./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum2.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 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:06:50,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:06:50,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:06:50,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:06:50,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:06:50,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:06:50,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:06:50,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:06:50,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:06:50,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:06:50,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:06:50,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:06:50,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:06:50,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:06:50,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:06:50,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:06:50,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:06:50,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:06:50,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:06:50,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:06:50,384 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:06:50,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:06:50,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:06:50,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:06:50,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:06:50,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:06:50,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:06:50,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:06:50,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:06:50,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:06:50,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:06:50,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:06:50,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:06:50,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:06:50,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:06:50,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:06:50,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:06:50,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:06:50,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:06:50,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:06:50,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:06:50,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:06:50,412 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:06:50,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:06:50,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:06:50,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:06:50,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:06:50,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:06:50,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:06:50,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:06:50,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:06:50,436 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:06:50,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:06:50,436 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:06:50,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:06:50,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:06:50,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:06:50,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:06:50,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:06:50,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:06:50,438 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:06:50,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:06:50,438 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:06:50,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:06:50,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:06:50,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:06:50,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:06:50,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:06:50,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:06:50,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:06:50,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:06:50,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:06:50,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:06:50,440 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:06:50,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:06:50,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:06:50,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a [2022-07-22 10:06:50,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:06:50,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:06:50,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:06:50,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:06:50,707 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:06:50,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum2.c [2022-07-22 10:06:50,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2875bdf7/8d8b0e2efc404f96bdda0e8bb6eb5cd4/FLAG645cbab48 [2022-07-22 10:06:51,196 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:06:51,197 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum2.c [2022-07-22 10:06:51,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2875bdf7/8d8b0e2efc404f96bdda0e8bb6eb5cd4/FLAG645cbab48 [2022-07-22 10:06:51,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2875bdf7/8d8b0e2efc404f96bdda0e8bb6eb5cd4 [2022-07-22 10:06:51,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:06:51,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:06:51,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:06:51,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:06:51,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:06:51,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b50fd1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51, skipping insertion in model container [2022-07-22 10:06:51,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:06:51,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:06:51,750 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/zero_sum2.c[400,413] [2022-07-22 10:06:51,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:06:51,788 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:06:51,805 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/zero_sum2.c[400,413] [2022-07-22 10:06:51,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:06:51,825 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:06:51,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51 WrapperNode [2022-07-22 10:06:51,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:06:51,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:06:51,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:06:51,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:06:51,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,861 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-07-22 10:06:51,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:06:51,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:06:51,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:06:51,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:06:51,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:06:51,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:06:51,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:06:51,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:06:51,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (1/1) ... [2022-07-22 10:06:51,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:06:51,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:06:51,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 10:06:51,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 10:06:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:06:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:06:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:06:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:06:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:06:51,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:06:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:06:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:06:52,012 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:06:52,013 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:06:52,122 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:06:52,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:06:52,129 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-22 10:06:52,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:06:52 BoogieIcfgContainer [2022-07-22 10:06:52,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:06:52,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:06:52,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:06:52,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:06:52,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:06:51" (1/3) ... [2022-07-22 10:06:52,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a8e23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:06:52, skipping insertion in model container [2022-07-22 10:06:52,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:06:51" (2/3) ... [2022-07-22 10:06:52,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a8e23e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:06:52, skipping insertion in model container [2022-07-22 10:06:52,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:06:52" (3/3) ... [2022-07-22 10:06:52,139 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2022-07-22 10:06:52,152 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:06:52,152 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:06:52,193 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:06:52,199 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@343eecd5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@142a9fad [2022-07-22 10:06:52,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:06:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 10:06:52,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:06:52,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:06:52,225 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:06:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:06:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2022-07-22 10:06:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:06:52,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929621786] [2022-07-22 10:06:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:06:52,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:06:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:06:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:06:52,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:06:52,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929621786] [2022-07-22 10:06:52,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929621786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:06:52,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:06:52,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:06:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193571654] [2022-07-22 10:06:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:06:52,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:06:52,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:06:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:06:52,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:06:52,474 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:06:52,493 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-07-22 10:06:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:06:52,496 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), 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 15 [2022-07-22 10:06:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:06:52,503 INFO L225 Difference]: With dead ends: 47 [2022-07-22 10:06:52,503 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 10:06:52,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:06:52,522 INFO L413 NwaCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:06:52,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:06:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 10:06:52,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 10:06:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-22 10:06:52,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2022-07-22 10:06:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:06:52,559 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-22 10:06:52,560 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-22 10:06:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 10:06:52,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:06:52,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:06:52,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:06:52,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:06:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:06:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2022-07-22 10:06:52,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:06:52,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410783241] [2022-07-22 10:06:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:06:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:06:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:06:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:06:52,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:06:52,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410783241] [2022-07-22 10:06:52,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410783241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:06:52,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:06:52,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 10:06:52,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257199605] [2022-07-22 10:06:52,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:06:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:06:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:06:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:06:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:06:52,651 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:06:52,678 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-22 10:06:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:06:52,679 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), 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 15 [2022-07-22 10:06:52,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:06:52,680 INFO L225 Difference]: With dead ends: 39 [2022-07-22 10:06:52,680 INFO L226 Difference]: Without dead ends: 23 [2022-07-22 10:06:52,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:06:52,681 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:06:52,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:06:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-22 10:06:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-22 10:06:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-22 10:06:52,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-07-22 10:06:52,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:06:52,693 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-22 10:06:52,693 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-22 10:06:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 10:06:52,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:06:52,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:06:52,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:06:52,694 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:06:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:06:52,694 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2022-07-22 10:06:52,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:06:52,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034155176] [2022-07-22 10:06:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:06:52,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:06:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:06:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:06:52,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:06:52,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034155176] [2022-07-22 10:06:52,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034155176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:06:52,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:06:52,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:06:52,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685116417] [2022-07-22 10:06:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:06:52,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:06:52,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:06:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:06:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:06:52,797 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:06:52,863 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-07-22 10:06:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:06:52,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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) Word has length 17 [2022-07-22 10:06:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:06:52,865 INFO L225 Difference]: With dead ends: 43 [2022-07-22 10:06:52,865 INFO L226 Difference]: Without dead ends: 30 [2022-07-22 10:06:52,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:06:52,866 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:06:52,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:06:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-22 10:06:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-22 10:06:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-22 10:06:52,873 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-22 10:06:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:06:52,873 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-22 10:06:52,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-22 10:06:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 10:06:52,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:06:52,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:06:52,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 10:06:52,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:06:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:06:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2022-07-22 10:06:52,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:06:52,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950449427] [2022-07-22 10:06:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:06:52,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:06:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:06:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:06:52,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:06:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950449427] [2022-07-22 10:06:52,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950449427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:06:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569993797] [2022-07-22 10:06:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:06:52,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:06:52,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:06:52,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:06:52,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:06:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:06:53,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:06:53,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:06:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:06:53,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:06:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:06:53,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569993797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:06:53,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:06:53,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 10:06:53,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531663397] [2022-07-22 10:06:53,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:06:53,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 10:06:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:06:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 10:06:53,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:06:53,116 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:53,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:06:53,149 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-22 10:06:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 10:06:53,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 10:06:53,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:06:53,150 INFO L225 Difference]: With dead ends: 49 [2022-07-22 10:06:53,150 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 10:06:53,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:06:53,152 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:06:53,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:06:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 10:06:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-22 10:06:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-22 10:06:53,158 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2022-07-22 10:06:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:06:53,158 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-22 10:06:53,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-22 10:06:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 10:06:53,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:06:53,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:06:53,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:06:53,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:06:53,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:06:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:06:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2022-07-22 10:06:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:06:53,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41412495] [2022-07-22 10:06:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:06:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:06:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:06:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:06:53,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:06:53,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41412495] [2022-07-22 10:06:53,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41412495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:06:53,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487502953] [2022-07-22 10:06:53,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:06:53,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:06:53,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:06:53,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:06:53,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:06:53,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:06:53,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:06:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:06:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:06:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:06:53,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:06:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:06:53,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487502953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:06:53,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:06:53,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-22 10:06:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292814250] [2022-07-22 10:06:53,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:06:53,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 10:06:53,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:06:53,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 10:06:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:06:53,687 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:06:53,790 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-22 10:06:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 10:06:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 10:06:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:06:53,794 INFO L225 Difference]: With dead ends: 56 [2022-07-22 10:06:53,794 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 10:06:53,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:06:53,799 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:06:53,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:06:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 10:06:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-07-22 10:06:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-07-22 10:06:53,806 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-07-22 10:06:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:06:53,807 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-07-22 10:06:53,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:06:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-07-22 10:06:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 10:06:53,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:06:53,808 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:06:53,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:06:54,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:06:54,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:06:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:06:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2022-07-22 10:06:54,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:06:54,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342523351] [2022-07-22 10:06:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:06:54,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:06:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:06:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:06:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:06:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342523351] [2022-07-22 10:06:55,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342523351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:06:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700969032] [2022-07-22 10:06:55,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:06:55,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:06:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:06:55,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:06:55,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:06:55,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 10:06:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:06:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 10:06:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:06:56,284 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:06:56,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 16 [2022-07-22 10:06:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:06:56,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:06:58,724 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:06:58,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 93 [2022-07-22 10:06:59,188 INFO L356 Elim1Store]: treesize reduction 76, result has 10.6 percent of original size [2022-07-22 10:06:59,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 18 [2022-07-22 10:06:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:06:59,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700969032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:06:59,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:06:59,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 28] total 63 [2022-07-22 10:06:59,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444960733] [2022-07-22 10:06:59,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:06:59,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 10:06:59,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:06:59,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 10:06:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3507, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 10:06:59,582 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 63 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 63 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:01,724 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2022-07-22 10:07:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 10:07:01,724 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 63 states have internal predecessors, (97), 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 35 [2022-07-22 10:07:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:01,726 INFO L225 Difference]: With dead ends: 99 [2022-07-22 10:07:01,726 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 10:07:01,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 23 SyntacticMatches, 16 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=786, Invalid=7046, Unknown=0, NotChecked=0, Total=7832 [2022-07-22 10:07:01,731 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:01,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 117 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 453 Invalid, 0 Unknown, 688 Unchecked, 0.3s Time] [2022-07-22 10:07:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 10:07:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2022-07-22 10:07:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.1875) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-07-22 10:07:01,746 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 35 [2022-07-22 10:07:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:01,747 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-07-22 10:07:01,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 63 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-07-22 10:07:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 10:07:01,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:01,749 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:01,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 10:07:01,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:01,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2022-07-22 10:07:01,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:01,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737994604] [2022-07-22 10:07:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:01,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:07:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:02,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737994604] [2022-07-22 10:07:02,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737994604] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549909381] [2022-07-22 10:07:02,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:07:02,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:02,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:02,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:02,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:07:02,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:07:02,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:07:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:07:02,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:07:02,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549909381] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:02,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:02,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 10:07:02,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31526253] [2022-07-22 10:07:02,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:02,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:07:02,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:07:02,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:07:02,229 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:02,380 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-07-22 10:07:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:07:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-22 10:07:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:02,382 INFO L225 Difference]: With dead ends: 113 [2022-07-22 10:07:02,382 INFO L226 Difference]: Without dead ends: 65 [2022-07-22 10:07:02,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-22 10:07:02,383 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:02,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:07:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-22 10:07:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-22 10:07:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-07-22 10:07:02,394 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 37 [2022-07-22 10:07:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:02,394 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-07-22 10:07:02,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-07-22 10:07:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 10:07:02,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:02,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:02,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:02,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:02,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:02,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 5 times [2022-07-22 10:07:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:02,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442519271] [2022-07-22 10:07:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:02,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:07:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442519271] [2022-07-22 10:07:02,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442519271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833748594] [2022-07-22 10:07:02,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:07:02,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:02,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:02,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:02,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:07:02,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 10:07:02,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:07:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:07:02,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 10:07:02,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833748594] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:02,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:02,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 10:07:02,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110671170] [2022-07-22 10:07:02,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:02,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:07:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:07:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:07:02,880 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:03,006 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2022-07-22 10:07:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 10:07:03,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 10:07:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:03,007 INFO L225 Difference]: With dead ends: 99 [2022-07-22 10:07:03,008 INFO L226 Difference]: Without dead ends: 62 [2022-07-22 10:07:03,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:07:03,009 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:03,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 29 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:07:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-22 10:07:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-07-22 10:07:03,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-22 10:07:03,016 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2022-07-22 10:07:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:03,016 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-22 10:07:03,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-22 10:07:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 10:07:03,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:03,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:03,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 10:07:03,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:03,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2022-07-22 10:07:03,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:03,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540761300] [2022-07-22 10:07:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:03,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:07:04,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:04,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540761300] [2022-07-22 10:07:04,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540761300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:04,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664251909] [2022-07-22 10:07:04,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:07:04,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:04,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:04,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:04,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:07:04,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-22 10:07:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:04,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 10:07:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:07:05,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:07,933 INFO L356 Elim1Store]: treesize reduction 87, result has 57.8 percent of original size [2022-07-22 10:07:07,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 130 [2022-07-22 10:07:08,506 INFO L356 Elim1Store]: treesize reduction 193, result has 6.3 percent of original size [2022-07-22 10:07:08,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 23 [2022-07-22 10:07:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:07:08,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664251909] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:08,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:08,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 27, 26] total 73 [2022-07-22 10:07:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542249723] [2022-07-22 10:07:08,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:08,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-22 10:07:08,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:08,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-22 10:07:08,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=4822, Unknown=1, NotChecked=0, Total=5256 [2022-07-22 10:07:08,835 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 73 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:10,445 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-07-22 10:07:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 10:07:10,446 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 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 45 [2022-07-22 10:07:10,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:10,447 INFO L225 Difference]: With dead ends: 81 [2022-07-22 10:07:10,447 INFO L226 Difference]: Without dead ends: 77 [2022-07-22 10:07:10,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 45 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3228 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=780, Invalid=7775, Unknown=1, NotChecked=0, Total=8556 [2022-07-22 10:07:10,449 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:10,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 101 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1356 Invalid, 0 Unknown, 78 Unchecked, 0.7s Time] [2022-07-22 10:07:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-22 10:07:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-07-22 10:07:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-07-22 10:07:10,459 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2022-07-22 10:07:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:10,459 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-07-22 10:07:10,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-07-22 10:07:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 10:07:10,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:10,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:10,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:10,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:10,676 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2022-07-22 10:07:10,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:10,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927012315] [2022-07-22 10:07:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:07:10,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:10,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927012315] [2022-07-22 10:07:10,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927012315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:10,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226252538] [2022-07-22 10:07:10,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:07:10,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:10,770 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:10,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:07:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:07:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:07:10,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 10:07:10,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226252538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:10,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:10,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:07:10,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846336645] [2022-07-22 10:07:10,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:10,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:07:10,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:07:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:07:10,981 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:11,141 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2022-07-22 10:07:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:07:11,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 47 [2022-07-22 10:07:11,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:11,142 INFO L225 Difference]: With dead ends: 132 [2022-07-22 10:07:11,142 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 10:07:11,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:07:11,145 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:11,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:07:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 10:07:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-07-22 10:07:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2022-07-22 10:07:11,162 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2022-07-22 10:07:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:11,162 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2022-07-22 10:07:11,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2022-07-22 10:07:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 10:07:11,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:11,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:11,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:11,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:11,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:11,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2022-07-22 10:07:11,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:11,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609137238] [2022-07-22 10:07:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:11,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:07:11,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:11,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609137238] [2022-07-22 10:07:11,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609137238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:11,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293107125] [2022-07-22 10:07:11,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:07:11,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:11,444 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:11,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:07:11,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:07:11,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:07:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:07:11,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 10:07:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293107125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:11,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:11,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:07:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164687836] [2022-07-22 10:07:11,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:11,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:07:11,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:11,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:07:11,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:07:11,612 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:11,799 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-07-22 10:07:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 10:07:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 49 [2022-07-22 10:07:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:11,800 INFO L225 Difference]: With dead ends: 101 [2022-07-22 10:07:11,800 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 10:07:11,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:07:11,801 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:11,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 31 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:07:11,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 10:07:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-07-22 10:07:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-07-22 10:07:11,811 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2022-07-22 10:07:11,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:11,811 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-07-22 10:07:11,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-07-22 10:07:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 10:07:11,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:11,815 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:11,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:12,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 10:07:12,015 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:12,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:12,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2022-07-22 10:07:12,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:12,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386525771] [2022-07-22 10:07:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:12,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:07:13,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386525771] [2022-07-22 10:07:13,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386525771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:13,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723412724] [2022-07-22 10:07:13,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:07:13,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:13,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:13,778 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:13,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:07:13,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 10:07:13,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-22 10:07:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:13,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:07:16,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:16,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:07:16,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:07:16,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:16,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:16,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:16,286 INFO L356 Elim1Store]: treesize reduction 102, result has 59.0 percent of original size [2022-07-22 10:07:16,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 125 treesize of output 171 [2022-07-22 10:07:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:07:16,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:07:20,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723412724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:20,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:20,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 26, 23] total 83 [2022-07-22 10:07:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76273490] [2022-07-22 10:07:20,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:20,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-22 10:07:20,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-22 10:07:20,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=6343, Unknown=0, NotChecked=0, Total=6806 [2022-07-22 10:07:20,592 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 83 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 83 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:24,729 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-07-22 10:07:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 10:07:24,729 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 83 states have internal predecessors, (146), 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 55 [2022-07-22 10:07:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:24,730 INFO L225 Difference]: With dead ends: 92 [2022-07-22 10:07:24,730 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 10:07:24,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 56 SyntacticMatches, 16 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1064, Invalid=14686, Unknown=0, NotChecked=0, Total=15750 [2022-07-22 10:07:24,733 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:24,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 167 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 815 Invalid, 0 Unknown, 616 Unchecked, 0.4s Time] [2022-07-22 10:07:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 10:07:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2022-07-22 10:07:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2022-07-22 10:07:24,745 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2022-07-22 10:07:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:24,746 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2022-07-22 10:07:24,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 83 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2022-07-22 10:07:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 10:07:24,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:24,747 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:24,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:24,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:24,967 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:24,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2022-07-22 10:07:24,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:24,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392887256] [2022-07-22 10:07:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:24,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:07:25,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:25,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392887256] [2022-07-22 10:07:25,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392887256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:25,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114537283] [2022-07-22 10:07:25,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:07:25,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:25,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:25,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:25,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 10:07:25,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:07:25,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:07:25,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:07:25,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-22 10:07:25,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114537283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:25,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:25,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 10:07:25,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852084280] [2022-07-22 10:07:25,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:25,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 10:07:25,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:25,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 10:07:25,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:07:25,309 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:25,496 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2022-07-22 10:07:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 10:07:25,497 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 57 [2022-07-22 10:07:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:25,497 INFO L225 Difference]: With dead ends: 160 [2022-07-22 10:07:25,497 INFO L226 Difference]: Without dead ends: 84 [2022-07-22 10:07:25,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:07:25,498 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:25,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 71 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:07:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-22 10:07:25,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-07-22 10:07:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:25,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-07-22 10:07:25,510 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 57 [2022-07-22 10:07:25,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:25,510 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-07-22 10:07:25,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-07-22 10:07:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 10:07:25,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:25,511 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:25,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:25,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 10:07:25,715 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash -801227688, now seen corresponding path program 11 times [2022-07-22 10:07:25,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:25,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702758198] [2022-07-22 10:07:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:25,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:07:25,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702758198] [2022-07-22 10:07:25,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702758198] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394991211] [2022-07-22 10:07:25,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:07:25,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:25,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:25,808 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:25,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 10:07:25,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 10:07:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:07:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:07:26,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-22 10:07:26,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394991211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:26,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:26,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 10:07:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112105309] [2022-07-22 10:07:26,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:26,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 10:07:26,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 10:07:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:07:26,091 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:26,279 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2022-07-22 10:07:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 10:07:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 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 59 [2022-07-22 10:07:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:26,280 INFO L225 Difference]: With dead ends: 119 [2022-07-22 10:07:26,280 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 10:07:26,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2022-07-22 10:07:26,282 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:26,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 36 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:07:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 10:07:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-07-22 10:07:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-22 10:07:26,289 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2022-07-22 10:07:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:26,290 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-22 10:07:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-22 10:07:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 10:07:26,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:26,290 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:26,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-22 10:07:26,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 10:07:26,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:26,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2022-07-22 10:07:26,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:26,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443581474] [2022-07-22 10:07:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:07:28,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:28,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443581474] [2022-07-22 10:07:28,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443581474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:28,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449340838] [2022-07-22 10:07:28,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:07:28,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:28,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:28,680 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:28,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 10:07:28,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 10:07:28,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:28,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 102 conjunts are in the unsatisfiable core [2022-07-22 10:07:28,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:32,857 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:07:32,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 23 [2022-07-22 10:07:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:07:33,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:38,965 INFO L356 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2022-07-22 10:07:38,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 88 treesize of output 286 [2022-07-22 10:07:39,688 INFO L356 Elim1Store]: treesize reduction 589, result has 10.5 percent of original size [2022-07-22 10:07:39,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 83 [2022-07-22 10:07:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:07:39,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449340838] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:39,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:39,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 33, 28] total 102 [2022-07-22 10:07:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275126030] [2022-07-22 10:07:39,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-07-22 10:07:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-07-22 10:07:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=9710, Unknown=1, NotChecked=0, Total=10302 [2022-07-22 10:07:39,968 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 102 states, 102 states have (on average 1.696078431372549) internal successors, (173), 102 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:45,270 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-07-22 10:07:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 10:07:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.696078431372549) internal successors, (173), 102 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-22 10:07:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:45,271 INFO L225 Difference]: With dead ends: 109 [2022-07-22 10:07:45,271 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 10:07:45,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 70 SyntacticMatches, 13 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6968 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1334, Invalid=21921, Unknown=1, NotChecked=0, Total=23256 [2022-07-22 10:07:45,275 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 939 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:45,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 184 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1319 Invalid, 0 Unknown, 939 Unchecked, 0.7s Time] [2022-07-22 10:07:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 10:07:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2022-07-22 10:07:45,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2022-07-22 10:07:45,286 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2022-07-22 10:07:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:45,287 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2022-07-22 10:07:45,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.696078431372549) internal successors, (173), 102 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2022-07-22 10:07:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 10:07:45,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:45,288 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:45,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:45,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 10:07:45,488 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2022-07-22 10:07:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035207915] [2022-07-22 10:07:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:07:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035207915] [2022-07-22 10:07:45,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035207915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409209940] [2022-07-22 10:07:45,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:07:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:45,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:45,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 10:07:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:45,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:07:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:07:45,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-22 10:07:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409209940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:45,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:07:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876593677] [2022-07-22 10:07:45,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:45,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:07:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:07:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:07:45,934 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:46,173 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2022-07-22 10:07:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 10:07:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-22 10:07:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:46,174 INFO L225 Difference]: With dead ends: 188 [2022-07-22 10:07:46,174 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 10:07:46,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-07-22 10:07:46,175 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:46,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 81 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:07:46,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 10:07:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-07-22 10:07:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-07-22 10:07:46,188 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 67 [2022-07-22 10:07:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:46,188 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-07-22 10:07:46,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:46,189 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-07-22 10:07:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 10:07:46,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:46,190 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:46,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:46,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 10:07:46,395 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash 721627522, now seen corresponding path program 14 times [2022-07-22 10:07:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:46,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515107678] [2022-07-22 10:07:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:07:46,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:46,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515107678] [2022-07-22 10:07:46,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515107678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:46,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738832503] [2022-07-22 10:07:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:07:46,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:46,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:46,516 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:46,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 10:07:46,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:07:46,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:46,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:07:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:07:46,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:07:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-22 10:07:46,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738832503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:07:46,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:07:46,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:07:46,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924214328] [2022-07-22 10:07:46,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:07:46,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:07:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:07:46,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:07:46,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:07:46,775 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:07:47,026 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-07-22 10:07:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 10:07:47,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 10:07:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:07:47,026 INFO L225 Difference]: With dead ends: 137 [2022-07-22 10:07:47,027 INFO L226 Difference]: Without dead ends: 80 [2022-07-22 10:07:47,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2022-07-22 10:07:47,027 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 173 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:07:47,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 35 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:07:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-22 10:07:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-22 10:07:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-07-22 10:07:47,039 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2022-07-22 10:07:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:07:47,039 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-07-22 10:07:47,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:07:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-07-22 10:07:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 10:07:47,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:07:47,040 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:07:47,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 10:07:47,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:47,247 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:07:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:07:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2022-07-22 10:07:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:07:47,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997281075] [2022-07-22 10:07:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:07:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:07:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:07:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:07:50,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:07:50,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997281075] [2022-07-22 10:07:50,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997281075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:07:50,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143630422] [2022-07-22 10:07:50,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:07:50,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:07:50,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:07:50,844 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:07:50,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 10:07:50,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 10:07:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:07:50,938 WARN L261 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-22 10:07:50,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:07:51,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:07:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:07:56,493 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:07:56,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 109 [2022-07-22 10:07:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:07:56,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 10:08:06,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143630422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:06,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:06,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 36, 31] total 115 [2022-07-22 10:08:06,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855117389] [2022-07-22 10:08:06,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:06,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-07-22 10:08:06,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:06,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-07-22 10:08:06,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=902, Invalid=12207, Unknown=1, NotChecked=0, Total=13110 [2022-07-22 10:08:06,258 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 115 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 115 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:14,903 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2022-07-22 10:08:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-22 10:08:14,904 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 115 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 10:08:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:14,904 INFO L225 Difference]: With dead ends: 125 [2022-07-22 10:08:14,904 INFO L226 Difference]: Without dead ends: 121 [2022-07-22 10:08:14,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8636 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=1989, Invalid=29162, Unknown=1, NotChecked=0, Total=31152 [2022-07-22 10:08:14,907 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:14,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 202 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1698 Invalid, 0 Unknown, 897 Unchecked, 1.0s Time] [2022-07-22 10:08:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-22 10:08:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2022-07-22 10:08:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2022-07-22 10:08:14,927 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2022-07-22 10:08:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:14,927 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2022-07-22 10:08:14,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.7043478260869565) internal successors, (196), 115 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2022-07-22 10:08:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 10:08:14,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:14,928 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:14,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 10:08:15,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 10:08:15,129 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash -932406390, now seen corresponding path program 16 times [2022-07-22 10:08:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:15,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544834147] [2022-07-22 10:08:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:08:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544834147] [2022-07-22 10:08:15,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544834147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:15,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429421895] [2022-07-22 10:08:15,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:08:15,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:15,264 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:08:15,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 10:08:15,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:08:15,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:08:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:08:15,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:08:15,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-22 10:08:15,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429421895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:15,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:15,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-22 10:08:15,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889952972] [2022-07-22 10:08:15,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:15,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:08:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:08:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:08:15,640 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:15,925 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2022-07-22 10:08:15,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 10:08:15,925 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 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 77 [2022-07-22 10:08:15,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:15,926 INFO L225 Difference]: With dead ends: 216 [2022-07-22 10:08:15,926 INFO L226 Difference]: Without dead ends: 112 [2022-07-22 10:08:15,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 10:08:15,926 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:15,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 69 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:08:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-22 10:08:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-07-22 10:08:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 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) [2022-07-22 10:08:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2022-07-22 10:08:15,946 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 77 [2022-07-22 10:08:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:15,946 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2022-07-22 10:08:15,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:15,947 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2022-07-22 10:08:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 10:08:15,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:15,947 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:15,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 10:08:16,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:16,164 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:16,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1623823828, now seen corresponding path program 17 times [2022-07-22 10:08:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:16,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69389685] [2022-07-22 10:08:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:16,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:08:16,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:16,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69389685] [2022-07-22 10:08:16,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69389685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:16,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485994817] [2022-07-22 10:08:16,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:08:16,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:16,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:16,295 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:08:16,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 10:08:16,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 10:08:16,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:08:16,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:08:16,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:08:16,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:08:16,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485994817] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:16,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:16,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-22 10:08:16,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847584041] [2022-07-22 10:08:16,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:16,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 10:08:16,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 10:08:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 10:08:16,973 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 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) [2022-07-22 10:08:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:17,365 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-07-22 10:08:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 10:08:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 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 79 [2022-07-22 10:08:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:17,366 INFO L225 Difference]: With dead ends: 155 [2022-07-22 10:08:17,366 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 10:08:17,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 10:08:17,367 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 257 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:17,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 50 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:08:17,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 10:08:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-07-22 10:08:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-07-22 10:08:17,391 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2022-07-22 10:08:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:17,391 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-07-22 10:08:17,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 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) [2022-07-22 10:08:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-07-22 10:08:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 10:08:17,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:17,392 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:17,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 10:08:17,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:17,604 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1053375342, now seen corresponding path program 18 times [2022-07-22 10:08:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:17,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487712450] [2022-07-22 10:08:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:17,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 9 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:08:21,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:21,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487712450] [2022-07-22 10:08:21,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487712450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:21,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073284888] [2022-07-22 10:08:21,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:08:21,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:21,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:21,743 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:08:21,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 10:08:21,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 10:08:21,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:08:21,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 134 conjunts are in the unsatisfiable core [2022-07-22 10:08:21,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:28,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:08:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:08:28,328 INFO L356 Elim1Store]: treesize reduction 176, result has 65.1 percent of original size [2022-07-22 10:08:28,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 30 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 209 treesize of output 360 [2022-07-22 10:08:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 13 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:08:29,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:41,822 INFO L356 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2022-07-22 10:08:41,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 133 treesize of output 331 [2022-07-22 10:08:42,418 INFO L356 Elim1Store]: treesize reduction 1349, result has 9.8 percent of original size [2022-07-22 10:08:42,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 166 [2022-07-22 10:08:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:08:42,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073284888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:42,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:42,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 38, 36] total 134 [2022-07-22 10:08:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138571556] [2022-07-22 10:08:42,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:42,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-07-22 10:08:42,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-07-22 10:08:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=16955, Unknown=0, NotChecked=0, Total=17822 [2022-07-22 10:08:42,878 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 134 states, 134 states have (on average 1.671641791044776) internal successors, (224), 134 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:58,083 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2022-07-22 10:08:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-22 10:08:58,084 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.671641791044776) internal successors, (224), 134 states have internal predecessors, (224), 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 85 [2022-07-22 10:08:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:58,085 INFO L225 Difference]: With dead ends: 140 [2022-07-22 10:08:58,085 INFO L226 Difference]: Without dead ends: 136 [2022-07-22 10:08:58,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 97 SyntacticMatches, 14 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9822 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=2234, Invalid=37966, Unknown=0, NotChecked=0, Total=40200 [2022-07-22 10:08:58,088 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1420 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:58,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1294 Invalid, 0 Unknown, 1420 Unchecked, 0.7s Time] [2022-07-22 10:08:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-22 10:08:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2022-07-22 10:08:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-07-22 10:08:58,108 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 85 [2022-07-22 10:08:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:58,108 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-07-22 10:08:58,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.671641791044776) internal successors, (224), 134 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-07-22 10:08:58,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 10:08:58,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:58,109 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:58,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 10:08:58,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:58,310 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:58,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1371812404, now seen corresponding path program 19 times [2022-07-22 10:08:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:58,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550394173] [2022-07-22 10:08:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 10:08:58,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:58,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550394173] [2022-07-22 10:08:58,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550394173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:58,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282088465] [2022-07-22 10:08:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:08:58,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:58,483 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:08:58,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 10:08:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 10:08:58,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 10:08:58,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-22 10:08:58,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282088465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:58,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:58,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-22 10:08:58,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092469924] [2022-07-22 10:08:58,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:58,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:08:58,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:58,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:08:58,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:08:58,936 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:59,360 INFO L93 Difference]: Finished difference Result 244 states and 258 transitions. [2022-07-22 10:08:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 10:08:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-22 10:08:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:59,369 INFO L225 Difference]: With dead ends: 244 [2022-07-22 10:08:59,369 INFO L226 Difference]: Without dead ends: 126 [2022-07-22 10:08:59,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 10:08:59,374 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:59,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 74 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:08:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-22 10:08:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-07-22 10:08:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.064516129032258) internal successors, (132), 124 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2022-07-22 10:08:59,398 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 87 [2022-07-22 10:08:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:59,399 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2022-07-22 10:08:59,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2022-07-22 10:08:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 10:08:59,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:59,400 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:59,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-22 10:08:59,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:59,619 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1105043030, now seen corresponding path program 20 times [2022-07-22 10:08:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:59,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667916532] [2022-07-22 10:08:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-22 10:08:59,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:59,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667916532] [2022-07-22 10:08:59,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667916532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:59,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247653462] [2022-07-22 10:08:59,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:08:59,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:59,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:59,788 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:08:59,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 10:08:59,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:08:59,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:08:59,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 10:08:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-22 10:09:00,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-22 10:09:00,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247653462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:00,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:00,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-22 10:09:00,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008052122] [2022-07-22 10:09:00,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:00,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:09:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:09:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:09:00,129 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:00,460 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2022-07-22 10:09:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 10:09:00,460 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-07-22 10:09:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:00,461 INFO L225 Difference]: With dead ends: 173 [2022-07-22 10:09:00,461 INFO L226 Difference]: Without dead ends: 100 [2022-07-22 10:09:00,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 10:09:00,462 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 201 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:00,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 30 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:09:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-22 10:09:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-07-22 10:09:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-07-22 10:09:00,479 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2022-07-22 10:09:00,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:00,479 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-07-22 10:09:00,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:00,479 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-07-22 10:09:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 10:09:00,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:00,480 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:00,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:00,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-22 10:09:00,689 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 238506300, now seen corresponding path program 21 times [2022-07-22 10:09:00,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:00,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674453008] [2022-07-22 10:09:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:00,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 4 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:06,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:06,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674453008] [2022-07-22 10:09:06,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674453008] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:06,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265729513] [2022-07-22 10:09:06,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:09:06,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:06,730 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:09:06,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 10:09:06,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 10:09:06,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:06,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 156 conjunts are in the unsatisfiable core [2022-07-22 10:09:06,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:09:16,706 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:09:16,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 175 [2022-07-22 10:09:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 295 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:09:17,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:37,794 INFO L356 Elim1Store]: treesize reduction 1329, result has 30.3 percent of original size [2022-07-22 10:09:37,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 148 treesize of output 598 [2022-07-22 10:09:40,179 INFO L356 Elim1Store]: treesize reduction 1677, result has 12.0 percent of original size [2022-07-22 10:09:40,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 147 treesize of output 249 [2022-07-22 10:09:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 10:09:40,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265729513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:40,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:40,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 45, 40] total 148 [2022-07-22 10:09:40,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118529038] [2022-07-22 10:09:40,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:40,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-07-22 10:09:40,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:40,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-07-22 10:09:40,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1369, Invalid=20386, Unknown=1, NotChecked=0, Total=21756 [2022-07-22 10:09:40,770 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 148 states, 148 states have (on average 1.662162162162162) internal successors, (246), 148 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:55,469 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2022-07-22 10:09:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-22 10:09:55,469 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.662162162162162) internal successors, (246), 148 states have internal predecessors, (246), 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 95 [2022-07-22 10:09:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:55,470 INFO L225 Difference]: With dead ends: 157 [2022-07-22 10:09:55,470 INFO L226 Difference]: Without dead ends: 153 [2022-07-22 10:09:55,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 109 SyntacticMatches, 20 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13645 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=2954, Invalid=47895, Unknown=1, NotChecked=0, Total=50850 [2022-07-22 10:09:55,473 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:55,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 251 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2323 Invalid, 0 Unknown, 1427 Unchecked, 1.3s Time] [2022-07-22 10:09:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-22 10:09:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2022-07-22 10:09:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2022-07-22 10:09:55,500 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 95 [2022-07-22 10:09:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:55,500 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2022-07-22 10:09:55,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.662162162162162) internal successors, (246), 148 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2022-07-22 10:09:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 10:09:55,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:55,502 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:55,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:55,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 10:09:55,715 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:55,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:55,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1624521822, now seen corresponding path program 22 times [2022-07-22 10:09:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:55,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238728381] [2022-07-22 10:09:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:55,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 10:09:55,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:55,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238728381] [2022-07-22 10:09:55,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238728381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:55,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020483185] [2022-07-22 10:09:55,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:09:55,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:55,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:55,884 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:09:55,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 10:09:55,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:09:55,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:55,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 10:09:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 10:09:56,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 10:09:56,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020483185] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:56,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:56,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-22 10:09:56,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906613610] [2022-07-22 10:09:56,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:56,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 10:09:56,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 10:09:56,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-07-22 10:09:56,299 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:56,696 INFO L93 Difference]: Finished difference Result 272 states and 286 transitions. [2022-07-22 10:09:56,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 10:09:56,697 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 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 97 [2022-07-22 10:09:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:56,698 INFO L225 Difference]: With dead ends: 272 [2022-07-22 10:09:56,698 INFO L226 Difference]: Without dead ends: 140 [2022-07-22 10:09:56,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 10:09:56,699 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:56,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:09:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-22 10:09:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-07-22 10:09:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0579710144927537) internal successors, (146), 138 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 146 transitions. [2022-07-22 10:09:56,723 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 146 transitions. Word has length 97 [2022-07-22 10:09:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:56,724 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 146 transitions. [2022-07-22 10:09:56,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 146 transitions. [2022-07-22 10:09:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 10:09:56,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:56,725 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:56,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:56,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:56,925 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash 125199872, now seen corresponding path program 23 times [2022-07-22 10:09:56,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:56,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125885843] [2022-07-22 10:09:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:56,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 10:09:57,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:57,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125885843] [2022-07-22 10:09:57,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125885843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:57,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152517683] [2022-07-22 10:09:57,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:09:57,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:57,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:57,115 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:09:57,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 10:09:57,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 10:09:57,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:57,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 10:09:57,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 10:09:57,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 10:09:57,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152517683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:57,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:57,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-22 10:09:57,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688260328] [2022-07-22 10:09:57,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:57,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 10:09:57,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:57,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 10:09:57,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2022-07-22 10:09:57,577 INFO L87 Difference]: Start difference. First operand 139 states and 146 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:57,961 INFO L93 Difference]: Finished difference Result 191 states and 203 transitions. [2022-07-22 10:09:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 10:09:57,962 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 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 99 [2022-07-22 10:09:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:57,962 INFO L225 Difference]: With dead ends: 191 [2022-07-22 10:09:57,962 INFO L226 Difference]: Without dead ends: 110 [2022-07-22 10:09:57,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1284, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 10:09:57,964 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 282 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:57,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 42 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:09:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-22 10:09:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2022-07-22 10:09:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-07-22 10:09:57,983 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 99 [2022-07-22 10:09:57,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:57,983 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-07-22 10:09:57,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-07-22 10:09:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-22 10:09:57,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:57,983 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:09:58,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 10:09:58,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:58,184 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:58,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1992502938, now seen corresponding path program 24 times [2022-07-22 10:09:58,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:58,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20858900] [2022-07-22 10:09:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:58,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 25 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:10:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:05,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20858900] [2022-07-22 10:10:05,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20858900] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:05,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011507009] [2022-07-22 10:10:05,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:10:05,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:05,169 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:10:05,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 10:10:05,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-22 10:10:05,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:05,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 176 conjunts are in the unsatisfiable core [2022-07-22 10:10:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:05,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:10:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:13,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:10:13,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:13,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:13,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:10:13,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:13,785 INFO L356 Elim1Store]: treesize reduction 104, result has 58.2 percent of original size [2022-07-22 10:10:13,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 167 [2022-07-22 10:10:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 5 proven. 396 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:10:14,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 10:10:42,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011507009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:42,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:42,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 52, 43] total 161 [2022-07-22 10:10:42,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312951648] [2022-07-22 10:10:42,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:42,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-07-22 10:10:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-07-22 10:10:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=24611, Unknown=0, NotChecked=0, Total=25760 [2022-07-22 10:10:42,188 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 161 states, 161 states have (on average 1.68944099378882) internal successors, (272), 161 states have internal predecessors, (272), 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)