./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/min-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-multidimensional/min-3-n-u.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 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:40:57,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:40:57,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:40:57,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:40:57,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:40:57,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:40:57,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:40:57,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:40:57,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:40:57,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:40:57,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:40:57,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:40:57,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:40:57,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:40:57,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:40:57,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:40:57,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:40:57,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:40:57,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:40:57,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:40:57,430 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:40:57,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:40:57,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:40:57,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:40:57,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:40:57,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:40:57,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:40:57,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:40:57,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:40:57,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:40:57,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:40:57,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:40:57,458 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:40:57,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:40:57,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:40:57,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:40:57,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:40:57,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:40:57,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:40:57,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:40:57,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:40:57,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:40:57,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:40:57,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:40:57,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:40:57,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:40:57,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:40:57,492 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:40:57,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:40:57,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:40:57,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:40:57,493 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:40:57,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:40:57,494 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:40:57,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:40:57,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:40:57,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:40:57,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:40:57,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:40:57,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:40:57,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:40:57,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:40:57,495 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:40:57,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:40:57,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:40:57,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:40:57,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:40:57,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:40:57,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:40:57,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:40:57,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:40:57,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:40:57,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:40:57,498 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:40:57,499 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:40:57,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:40:57,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2022-07-20 21:40:57,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:40:57,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:40:57,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:40:57,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:40:57,769 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:40:57,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2022-07-20 21:40:57,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed26f602/3079e858073f49d8869377db98b49906/FLAG219f1baac [2022-07-20 21:40:58,208 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:40:58,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2022-07-20 21:40:58,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed26f602/3079e858073f49d8869377db98b49906/FLAG219f1baac [2022-07-20 21:40:58,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bed26f602/3079e858073f49d8869377db98b49906 [2022-07-20 21:40:58,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:40:58,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:40:58,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:40:58,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:40:58,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:40:58,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e231be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58, skipping insertion in model container [2022-07-20 21:40:58,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:40:58,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:40:58,788 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-multidimensional/min-3-n-u.c[321,334] [2022-07-20 21:40:58,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:40:58,813 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:40:58,823 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-multidimensional/min-3-n-u.c[321,334] [2022-07-20 21:40:58,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:40:58,843 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:40:58,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58 WrapperNode [2022-07-20 21:40:58,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:40:58,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:40:58,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:40:58,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:40:58,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,896 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2022-07-20 21:40:58,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:40:58,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:40:58,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:40:58,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:40:58,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:40:58,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:40:58,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:40:58,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:40:58,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (1/1) ... [2022-07-20 21:40:58,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:40:58,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:40:58,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:40:58,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:40:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:40:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:40:59,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:40:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:40:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:40:59,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:40:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:40:59,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:40:59,068 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:40:59,069 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:40:59,260 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:40:59,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:40:59,265 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-20 21:40:59,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:40:59 BoogieIcfgContainer [2022-07-20 21:40:59,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:40:59,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:40:59,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:40:59,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:40:59,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:40:58" (1/3) ... [2022-07-20 21:40:59,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15299606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:40:59, skipping insertion in model container [2022-07-20 21:40:59,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:40:58" (2/3) ... [2022-07-20 21:40:59,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15299606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:40:59, skipping insertion in model container [2022-07-20 21:40:59,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:40:59" (3/3) ... [2022-07-20 21:40:59,273 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2022-07-20 21:40:59,285 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:40:59,285 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:40:59,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:40:59,357 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@7bb55f6f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d2abcfe [2022-07-20 21:40:59,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:40:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:40:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:40:59,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:40:59,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:40:59,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:40:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:40:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2022-07-20 21:40:59,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:40:59,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865809545] [2022-07-20 21:40:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:40:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:40:59,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:40:59,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310549972] [2022-07-20 21:40:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:40:59,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:40:59,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:40:59,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:40:59,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:40:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:40:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-20 21:40:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:40:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:40:59,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:40:59,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:40:59,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865809545] [2022-07-20 21:40:59,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:40:59,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310549972] [2022-07-20 21:40:59,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310549972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:40:59,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:40:59,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:40:59,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3719540] [2022-07-20 21:40:59,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:40:59,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:40:59,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:40:59,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:40:59,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:40:59,652 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:40:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:40:59,670 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2022-07-20 21:40:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:40:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 21:40:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:40:59,679 INFO L225 Difference]: With dead ends: 56 [2022-07-20 21:40:59,679 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 21:40:59,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:40:59,686 INFO L413 NwaCegarLoop]: 38 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, 38 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 [2022-07-20 21:40:59,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:40:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 21:40:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-20 21:40:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:40:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-07-20 21:40:59,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2022-07-20 21:40:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:40:59,716 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-20 21:40:59,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:40:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-07-20 21:40:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:40:59,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:40:59,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:40:59,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:40:59,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-20 21:40:59,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:40:59,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:40:59,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2022-07-20 21:40:59,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:40:59,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290483745] [2022-07-20 21:40:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:40:59,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:40:59,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:40:59,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104988561] [2022-07-20 21:40:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:40:59,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:40:59,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:40:59,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:40:59,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:41:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:41:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:41:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:41:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:41:00,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:41:00,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:41:00,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290483745] [2022-07-20 21:41:00,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:41:00,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104988561] [2022-07-20 21:41:00,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104988561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:41:00,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:41:00,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:41:00,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857560576] [2022-07-20 21:41:00,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:41:00,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:41:00,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:41:00,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:41:00,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:41:00,092 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:41:00,154 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2022-07-20 21:41:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:41:00,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 21:41:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:41:00,156 INFO L225 Difference]: With dead ends: 48 [2022-07-20 21:41:00,164 INFO L226 Difference]: Without dead ends: 30 [2022-07-20 21:41:00,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:41:00,166 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:41:00,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:41:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-20 21:41:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-20 21:41:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-20 21:41:00,175 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2022-07-20 21:41:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:41:00,176 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-20 21:41:00,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-20 21:41:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 21:41:00,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:41:00,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:41:00,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:41:00,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-20 21:41:00,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:41:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:41:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2022-07-20 21:41:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:41:00,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480092400] [2022-07-20 21:41:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:00,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:41:00,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:41:00,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579413802] [2022-07-20 21:41:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:00,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:00,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:41:00,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:41:00,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:41:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:41:00,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:41:00,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:41:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:41:00,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:41:00,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:41:00,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480092400] [2022-07-20 21:41:00,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:41:00,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579413802] [2022-07-20 21:41:00,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579413802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:41:00,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:41:00,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:41:00,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252452820] [2022-07-20 21:41:00,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:41:00,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:41:00,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:41:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:41:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:41:00,488 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:41:00,560 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-07-20 21:41:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:41:00,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-20 21:41:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:41:00,562 INFO L225 Difference]: With dead ends: 67 [2022-07-20 21:41:00,564 INFO L226 Difference]: Without dead ends: 44 [2022-07-20 21:41:00,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:41:00,566 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:41:00,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:41:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-20 21:41:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-07-20 21:41:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-20 21:41:00,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-20 21:41:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:41:00,581 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-20 21:41:00,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-20 21:41:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 21:41:00,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:41:00,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:41:00,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:41:00,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:00,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:41:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:41:00,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2022-07-20 21:41:00,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:41:00,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045906996] [2022-07-20 21:41:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:00,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:41:00,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:41:00,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137514208] [2022-07-20 21:41:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:00,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:00,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:41:00,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:41:00,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:41:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:41:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:41:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:41:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:41:00,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:41:00,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:41:00,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045906996] [2022-07-20 21:41:00,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:41:00,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137514208] [2022-07-20 21:41:00,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137514208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:41:00,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:41:00,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:41:00,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748080798] [2022-07-20 21:41:00,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:41:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:41:00,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:41:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:41:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:41:00,875 INFO L87 Difference]: Start difference. First operand 29 states and 38 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) [2022-07-20 21:41:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:41:00,918 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-07-20 21:41:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:41:00,919 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 [2022-07-20 21:41:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:41:00,920 INFO L225 Difference]: With dead ends: 67 [2022-07-20 21:41:00,920 INFO L226 Difference]: Without dead ends: 41 [2022-07-20 21:41:00,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:41:00,922 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:41:00,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:41:00,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-20 21:41:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-07-20 21:41:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 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) [2022-07-20 21:41:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-20 21:41:00,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-20 21:41:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:41:00,930 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-20 21:41:00,930 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) [2022-07-20 21:41:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-20 21:41:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 21:41:00,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:41:00,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:41:00,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:41:01,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:01,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:41:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:41:01,148 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2022-07-20 21:41:01,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:41:01,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726643313] [2022-07-20 21:41:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:01,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:41:01,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:41:01,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966804486] [2022-07-20 21:41:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:01,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:01,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:41:01,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:41:01,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:41:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:41:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:41:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:41:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:41:01,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:41:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:41:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:41:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726643313] [2022-07-20 21:41:01,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:41:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966804486] [2022-07-20 21:41:01,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966804486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:41:01,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:41:01,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 21:41:01,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551325349] [2022-07-20 21:41:01,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:41:01,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:41:01,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:41:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:41:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:41:01,313 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:41:01,435 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2022-07-20 21:41:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:41:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 18 [2022-07-20 21:41:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:41:01,437 INFO L225 Difference]: With dead ends: 91 [2022-07-20 21:41:01,437 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 21:41:01,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:41:01,438 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:41:01,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 51 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:41:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 21:41:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-07-20 21:41:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-07-20 21:41:01,448 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2022-07-20 21:41:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:41:01,448 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-07-20 21:41:01,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-07-20 21:41:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 21:41:01,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:41:01,450 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:41:01,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 21:41:01,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:01,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:41:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:41:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2022-07-20 21:41:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:41:01,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798705239] [2022-07-20 21:41:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:01,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:41:01,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:41:01,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860831001] [2022-07-20 21:41:01,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:41:01,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:01,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:41:01,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:41:01,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:41:01,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 21:41:01,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:41:01,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:41:01,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:41:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:41:01,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:41:01,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:41:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798705239] [2022-07-20 21:41:01,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:41:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860831001] [2022-07-20 21:41:01,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860831001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:41:01,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:41:01,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:41:01,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788590001] [2022-07-20 21:41:01,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:41:01,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:41:01,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:41:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:41:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:41:01,780 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:41:01,832 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-07-20 21:41:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:41:01,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 21:41:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:41:01,835 INFO L225 Difference]: With dead ends: 121 [2022-07-20 21:41:01,835 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 21:41:01,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:41:01,837 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:41:01,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:41:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 21:41:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2022-07-20 21:41:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-07-20 21:41:01,848 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2022-07-20 21:41:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:41:01,848 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-07-20 21:41:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-07-20 21:41:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:41:01,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:41:01,850 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:41:01,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:41:02,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:02,064 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:41:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:41:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2022-07-20 21:41:02,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:41:02,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739387219] [2022-07-20 21:41:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:41:02,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:41:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794363618] [2022-07-20 21:41:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:02,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:02,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:41:02,087 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) [2022-07-20 21:41:02,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:41:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:41:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 21:41:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:41:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:41:02,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:41:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:41:02,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:41:02,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739387219] [2022-07-20 21:41:02,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:41:02,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794363618] [2022-07-20 21:41:02,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794363618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:41:02,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:41:02,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-20 21:41:02,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276217828] [2022-07-20 21:41:02,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:41:02,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:41:02,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:41:02,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:41:02,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:41:02,310 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:41:02,532 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2022-07-20 21:41:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:41:02,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-20 21:41:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:41:02,533 INFO L225 Difference]: With dead ends: 166 [2022-07-20 21:41:02,534 INFO L226 Difference]: Without dead ends: 115 [2022-07-20 21:41:02,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:41:02,535 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 305 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:41:02,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 86 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:41:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-20 21:41:02,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2022-07-20 21:41:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-07-20 21:41:02,551 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2022-07-20 21:41:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:41:02,551 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-07-20 21:41:02,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-07-20 21:41:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:41:02,553 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:41:02,553 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:41:02,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:41:02,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:02,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:41:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:41:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2022-07-20 21:41:02,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:41:02,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313592863] [2022-07-20 21:41:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:02,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:41:02,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:41:02,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288919738] [2022-07-20 21:41:02,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:41:02,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:02,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:41:02,785 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) [2022-07-20 21:41:02,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:41:02,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:41:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:41:02,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 21:41:02,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:41:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 21:41:03,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:41:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 21:41:03,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:41:03,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313592863] [2022-07-20 21:41:03,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:41:03,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288919738] [2022-07-20 21:41:03,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288919738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:41:03,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:41:03,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-20 21:41:03,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45212489] [2022-07-20 21:41:03,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:41:03,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:41:03,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:41:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:41:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:41:03,224 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-07-20 21:41:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:41:03,785 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2022-07-20 21:41:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:41:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) Word has length 63 [2022-07-20 21:41:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:41:03,787 INFO L225 Difference]: With dead ends: 316 [2022-07-20 21:41:03,787 INFO L226 Difference]: Without dead ends: 223 [2022-07-20 21:41:03,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:41:03,791 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 711 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:41:03,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 158 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:41:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-20 21:41:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2022-07-20 21:41:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2022-07-20 21:41:03,814 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2022-07-20 21:41:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:41:03,814 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2022-07-20 21:41:03,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-07-20 21:41:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2022-07-20 21:41:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 21:41:03,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:41:03,816 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:41:03,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:41:04,029 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,SelfDestructingSolverStorable7 [2022-07-20 21:41:04,030 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:41:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:41:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2022-07-20 21:41:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:41:04,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355097586] [2022-07-20 21:41:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:04,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:41:04,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:41:04,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722369042] [2022-07-20 21:41:04,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:41:04,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:04,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:41:04,054 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) [2022-07-20 21:41:04,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:41:04,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 21:41:04,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:41:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:41:04,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:41:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-20 21:41:04,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:41:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-20 21:41:04,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:41:04,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355097586] [2022-07-20 21:41:04,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:41:04,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722369042] [2022-07-20 21:41:04,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722369042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:41:04,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:41:04,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 21:41:04,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011456822] [2022-07-20 21:41:04,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:41:04,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:41:04,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:41:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:41:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:41:04,528 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:41:04,666 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2022-07-20 21:41:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:41:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 111 [2022-07-20 21:41:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:41:04,671 INFO L225 Difference]: With dead ends: 852 [2022-07-20 21:41:04,671 INFO L226 Difference]: Without dead ends: 703 [2022-07-20 21:41:04,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:41:04,674 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 267 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:41:04,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:41:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-07-20 21:41:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2022-07-20 21:41:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2022-07-20 21:41:04,729 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2022-07-20 21:41:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:41:04,729 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2022-07-20 21:41:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:41:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2022-07-20 21:41:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-20 21:41:04,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:41:04,743 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:41:04,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:41:04,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:04,956 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:41:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:41:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2022-07-20 21:41:04,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:41:04,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744091821] [2022-07-20 21:41:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:41:04,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:41:05,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 21:41:05,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950937497] [2022-07-20 21:41:05,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:41:05,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:41:05,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:41:05,028 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) [2022-07-20 21:41:05,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:41:05,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:41:05,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:41:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 275 conjunts are in the unsatisfiable core [2022-07-20 21:41:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:09,121 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-07-20 21:43:09,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:43:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744091821] [2022-07-20 21:43:09,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 21:43:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950937497] [2022-07-20 21:43:09,122 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-20 21:43:09,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-07-20 21:43:09,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:43:09,322 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,SelfDestructingSolverStorable9 [2022-07-20 21:43:09,323 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:929) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 44 more [2022-07-20 21:43:09,326 INFO L158 Benchmark]: Toolchain (without parser) took 130710.49ms. Allocated memory was 113.2MB in the beginning and 142.6MB in the end (delta: 29.4MB). Free memory was 75.9MB in the beginning and 90.6MB in the end (delta: -14.7MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2022-07-20 21:43:09,326 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 21:43:09,326 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.31ms. Allocated memory is still 113.2MB. Free memory was 75.7MB in the beginning and 86.9MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-20 21:43:09,326 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.70ms. Allocated memory is still 113.2MB. Free memory was 86.9MB in the beginning and 85.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 21:43:09,327 INFO L158 Benchmark]: Boogie Preprocessor took 40.39ms. Allocated memory is still 113.2MB. Free memory was 85.1MB in the beginning and 84.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 21:43:09,327 INFO L158 Benchmark]: RCFGBuilder took 327.30ms. Allocated memory is still 113.2MB. Free memory was 84.0MB in the beginning and 72.9MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-20 21:43:09,327 INFO L158 Benchmark]: TraceAbstraction took 130057.47ms. Allocated memory was 113.2MB in the beginning and 142.6MB in the end (delta: 29.4MB). Free memory was 72.2MB in the beginning and 90.6MB in the end (delta: -18.5MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2022-07-20 21:43:09,328 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.31ms. Allocated memory is still 113.2MB. Free memory was 75.7MB in the beginning and 86.9MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.70ms. Allocated memory is still 113.2MB. Free memory was 86.9MB in the beginning and 85.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.39ms. Allocated memory is still 113.2MB. Free memory was 85.1MB in the beginning and 84.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 327.30ms. Allocated memory is still 113.2MB. Free memory was 84.0MB in the beginning and 72.9MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 130057.47ms. Allocated memory was 113.2MB in the beginning and 142.6MB in the end (delta: 29.4MB). Free memory was 72.2MB in the beginning and 90.6MB in the end (delta: -18.5MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-multidimensional/min-3-n-u.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:43:10,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:43:10,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:43:11,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:43:11,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:43:11,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:43:11,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:43:11,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:43:11,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:43:11,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:43:11,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:43:11,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:43:11,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:43:11,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:43:11,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:43:11,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:43:11,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:43:11,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:43:11,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:43:11,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:43:11,023 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:43:11,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:43:11,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:43:11,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:43:11,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:43:11,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:43:11,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:43:11,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:43:11,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:43:11,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:43:11,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:43:11,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:43:11,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:43:11,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:43:11,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:43:11,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:43:11,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:43:11,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:43:11,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:43:11,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:43:11,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:43:11,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:43:11,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-20 21:43:11,084 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:43:11,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:43:11,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:43:11,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:43:11,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:43:11,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:43:11,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:43:11,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:43:11,088 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:43:11,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:43:11,089 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:43:11,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:43:11,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:43:11,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:43:11,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:43:11,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:43:11,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 21:43:11,091 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 21:43:11,091 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 21:43:11,091 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:43:11,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:43:11,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:43:11,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:43:11,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:43:11,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:43:11,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:43:11,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:43:11,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:43:11,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:43:11,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:43:11,094 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 21:43:11,094 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 21:43:11,094 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:43:11,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:43:11,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:43:11,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 21:43:11,095 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9bd7b1a8bed68c803bda82a4dd989302b30da7d6d96131ca67565e0ea166dbcb [2022-07-20 21:43:11,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:43:11,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:43:11,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:43:11,438 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:43:11,439 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:43:11,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2022-07-20 21:43:11,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57dc11438/b9e97ebd5cfc4aba882c1817ca2f9943/FLAGabf7fc371 [2022-07-20 21:43:11,958 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:43:11,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2022-07-20 21:43:11,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57dc11438/b9e97ebd5cfc4aba882c1817ca2f9943/FLAGabf7fc371 [2022-07-20 21:43:11,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57dc11438/b9e97ebd5cfc4aba882c1817ca2f9943 [2022-07-20 21:43:11,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:43:11,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:43:11,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:43:11,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:43:11,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:43:11,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:43:11" (1/1) ... [2022-07-20 21:43:11,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5add39e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:11, skipping insertion in model container [2022-07-20 21:43:11,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:43:11" (1/1) ... [2022-07-20 21:43:11,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:43:12,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:43:12,110 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-multidimensional/min-3-n-u.c[321,334] [2022-07-20 21:43:12,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:43:12,137 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:43:12,150 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-multidimensional/min-3-n-u.c[321,334] [2022-07-20 21:43:12,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:43:12,197 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:43:12,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12 WrapperNode [2022-07-20 21:43:12,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:43:12,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:43:12,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:43:12,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:43:12,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,245 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2022-07-20 21:43:12,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:43:12,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:43:12,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:43:12,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:43:12,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:43:12,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:43:12,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:43:12,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:43:12,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (1/1) ... [2022-07-20 21:43:12,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:43:12,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:43:12,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:43:12,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:43:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:43:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 21:43:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 21:43:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-20 21:43:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:43:12,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:43:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 21:43:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 21:43:12,450 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:43:12,451 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:43:12,923 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:43:12,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:43:12,928 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-20 21:43:12,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:43:12 BoogieIcfgContainer [2022-07-20 21:43:12,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:43:12,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:43:12,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:43:12,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:43:12,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:43:11" (1/3) ... [2022-07-20 21:43:12,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8fe8f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:43:12, skipping insertion in model container [2022-07-20 21:43:12,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:43:12" (2/3) ... [2022-07-20 21:43:12,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c8fe8f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:43:12, skipping insertion in model container [2022-07-20 21:43:12,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:43:12" (3/3) ... [2022-07-20 21:43:12,938 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2022-07-20 21:43:12,948 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:43:12,948 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:43:12,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:43:13,007 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@43283fe4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f649000 [2022-07-20 21:43:13,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:43:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:43:13,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:13,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:13,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2022-07-20 21:43:13,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:13,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403458551] [2022-07-20 21:43:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:43:13,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:13,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:13,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:13,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 21:43:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:43:13,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-20 21:43:13,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:43:13,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:43:13,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:13,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403458551] [2022-07-20 21:43:13,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403458551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:43:13,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:43:13,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:43:13,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326567096] [2022-07-20 21:43:13,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:43:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:43:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:43:13,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:43:13,203 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:13,217 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2022-07-20 21:43:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:43:13,219 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 21:43:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:13,225 INFO L225 Difference]: With dead ends: 56 [2022-07-20 21:43:13,225 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 21:43:13,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:43:13,232 INFO L413 NwaCegarLoop]: 38 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, 38 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 [2022-07-20 21:43:13,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:43:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 21:43:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-20 21:43:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-07-20 21:43:13,262 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2022-07-20 21:43:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:13,263 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-20 21:43:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-07-20 21:43:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 21:43:13,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:13,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:13,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-20 21:43:13,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:13,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2022-07-20 21:43:13,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:13,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759035705] [2022-07-20 21:43:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:43:13,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:13,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:13,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:13,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 21:43:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:43:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:43:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:43:13,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:43:13,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:13,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759035705] [2022-07-20 21:43:13,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759035705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:43:13,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:43:13,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:43:13,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046892660] [2022-07-20 21:43:13,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:43:13,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:43:13,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:43:13,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:43:13,573 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:13,792 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2022-07-20 21:43:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:43:13,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 21:43:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:13,800 INFO L225 Difference]: With dead ends: 48 [2022-07-20 21:43:13,800 INFO L226 Difference]: Without dead ends: 30 [2022-07-20 21:43:13,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:43:13,802 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:13,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:43:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-20 21:43:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-07-20 21:43:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-20 21:43:13,807 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2022-07-20 21:43:13,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:13,807 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-20 21:43:13,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-20 21:43:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 21:43:13,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:13,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:13,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:43:14,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:14,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2022-07-20 21:43:14,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:14,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125147753] [2022-07-20 21:43:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:43:14,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:14,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:14,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:14,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 21:43:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:43:14,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:43:14,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:43:14,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:43:14,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125147753] [2022-07-20 21:43:14,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125147753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:43:14,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:43:14,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:43:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965046581] [2022-07-20 21:43:14,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:43:14,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:43:14,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:43:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:43:14,120 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:14,445 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2022-07-20 21:43:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:43:14,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-20 21:43:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:14,447 INFO L225 Difference]: With dead ends: 67 [2022-07-20 21:43:14,447 INFO L226 Difference]: Without dead ends: 44 [2022-07-20 21:43:14,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:43:14,448 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:14,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:43:14,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-20 21:43:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-07-20 21:43:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-20 21:43:14,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-20 21:43:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:14,454 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-20 21:43:14,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-20 21:43:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 21:43:14,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:14,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:14,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:43:14,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:14,657 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2022-07-20 21:43:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:14,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407195482] [2022-07-20 21:43:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:43:14,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:14,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:14,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 21:43:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:43:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:43:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:43:14,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:43:14,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:14,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407195482] [2022-07-20 21:43:14,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407195482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:43:14,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:43:14,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:43:14,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820044180] [2022-07-20 21:43:14,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:43:14,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:43:14,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:43:14,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:43:14,762 INFO L87 Difference]: Start difference. First operand 29 states and 38 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) [2022-07-20 21:43:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:15,013 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-07-20 21:43:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:43:15,014 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 [2022-07-20 21:43:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:15,015 INFO L225 Difference]: With dead ends: 67 [2022-07-20 21:43:15,015 INFO L226 Difference]: Without dead ends: 41 [2022-07-20 21:43:15,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:43:15,016 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:15,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:43:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-20 21:43:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-07-20 21:43:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 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) [2022-07-20 21:43:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-20 21:43:15,024 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-20 21:43:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:15,024 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-20 21:43:15,024 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) [2022-07-20 21:43:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-20 21:43:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 21:43:15,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:15,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:15,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:43:15,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:15,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2022-07-20 21:43:15,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:15,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804877487] [2022-07-20 21:43:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:43:15,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:15,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:15,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:15,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 21:43:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:43:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:43:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:43:15,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:43:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:43:15,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804877487] [2022-07-20 21:43:15,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804877487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:43:15,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:43:15,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 21:43:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766565271] [2022-07-20 21:43:15,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:43:15,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:43:15,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:43:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:43:15,385 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:16,047 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2022-07-20 21:43:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:43:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 18 [2022-07-20 21:43:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:16,048 INFO L225 Difference]: With dead ends: 91 [2022-07-20 21:43:16,048 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 21:43:16,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:43:16,050 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:16,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 68 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 21:43:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 21:43:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-07-20 21:43:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-07-20 21:43:16,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 18 [2022-07-20 21:43:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:16,066 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-07-20 21:43:16,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-07-20 21:43:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 21:43:16,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:16,068 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:16,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-20 21:43:16,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:16,278 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1195208863, now seen corresponding path program 2 times [2022-07-20 21:43:16,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:16,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660813671] [2022-07-20 21:43:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:43:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:16,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:16,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 21:43:16,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 21:43:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:43:16,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 21:43:16,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-20 21:43:16,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 21:43:16,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:16,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660813671] [2022-07-20 21:43:16,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660813671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:43:16,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:43:16,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:43:16,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239786602] [2022-07-20 21:43:16,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:43:16,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:43:16,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:43:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:43:16,374 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:16,726 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-07-20 21:43:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:43:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 21:43:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:16,736 INFO L225 Difference]: With dead ends: 121 [2022-07-20 21:43:16,736 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 21:43:16,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:43:16,737 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:16,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 41 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:43:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 21:43:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 54. [2022-07-20 21:43:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-07-20 21:43:16,750 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 21 [2022-07-20 21:43:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:16,751 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-07-20 21:43:16,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:16,751 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-07-20 21:43:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 21:43:16,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:16,752 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:16,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:43:16,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:16,962 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 1 times [2022-07-20 21:43:16,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:16,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210382641] [2022-07-20 21:43:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:43:16,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:16,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:16,967 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:16,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 21:43:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:43:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 21:43:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:43:17,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:43:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 21:43:17,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210382641] [2022-07-20 21:43:17,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210382641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:43:17,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:43:17,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-20 21:43:17,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081407926] [2022-07-20 21:43:17,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:43:17,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 21:43:17,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 21:43:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-20 21:43:17,346 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:19,362 INFO L93 Difference]: Finished difference Result 166 states and 217 transitions. [2022-07-20 21:43:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:43:19,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-20 21:43:19,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:19,364 INFO L225 Difference]: With dead ends: 166 [2022-07-20 21:43:19,364 INFO L226 Difference]: Without dead ends: 115 [2022-07-20 21:43:19,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:43:19,365 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 363 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:19,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 198 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 21:43:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-20 21:43:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2022-07-20 21:43:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 95 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-07-20 21:43:19,385 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 39 [2022-07-20 21:43:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:19,385 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-07-20 21:43:19,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-07-20 21:43:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 21:43:19,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:19,393 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:19,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:43:19,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:19,605 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:19,606 INFO L85 PathProgramCache]: Analyzing trace with hash 66224111, now seen corresponding path program 2 times [2022-07-20 21:43:19,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:19,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080312692] [2022-07-20 21:43:19,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:43:19,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:19,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:19,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:19,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-20 21:43:19,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:43:19,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:43:19,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 21:43:19,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 21:43:19,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:43:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 21:43:20,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:20,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080312692] [2022-07-20 21:43:20,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080312692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:43:20,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:43:20,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-20 21:43:20,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343072570] [2022-07-20 21:43:20,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:43:20,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:43:20,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:43:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:43:20,492 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-07-20 21:43:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:25,644 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2022-07-20 21:43:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:43:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) Word has length 63 [2022-07-20 21:43:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:25,646 INFO L225 Difference]: With dead ends: 316 [2022-07-20 21:43:25,646 INFO L226 Difference]: Without dead ends: 223 [2022-07-20 21:43:25,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 21:43:25,648 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1416 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:25,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 678 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 21:43:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-20 21:43:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 180. [2022-07-20 21:43:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2905027932960893) internal successors, (231), 179 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2022-07-20 21:43:25,668 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 63 [2022-07-20 21:43:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:25,668 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2022-07-20 21:43:25,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2022-07-20 21:43:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2022-07-20 21:43:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 21:43:25,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:25,670 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:25,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-20 21:43:25,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:25,884 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash 811802927, now seen corresponding path program 3 times [2022-07-20 21:43:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610941880] [2022-07-20 21:43:25,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:43:25,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:25,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:25,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 21:43:26,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 21:43:26,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:43:26,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:43:26,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-20 21:43:26,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:43:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2022-07-20 21:43:26,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:26,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610941880] [2022-07-20 21:43:26,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610941880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:43:26,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:43:26,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-20 21:43:26,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284796069] [2022-07-20 21:43:26,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:43:26,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 21:43:26,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 21:43:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:43:26,625 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:27,245 INFO L93 Difference]: Finished difference Result 852 states and 1104 transitions. [2022-07-20 21:43:27,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:43:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 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 111 [2022-07-20 21:43:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:27,248 INFO L225 Difference]: With dead ends: 852 [2022-07-20 21:43:27,248 INFO L226 Difference]: Without dead ends: 703 [2022-07-20 21:43:27,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-20 21:43:27,249 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 267 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:27,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 97 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:43:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-07-20 21:43:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 480. [2022-07-20 21:43:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2713987473903967) internal successors, (609), 479 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 609 transitions. [2022-07-20 21:43:27,290 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 609 transitions. Word has length 111 [2022-07-20 21:43:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:27,290 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 609 transitions. [2022-07-20 21:43:27,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 609 transitions. [2022-07-20 21:43:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-20 21:43:27,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:27,296 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:27,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:43:27,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:27,507 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1613933369, now seen corresponding path program 4 times [2022-07-20 21:43:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:27,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059571467] [2022-07-20 21:43:27,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:43:27,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:27,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:27,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:27,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 21:43:28,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:43:28,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:43:28,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:43:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:43:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16128 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 14277 trivial. 0 not checked. [2022-07-20 21:43:28,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:43:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16128 backedges. 1598 proven. 253 refuted. 0 times theorem prover too weak. 14277 trivial. 0 not checked. [2022-07-20 21:43:30,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 21:43:30,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059571467] [2022-07-20 21:43:30,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059571467] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:43:30,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 21:43:30,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-07-20 21:43:30,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192227585] [2022-07-20 21:43:30,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 21:43:30,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 21:43:30,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 21:43:30,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 21:43:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:43:30,321 INFO L87 Difference]: Start difference. First operand 480 states and 609 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:43:45,381 INFO L93 Difference]: Finished difference Result 1503 states and 2052 transitions. [2022-07-20 21:43:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-20 21:43:45,382 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 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 411 [2022-07-20 21:43:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:43:45,385 INFO L225 Difference]: With dead ends: 1503 [2022-07-20 21:43:45,385 INFO L226 Difference]: Without dead ends: 1027 [2022-07-20 21:43:45,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1823, Invalid=3433, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 21:43:45,388 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 4502 mSDsluCounter, 2402 mSDsCounter, 0 mSdLazyCounter, 3585 mSolverCounterSat, 1683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4502 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1683 IncrementalHoareTripleChecker+Valid, 3585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:43:45,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4502 Valid, 2515 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1683 Valid, 3585 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-07-20 21:43:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-07-20 21:43:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 936. [2022-07-20 21:43:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 1.267379679144385) internal successors, (1185), 935 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1185 transitions. [2022-07-20 21:43:45,454 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1185 transitions. Word has length 411 [2022-07-20 21:43:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:43:45,454 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1185 transitions. [2022-07-20 21:43:45,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 50 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:43:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1185 transitions. [2022-07-20 21:43:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-07-20 21:43:45,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:43:45,471 INFO L195 NwaCegarLoop]: trace histogram [184, 184, 184, 184, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:43:45,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:43:45,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 21:43:45,687 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:43:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:43:45,688 INFO L85 PathProgramCache]: Analyzing trace with hash 788549945, now seen corresponding path program 5 times [2022-07-20 21:43:45,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 21:43:45,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529178273] [2022-07-20 21:43:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:43:45,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 21:43:45,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 21:43:45,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 21:43:45,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process