./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/compact.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/compact.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d10d95a54341c7b47811ab25537e4a8b7826e1d784f7f9e824b4bec58f961228 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:54:09,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:54:09,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:54:09,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:54:09,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:54:09,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:54:09,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:54:09,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:54:09,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:54:09,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:54:09,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:54:09,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:54:09,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:54:09,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:54:09,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:54:09,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:54:09,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:54:09,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:54:09,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:54:09,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:54:09,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:54:09,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:54:09,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:54:09,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:54:09,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:54:09,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:54:09,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:54:09,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:54:09,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:54:09,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:54:09,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:54:09,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:54:09,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:54:09,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:54:09,817 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:54:09,817 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:54:09,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:54:09,818 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:54:09,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:54:09,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:54:09,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:54:09,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:54:09,848 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:54:09,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:54:09,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:54:09,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:54:09,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:54:09,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:54:09,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:54:09,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:54:09,851 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:54:09,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:54:09,852 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:54:09,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:54:09,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:54:09,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:54:09,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:54:09,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:54:09,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:54:09,853 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:54:09,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:54:09,853 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:54:09,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:54:09,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:54:09,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:54:09,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:54:09,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:54:09,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:54:09,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:54:09,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:54:09,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:54:09,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:54:09,855 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:54:09,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:54:09,856 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:54:09,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:54:09,856 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:54:09,856 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10d95a54341c7b47811ab25537e4a8b7826e1d784f7f9e824b4bec58f961228 [2023-02-15 19:54:10,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:54:10,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:54:10,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:54:10,057 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:54:10,057 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:54:10,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/compact.c [2023-02-15 19:54:11,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:54:11,196 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:54:11,196 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/compact.c [2023-02-15 19:54:11,202 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef86ec78/60719489a7304427b284e8c124cca783/FLAGb39bc6074 [2023-02-15 19:54:11,212 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef86ec78/60719489a7304427b284e8c124cca783 [2023-02-15 19:54:11,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:54:11,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:54:11,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:54:11,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:54:11,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:54:11,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@437454ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11, skipping insertion in model container [2023-02-15 19:54:11,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:54:11,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:54:11,330 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/compact.c[609,622] [2023-02-15 19:54:11,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:54:11,341 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:54:11,352 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/compact.c[609,622] [2023-02-15 19:54:11,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:54:11,365 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:54:11,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11 WrapperNode [2023-02-15 19:54:11,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:54:11,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:54:11,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:54:11,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:54:11,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,393 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-02-15 19:54:11,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:54:11,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:54:11,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:54:11,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:54:11,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,416 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:54:11,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:54:11,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:54:11,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:54:11,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (1/1) ... [2023-02-15 19:54:11,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:54:11,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:54:11,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 19:54:11,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 19:54:11,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 19:54:11,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:54:11,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:54:11,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:54:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 19:54:11,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:54:11,529 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:54:11,530 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:54:11,613 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:54:11,617 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:54:11,617 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 19:54:11,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:54:11 BoogieIcfgContainer [2023-02-15 19:54:11,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:54:11,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:54:11,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:54:11,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:54:11,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:54:11" (1/3) ... [2023-02-15 19:54:11,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a303e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:54:11, skipping insertion in model container [2023-02-15 19:54:11,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:54:11" (2/3) ... [2023-02-15 19:54:11,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a303e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:54:11, skipping insertion in model container [2023-02-15 19:54:11,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:54:11" (3/3) ... [2023-02-15 19:54:11,635 INFO L112 eAbstractionObserver]: Analyzing ICFG compact.c [2023-02-15 19:54:11,646 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:54:11,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:54:11,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:54:11,707 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@ef0e3c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:54:11,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:54:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 19:54:11,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:54:11,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 19:54:11,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:54:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:54:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash 889605485, now seen corresponding path program 1 times [2023-02-15 19:54:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:54:11,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611033733] [2023-02-15 19:54:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:54:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:54:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:54:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:54:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:54:11,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611033733] [2023-02-15 19:54:11,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611033733] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:54:11,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:54:11,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 19:54:11,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695569514] [2023-02-15 19:54:11,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:54:11,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 19:54:11,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:54:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 19:54:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:54:11,865 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:54:11,876 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2023-02-15 19:54:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 19:54:11,878 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 19:54:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:54:11,883 INFO L225 Difference]: With dead ends: 22 [2023-02-15 19:54:11,883 INFO L226 Difference]: Without dead ends: 10 [2023-02-15 19:54:11,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 19:54:11,891 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:54:11,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:54:11,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-15 19:54:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-15 19:54:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-15 19:54:11,920 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2023-02-15 19:54:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:54:11,921 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-15 19:54:11,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-15 19:54:11,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 19:54:11,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:54:11,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 19:54:11,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 19:54:11,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:54:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:54:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash 889605144, now seen corresponding path program 1 times [2023-02-15 19:54:11,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:54:11,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933980420] [2023-02-15 19:54:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:54:11,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:54:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:54:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 19:54:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:54:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933980420] [2023-02-15 19:54:12,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933980420] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:54:12,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:54:12,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 19:54:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921280816] [2023-02-15 19:54:12,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:54:12,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:54:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:54:12,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:54:12,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:54:12,030 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:54:12,047 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-02-15 19:54:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:54:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 19:54:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:54:12,048 INFO L225 Difference]: With dead ends: 21 [2023-02-15 19:54:12,048 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 19:54:12,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:54:12,050 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:54:12,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:54:12,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 19:54:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2023-02-15 19:54:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-02-15 19:54:12,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2023-02-15 19:54:12,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:54:12,053 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-02-15 19:54:12,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:12,054 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-02-15 19:54:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 19:54:12,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:54:12,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:54:12,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 19:54:12,055 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:54:12,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:54:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1566455322, now seen corresponding path program 1 times [2023-02-15 19:54:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:54:12,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407984620] [2023-02-15 19:54:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:54:12,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:54:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:54:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:54:12,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:54:12,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407984620] [2023-02-15 19:54:12,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407984620] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:54:12,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344642200] [2023-02-15 19:54:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:54:12,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:54:12,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:54:12,152 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) [2023-02-15 19:54:12,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:54:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:54:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 19:54:12,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:54:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:54:12,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:54:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 19:54:12,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344642200] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:54:12,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:54:12,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 19:54:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514502216] [2023-02-15 19:54:12,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:54:12,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 19:54:12,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:54:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 19:54:12,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:54:12,298 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:54:12,377 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-02-15 19:54:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:54:12,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 19:54:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:54:12,378 INFO L225 Difference]: With dead ends: 34 [2023-02-15 19:54:12,379 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 19:54:12,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:54:12,380 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:54:12,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:54:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 19:54:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-15 19:54:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-02-15 19:54:12,390 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 11 [2023-02-15 19:54:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:54:12,390 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-02-15 19:54:12,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-02-15 19:54:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 19:54:12,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:54:12,391 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-15 19:54:12,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 19:54:12,597 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 [2023-02-15 19:54:12,597 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:54:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:54:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash -463491552, now seen corresponding path program 2 times [2023-02-15 19:54:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:54:12,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249047008] [2023-02-15 19:54:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:54:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:54:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:54:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-15 19:54:12,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:54:12,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249047008] [2023-02-15 19:54:12,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249047008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:54:12,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815139092] [2023-02-15 19:54:12,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:54:12,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:54:12,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:54:12,854 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) [2023-02-15 19:54:12,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:54:12,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:54:12,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:54:12,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 19:54:12,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:54:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:54:12,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:54:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 19:54:13,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815139092] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:54:13,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:54:13,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 19:54:13,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597389103] [2023-02-15 19:54:13,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:54:13,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 19:54:13,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:54:13,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 19:54:13,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:54:13,043 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:54:13,304 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2023-02-15 19:54:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 19:54:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-15 19:54:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:54:13,305 INFO L225 Difference]: With dead ends: 73 [2023-02-15 19:54:13,305 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 19:54:13,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-02-15 19:54:13,306 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:54:13,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:54:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 19:54:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-15 19:54:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-15 19:54:13,314 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 26 [2023-02-15 19:54:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:54:13,315 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-15 19:54:13,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-15 19:54:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 19:54:13,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:54:13,316 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-15 19:54:13,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 19:54:13,521 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 [2023-02-15 19:54:13,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:54:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:54:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash -719637204, now seen corresponding path program 3 times [2023-02-15 19:54:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:54:13,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102284761] [2023-02-15 19:54:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:54:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:54:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:54:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-15 19:54:13,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:54:13,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102284761] [2023-02-15 19:54:13,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102284761] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:54:13,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514908810] [2023-02-15 19:54:13,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 19:54:13,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:54:13,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:54:13,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:54:13,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 19:54:15,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-02-15 19:54:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:54:15,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 19:54:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:54:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-15 19:54:15,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:54:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-15 19:54:16,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514908810] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:54:16,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:54:16,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 19:54:16,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812084190] [2023-02-15 19:54:16,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:54:16,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 19:54:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:54:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 19:54:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-02-15 19:54:16,217 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:54:20,410 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2023-02-15 19:54:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 19:54:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-15 19:54:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:54:20,412 INFO L225 Difference]: With dead ends: 151 [2023-02-15 19:54:20,412 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 19:54:20,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 19:54:20,413 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 250 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:54:20,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 168 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 19:54:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 19:54:20,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-02-15 19:54:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-02-15 19:54:20,427 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 56 [2023-02-15 19:54:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:54:20,427 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-02-15 19:54:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:54:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-02-15 19:54:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-15 19:54:20,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:54:20,431 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-02-15 19:54:20,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 19:54:20,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:54:20,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:54:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:54:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash -604959932, now seen corresponding path program 4 times [2023-02-15 19:54:20,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:54:20,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631359768] [2023-02-15 19:54:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:54:20,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:54:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:54:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-15 19:54:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:54:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631359768] [2023-02-15 19:54:21,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631359768] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:54:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894179258] [2023-02-15 19:54:21,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 19:54:21,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:54:21,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:54:21,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:54:21,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 19:54:21,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 19:54:21,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:54:21,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 19:54:21,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:54:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-15 19:54:21,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:54:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-15 19:54:22,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894179258] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:54:22,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:54:22,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-15 19:54:22,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820335442] [2023-02-15 19:54:22,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:54:22,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 19:54:22,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:54:22,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 19:54:22,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 19:54:22,708 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:55:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:55:58,517 INFO L93 Difference]: Finished difference Result 307 states and 356 transitions. [2023-02-15 19:55:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-15 19:55:58,517 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-02-15 19:55:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:55:58,519 INFO L225 Difference]: With dead ends: 307 [2023-02-15 19:55:58,519 INFO L226 Difference]: Without dead ends: 237 [2023-02-15 19:55:58,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 95.2s TimeCoverageRelationStatistics Valid=1745, Invalid=3222, Unknown=3, NotChecked=0, Total=4970 [2023-02-15 19:55:58,521 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 661 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 19:55:58,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 617 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 2286 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 19:55:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-02-15 19:55:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-02-15 19:55:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:55:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2023-02-15 19:55:58,538 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 116 [2023-02-15 19:55:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:55:58,538 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2023-02-15 19:55:58,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 19:55:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2023-02-15 19:55:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-02-15 19:55:58,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:55:58,540 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2023-02-15 19:55:58,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 19:55:58,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:55:58,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:55:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:55:58,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1658529932, now seen corresponding path program 5 times [2023-02-15 19:55:58,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:55:58,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051291147] [2023-02-15 19:55:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:55:58,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:55:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:56:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-02-15 19:56:01,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:56:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051291147] [2023-02-15 19:56:01,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051291147] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:56:01,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674751278] [2023-02-15 19:56:01,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 19:56:01,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:56:01,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:56:01,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 19:56:01,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process