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash -376141416, now seen corresponding path program 6 times [2022-07-19 09:54:22,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-19 09:54:22,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065145432] [2022-07-19 09:54:22,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:54:22,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-19 09:54:22,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-19 09:54:22,688 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-19 09:54:22,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-19 09:54:22,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-19 09:54:22,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:54:22,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 09:54:22,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:54:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:23,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:23,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:23,439 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:54:23,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2022-07-19 09:54:23,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:54:23,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:54:23,840 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-07-19 09:54:23,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2022-07-19 09:54:24,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:24,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:24,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:24,052 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:54:24,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2022-07-19 09:54:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:24,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:54:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:24,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:54:24,211 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:54:24,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-07-19 09:54:24,631 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:54:24,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 34 [2022-07-19 09:54:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-19 09:54:24,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:54:33,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 159 [2022-07-19 09:54:33,580 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-07-19 09:54:33,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7548080 treesize of output 4871344 [2022-07-19 09:57:43,138 WARN L233 SmtUtils]: Spent 3.16m on a formula simplification. DAG size of input: 376 DAG size of output: 376 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)